The Synthesis Structure And Photophysical Properties Of Phosphorescent Cyclometalated Nnc Coordinated Platinum Complexes

Download The Synthesis Structure And Photophysical Properties Of Phosphorescent Cyclometalated Nnc Coordinated Platinum Complexes full books in PDF, epub, and Kindle. Read online The Synthesis Structure And Photophysical Properties Of Phosphorescent Cyclometalated Nnc Coordinated Platinum Complexes ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

THE SYNTHESIS, STRUCTURE AND PHOTOPHYSICAL PROPERTIES OF PHOSPHORESCENT CYCLOMETALATED N^N^C-COORDINATED PLATINUM COMPLEXES.

Author : Robert Mroz
Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.:/5 (957 download)

DOWNLOAD NOW!

Book Synopsis THE SYNTHESIS, STRUCTURE AND PHOTOPHYSICAL PROPERTIES OF PHOSPHORESCENT CYCLOMETALATED N^N^C-COORDINATED PLATINUM COMPLEXES. by : Robert Mroz

Download or read book THE SYNTHESIS, STRUCTURE AND PHOTOPHYSICAL PROPERTIES OF PHOSPHORESCENT CYCLOMETALATED N^N^C-COORDINATED PLATINUM COMPLEXES. written by Robert Mroz and published by . This book was released on 2016 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorescent materials based on cyclometalated platinum complexes have attracted a great deal of attention because of their potential in chemical, biological and optoelectronic applications, specifically as emitters in organic light-emitting diode devices. In addition, development of phosphorescent materials emitting in the deep red and/or near infrared region have become a popular area of focus because of their capabilities as chemosensors, in solar cells and bioimaging dyes. Several classes of phosphorescent cyclometalated platinum complexes based on tridentate and tetradentate ligands have already been developed by our lab. In this study, two series of cyclometalated N^N^C Pt(II) complexes 1a-6a and 1b-6b, were designed to emit throughout a wide range of the visible spectrum and were successfully synthesized bearing either a phenyl acetylide or phenyl ancillary ligand. The photophysical properties of complexes can be tuned as desired through methodical modifications of the cyclometalating or ancillary ligand with varying electron accepting or donating moieties. Photophysical studies were conducted on the synthesized complexes and found emission wavelengths ranging from 496-643 nm, quantum yield ([Phi]p) values between 43.0% and [less than] 0.1% and lifetimes ([tau]) as long as 13.1 [micro]s at 298 K. TD-DFT calculations of ground state HOMO and LUMO orbitals, as well as X-ray crystallographic analysis of select complexes were conducted and analyzed. The data comparison of the obtained results between the phenyl acetylide and phenyl coordinated complexes assists in identifying any structure-photophysical property relationships present, which will be discussed in detail.

Synthesis and Photophysical Characterization of Tridentate C^N*N Platinum (II) Complexes

Author : Deepak Ravindranathan
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (81 download)

DOWNLOAD NOW!

Book Synopsis Synthesis and Photophysical Characterization of Tridentate C^N*N Platinum (II) Complexes by : Deepak Ravindranathan

Download or read book Synthesis and Photophysical Characterization of Tridentate C^N*N Platinum (II) Complexes written by Deepak Ravindranathan and published by . This book was released on 2012 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis, structure, and photophysical properties of a series of novel, highly luminescent tridentate platinum complexes with general coordination geometry of (C^N*N)-PtL are reported, where "C^N" denotes a coordination of C and N to the platinum to form a five-membered metallacycle and "N*N" denotes a coordination of two N atoms to the platinum to form a six-membered metallacycle; L is a mono anionic ligand such as halides or acetylides. Compared to the known (C^N^N)-PtL type of complexes that were reported to emit with low quantum yields, the structural modification leads to dramatic improvements in phosphorescence efficiency. For example, new complexes (C^N*N)-PtL with L = hexylacetylide and phenylacetylide emitted intensely with quantum yields of 47% and 56%, respectively, latter of which is among the highest quantum yields reported so far for cyclometalated platinum (II) complexes. Selectivity in C-H bond activation by platinum and the exact mechanism of cycloplatination are issues that still remain unclear. A series of ligands which include sp2/sp3, primary/secondary sp3 C-H bonds, and aromatic/vinylic sp2 C-H bonds with a carbon linker between the bipyridine and the carbon groups have been prepared. All ligands have been attempted for cycloplatination in glacial acetic acid and acetonitrile. All ligands produced the same sp2 C-H bond activated complex in both solvents, which suggests that the linker atom does play a role on selectivity.

Synthesis, Structure, Photophysics, and Biological Activity of Platinum (II) Complexes

Author : Dileep Atchyuth Kumar Vezzu
Publisher :
ISBN 13 :
Total Pages : 291 pages
Book Rating : 4.:/5 (857 download)

DOWNLOAD NOW!

Book Synopsis Synthesis, Structure, Photophysics, and Biological Activity of Platinum (II) Complexes by : Dileep Atchyuth Kumar Vezzu

Download or read book Synthesis, Structure, Photophysics, and Biological Activity of Platinum (II) Complexes written by Dileep Atchyuth Kumar Vezzu and published by . This book was released on 2013 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis, structure, and photophysical properties of luminescent platinum (II) complexes with different coordination patterns, (C^C*N^N), (N^C*N), (N^N*C) and (N^N^C) are reported, where "C^N or N^N" denotes a bidentate coordination to the platinum to form a five-membered metallacycle and "C*N" denotes a bidentate coordination to the platinum to form a six-membered metallacycle. Sixteen cyclometalated platinum complexes have been synthesized with different coordination patterns, which include six complexes with tridentate N^C*N cyclometalating ligands (13, 14, 15, 16, 17, and 18), five complexes with N^N*C cyclometalating ligands (19a, 19b, 20a, 20b, and 24), three complexes with N^N^C cyclometalating ligands (21a, 21b, and 29) and two complexes with tetradentate C^C*N^N cyclometalating ligands (33 and 34). The structures of the platinum complexes 13, 15, 16, 18, 19a, 19b, 20a, 21a, 21b, 24, 29, 33, and 39 were determined by single crystal X-ray diffraction. In platinum complexes with five-six membered metallacycle (15, 16, 18, 19a, 19b, 20a, 24, and 39), the square geometry of the complexes is improved when compared to that of platinum complexes with five-five membered metallacycle as the biting angle is increased. The tetradentate coordination (C^C*N^N), square planar geometry of complex 33 are revealed from its X-ray crystal structure. The DFT calculations have been carried out on complexes 13, 14, 15, 16, 17, 18, 33, and 34 to examine the molecular orbital character of the complexes, which are used in interpreting the electronic spectra of the complexes. The photophysical properties of the platinum complexes were studied and a majority of the complexes were highly emissive in solution at room temperature. Complex 13 exhibited the highest quantum yield (65%) among all of the complexes. Self quenching was not observed in a majority of the platinum complexes at lower concentrations. The cytotoxicity (IC50) of the complexes in three lung cancerous cell lines and one prostate cancer cell line were determined by MTT assay. The toxic platinum complexes induced the cell death by triggering apoptosis. The interactions of the platinum complexes with plasmid and calf thymus DNA were studied. Activation of caspase -7, PARP, and p53 were also observed in RV1 and HCC827 cell lines when treated with platinum complexes. Complexes 35, 37 and 38 were more potent than the clinically approved drug, cis-platin.

Luminescent Platinum(ii) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(ii)-Containing Phosphorescent Polymers

Download Luminescent Platinum(ii) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(ii)-Containing Phosphorescent Polymers PDF Online Free

Author : Wai-Yip Tong
Publisher : Open Dissertation Press
ISBN 13 : 9781361342602
Total Pages : pages
Book Rating : 4.3/5 (426 download)

DOWNLOAD NOW!

Book Synopsis Luminescent Platinum(ii) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(ii)-Containing Phosphorescent Polymers by : Wai-Yip Tong

Download or read book Luminescent Platinum(ii) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(ii)-Containing Phosphorescent Polymers written by Wai-Yip Tong and published by Open Dissertation Press. This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Luminescent Platinum(II) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(II)-containing Phosphorescent Polymers: Synthesis, Photophysical Properties and Material Applications" by Wai-yip, Tong, 唐煒燁, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled LUMINESCENT PLATINUM(II) COMPLEXES CONTAINING DIANIONIC TETRADENTATE LIGANDS HAVING MIXED OXYGEN, NITROGEN AND CARBON DONOR ATOMS AND PLATINUM(II)-CONTAINING PHOSPHORESCENT POLYMERS: SYNTHESIS, PHOTOPHYSICAL PROPERTIES AND MATERIAL APPLICATIONS Submitted by TONG WAI YIP for the degree of Doctor of Philosophy at The University of Hong Kong in May 2014 Square planar platinum(II) complexes exhibit rich photophysical properties which are tunable through the structural variation of ligands and can be harnessed for applications in materials science. In this thesis, the great variety of spectroscopic properties of various square planar cyclometalated platinum(II) complexes supported by tetradentate (O DEGREESN DEGREESN DEGREESC and O DEGREESN DEGREESC DEGREESN) and tridentate (C DEGREESN DEGREESN) ligands containing dipyridyl moieties will be highlighted, along with their synthesis, characterization and potential application in organic light emitting diodes (OLEDs). Ind Platinum(II) complexes supported by tetradentate O DEGREESN DEGREESN DEGREESC or O DEGREESN DEGREESN DEGREESC types of ligands (O DEGREESN DEGREESN DEGREESC = 2-(4-(3,5-di-tert-butylphenyl)-6'-phenyl-2,2'- Ind bipyridin-6-yl)phenolate; O DEGREESN DEGREESN DEGREESC = 5,5-dialkyl-2-(6-phenylpyridin-2-yl) indeno[1,2-b]pyridin-9-olate) are emissive in solution at room temperature, with emission maxima tunable from 582 nm to 640 nm and quantum yields up to 0.28. Mechanochromism and the associated luminescence change in [Pt(dihexyl- Ind O DEGREESN DEGREESN DEGREESC)] (Complex 3.6) were found associated with the two different crystal packings revealed by powder X-ray diffraction (PXRD) studies. Fast vapochromic response of [Pt(3-O DEGREESN DEGREESN-2,6-difluoropyridine)] (Complex 3.3) on chloroform or dichloromethane vapours was found to be associated with structural changes in the solid state through PXRD studies. Robust and strongly emissive platinum(II) complexes supported by tetradentate O DEGREESN DEGREESC DEGREESN ligands featuring fused six-five-six membered metallacyclic ring (O DEGREESN DEGREESC DEGREESN = 2-(4-(3,5-di-tert-butylphenyl)-6-(9-(pyridin-2-yl) carbazol-2-yl)pyridin-2-yl)phenol) have been prepared. These platinum(II) complexes are among the most efficient yellow phosphors, with emission maxima ranging from 526 nm to 553 nm and luminescence quantum yields as high as -1 0.47-0.86. A yellow OLED with power efficiency (η ) up to 52 lm W is power demonstrated. In combination with the typical blue emitting iridium(III) 2' bis(4,6-difluorophenyl-pyridinato-N, C ) picolinate (FIrpic), white organic -1 light-emitting diodes (WOLEDs) displayed η up to 61 lm W and reduced power -2 efficiency roll-off at 1000 cd m . Random copolymers with photo-inert backbone poly[(N-vinylcarbazole)-co- ((R-C DEGREESN DEGREESN)Pt)] and poly[(2-(4-tert-butylphenyl)-5-(4-vinylphenyl)-1,3,4- oxadiazole)-co-((R-C DEGREESN DEGREESN)Pt)] (R-C DEGREESN DEGREESN = 3-(6-phenyl-4-(4-vinylphenyl) pyridine-2-yl)-isoquinoline or 3-(4-(4-(dec-9-enyloxy)phenyl)-6-phenylpyridin- 2-yl)isoquinoline) have been synthesized and characterized. Energy transfer between the charge transporting units and emissive (R-C DEGREESN DEGREESN)Pt units was revealed through ICP-MS inve

Synthesis, Characterization, and Photophysical Properties of Cyclometalated Platinum(II) Complexes

Author : Claudio Pio Mastrocinque
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (143 download)

DOWNLOAD NOW!

Book Synopsis Synthesis, Characterization, and Photophysical Properties of Cyclometalated Platinum(II) Complexes by : Claudio Pio Mastrocinque

Download or read book Synthesis, Characterization, and Photophysical Properties of Cyclometalated Platinum(II) Complexes written by Claudio Pio Mastrocinque and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Luminescent Platinum(ii), Palladium(ii) and Gold(iii) Complexes Containing Isocyanide, Alkynyl and N-Heterocyclic Carbene Ligands

Author : Faan-Fung Hung
Publisher : Open Dissertation Press
ISBN 13 : 9781361385432
Total Pages : pages
Book Rating : 4.3/5 (854 download)

DOWNLOAD NOW!

Book Synopsis Luminescent Platinum(ii), Palladium(ii) and Gold(iii) Complexes Containing Isocyanide, Alkynyl and N-Heterocyclic Carbene Ligands by : Faan-Fung Hung

Download or read book Luminescent Platinum(ii), Palladium(ii) and Gold(iii) Complexes Containing Isocyanide, Alkynyl and N-Heterocyclic Carbene Ligands written by Faan-Fung Hung and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Luminescent Platinum(II), Palladium(II) and Gold(III) Complexes Containing Isocyanide, Alkynyl and N-heterocyclic Carbene Ligands: Synthesis, Photophysical Properties and Material Applications" by Faan-fung, Hung, 孔繁峰, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Several cyclometalated Pt(II) isocyanide complexes containing C-deprotonated C DEGREESN DEGREESC ligands (C DEGREESN DEGREESC = 2,6-diphenylpyridine derivatives) were synthesized. These complexes display orange-red emissions with max at 582-619 nm and quantum yields of up to 26% in CH2Cl2 at room temperature. The incorporation of carbazole/fluorene/thiophene unit(s) to C DEGREESN DEGREESC ligands leads to minimized structural distortion of complexes in their excited states and thereby suppresses non-radiative decay pathways. The high thermal stability (Td >300 C) renders these complexes good candidates as phosphorescent dopants in organic light-emitting diodes (OLEDs). Red-emitting OLEDs with CIE coordinates of (0.650.01, 0.350.01) were fabricated by vacuum deposition, showing a maximum external efficiency of 12%. In addition, well-defined nano/microstructures were obtained from self-assembly of these complexes driven by π∙∙∙π, C-H∙∙∙π and C-H∙∙∙H-C interactions as observed in the crystal structures. Two series of organopalladium(II) alkynyl complexes containing a terpy (terpy = 2,2':6',2''-terpyridine) or C DEGREESN DEGREESC pincer carbene ligand (C DEGREESN DEGREESC = 2,6-bis(1-butylimidazol-2-ylidenyl)pyridine) were prepared. These complexes are non-emissive in solution at room temperature except that the one containing both C DEGREESN DEGREESC and pyrenylacetylide ligands shows phosphorescence (Φ = 0.3%) originating from intraligand state of the acetylide ligand. This could be attributed to the strong -donating N-heterocyclic carbene (NHC) in the pincer ligand that strongly destabilizes d-d state, the population of which provides an efficient non-radiative decay channel. To make comparison between Pd(II) and Pt(II) complexes with the two ligand systems, Pt(II) C DEGREESN DEGREESC alkynyl complexes were also prepared. They are emissive in solution and some display excimer emissions at high concentration (〖10〗 DEGREES(-4)-〖10〗 DEGREES(-3) mol 〖10dm〗 DEGREES(-3)). The X-ray crystal structures of [Pd(L)(CCPh)](〖PF〗_6) (L = terpy and C DEGREESN DEGREESC) revealed one-dimensional chain stacking of complex cations with alternating Pd(II)∙∙∙Pd(II) contacts of about 3.29-3.35 A and π-π interactions of about 3.4 A . Well-defined submicron/nanostructures were obtained from self-assembly of Pd(II) and Pt(II) alkynyl complexes driven by π-π interactions between aromatic moieties and/or metal∙∙∙metal interactions. DFT calculations on the optimized structures of [M(L)(CCPh)]+ (M = Pd(II) and Pt(II)) revealed the existence of metal∙∙∙metal closed-shell interactions. In addition, the complex containing the C DEGREESN DEGREESC ligand exhibits slightly enhanced metal∙∙∙metal interactions and larger "bonding" energy upon dimerization. Furthermore, spin-orbit coupling between singlet and triplet excited states is more effective which promotes rapid intersystem crossing. A new class of cyclometalated Au(III) complexes containing C-deprotonated C DEGREESN ligands (C DEGREESN = 2-phenylpyridine and its derivatives) and cis-chelating bis-NHC ligands was synthesized. These are the first examples of Au(III) complexes supported by cis-chelating bis-NHC ligands. They display emissions in solution under degassed condition at room temperature with &

Syntheses, Characterization and Photophysical Properties of Platinum(ii) and Gold(i) Complexes Containing Ortho- And Meta-Oligo(phenyleneethynylene) Ligands

Download Syntheses, Characterization and Photophysical Properties of Platinum(ii) and Gold(i) Complexes Containing Ortho- And Meta-Oligo(phenyleneethynylene) Ligands PDF Online Free

Author : 朱明新
Publisher : Open Dissertation Press
ISBN 13 : 9781374682672
Total Pages : pages
Book Rating : 4.6/5 (826 download)

DOWNLOAD NOW!

Book Synopsis Syntheses, Characterization and Photophysical Properties of Platinum(ii) and Gold(i) Complexes Containing Ortho- And Meta-Oligo(phenyleneethynylene) Ligands by : 朱明新

Download or read book Syntheses, Characterization and Photophysical Properties of Platinum(ii) and Gold(i) Complexes Containing Ortho- And Meta-Oligo(phenyleneethynylene) Ligands written by 朱明新 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Syntheses, Characterization and Photophysical Properties of Platinum(II) and Gold(I) Complexes Containing Ortho- and Meta-oligo(phenyleneethynylene) Ligands" by 朱明新, Mingxin, Zhu, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled SYNTHESES, CHARACTERIZATION AND PHOTOPHYSICAL PROPERTIES OF PLATINUM(II) AND GOLD(I) COMPLEXES CONTAINING ORTHO- AND META- OLIGO(PHENYLENEETHYNYLENE) LIGANDS Submitted by Zhu Mingxin for the degree of Doctor of Philosophy at The University of Hong Kong in March 2008 Metal complexes containing oligo(phenyleneethynylene) (PE) are of great importance in photophysics and material science. The syntheses, characterizations and photophysical properties of the light-emitting platinum(II) and gold(I) complexes with flexible ortho- and meta-PE and 2,5-diphenyl-1,3,4-oxadiazole ligands were described. Several novel dinuclear terpyridyl platinum(II) complexes with ortho-PE ligands were synthesized and their crystal structures were determined. The t t 2+ t platinum(II) complexes [( Bu tpy)Pt-(ortho-PE)-Pt( Bu tpy)] ( Bu tpy = 4,4′,4″-tri- 3 3 3 tert-butyl-2,2′ 6′,2″-terpyridine) adopted a helical conformation in their crystal structures, and their phosphorescence recorded in acetonitrile/water mixtures shifted to lower energy with enhanced intensity when the water content increased. A hydrophobic folding process was suggested for the complexes with long ortho-PE(n) (n >= 3), and the red-shifted and enhanced phosphorescence was attributed to inter- and intra-molecular π-π interactions. The mononuclear terpyridine and C DEGREESN DEGREESN capped t + platinum(II) complexes [( Bu tpy)Pt-(ortho-PE)] and [(C DEGREESN DEGREESN)Pt-(ortho-PE)] (HC DEGREESN DEGREESN = 6-phenyl-2,2′-bipyridine) were studied for comparison. A series of mononuclear and dinuclear ortho- and meta-PE gold(I) complexes, [(PCy )Au-(ortho-PE)] (PCy = tricyclohexylphosphine), [(PCy )Au-(ortho-PE)- 3 3 3 Au(PCy)], [(PCy )Au-(meta-PE)] and [(PCy )Au-(meta-PE)-Au(PCy)] were 3 3 3 3 synthesized to examine the effect of ortho- and meta-conjugation. A ππ* emission of the PE ligands was switched on at room temperature by the attachment of [Au(PCy )] fragment due to the heavy atom effect. The delayed fluorescence from the ππ* excited states of the PE ligands was observed, and a triplet-triplet annihilation pathway was proposed. The difference in conjugation of para-, ortho- and meta-PE ligation was examined by comparison of the singlet and triplet emission energies of the gold(I) complexes. By extrapolating the plot of the emission energy against the PE chain length in the complex, the triplet emission energies of poly(ortho-PE) and poly(meta-PE) were estimated to be 530 and 470 nm respectively. These complexes together with the reported [Au(PCy )] complexes containing para-PE ligands, constitute a complete class of [Au(PCy )] supported phenyleneethynylene complexes. 2+ New ortho-PE ligands were used as flexible linkers for [Pt(PEt ) ] moieties 3 2 (PEt = triethylphosphine). Three neutral platinum(II) macrocycles with the maximum ring size of 60 atoms were synthesized and their crystal structures were determined, 31 revealing decreased nuclearity when the ortho-PE length increases. The P NMR spectra of [Pt(PEt ) {ortho-PE(5)}] with a rigid conformation at various temperatures 3 2 are consistent with the calculated spectrum of ABX spin system. A series of platinum(II)-bis(triethylphosphine) complexes containing 2,5- diphenyl-1,3,4-oxadiazole moiety were synthesized, and

Design and Synthesis of Cyclometalated Transition Metal Complexes as Functional Phosphorescent Materials

Author : Shuang Liu (Ph. D.)
Publisher :
ISBN 13 :
Total Pages : 185 pages
Book Rating : 4.:/5 (89 download)

DOWNLOAD NOW!

Book Synopsis Design and Synthesis of Cyclometalated Transition Metal Complexes as Functional Phosphorescent Materials by : Shuang Liu (Ph. D.)

Download or read book Design and Synthesis of Cyclometalated Transition Metal Complexes as Functional Phosphorescent Materials written by Shuang Liu (Ph. D.) and published by . This book was released on 2012 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyclometalated Ir(III) and Pt(II) compounds are among the most promising phosphorescent emitters for various applications, such as organic light emitting diodes (OLEDs), chemical sensors and bioimaging labels. This family of complexes exhibits high thermal and photo-stability, excellent quantum efficiency, and relatively short lifetime. More importantly, their luminescent properties can be fully tunable by modifying the coordinating ligands. In this thesis, a series of 2-(1,2,3-triazol-4-yl)-pyridine derivatives, referred to as the "click" ligands, are used to build phosphorescent Ir(III) and Pt(II) compounds. The robust and tolerant nature of the copper mediated 1,3-dipolar cycloaddition reactions offers great flexibility in the molecular design. Chapter 1 and Chapter 2 focus on the synthesis of heteroleptic cyclometalated Ir (III) and Pt(II) complexes by utilizing the Cu(I) triazolide intermediates generated in "click" reactions as transmetalating reagents. Ligand synthesis and metalation can be achieved in one pot under mild reaction conditions. For the Ir(III) system, the "click" ligands show switchable coordination modes, between the C, N- and N, N-chelation. These ligands act as C, N, N-bridging units to form unique zwitterionic dinuclear complexes with two cyclometalated Pt(II) units. In Chapter 3, cyclometalated Pt(II) complexes with N, N-chelating "click" ligands are synthesized. Their aggregation-induced solid-state emission is highly responsive to environmental stimuli, such as solvents, heat and mechanical force. This family of compounds represents the first thermotropic Col(h) liquid crystals with only one sidechain. Furthermore, the combined liquid crystalline and mechanochromic properties make them attractive functional materials.

Synthetic Metal-Containing Polymers

Author : Ian Manners
Publisher : John Wiley & Sons
ISBN 13 : 3527605088
Total Pages : 288 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!

Book Synopsis Synthetic Metal-Containing Polymers by : Ian Manners

Download or read book Synthetic Metal-Containing Polymers written by Ian Manners and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of the field of synthetic metal-containing polymers - where metal atoms form an integral part of the main chain or side group structure of a polymer - aims to create new materials which combine the processability of organic polymers with the physical or chemical characteristics associated with the metallic element or complex. This book covers the major developments in the synthesis, properties, and applications of synthetic metal-containing macromolecules, and includes chapters on the preparation and characterization of metal-containing polymers, metallocene-based polymers, rigid-rod organometallic polymers, coordination polymers, polymers containing main group metals, and also covers dendritic and supramolecular systems. The book describes both polymeric materials with metals in the main chain or side group structure and covers the literature up to the end of 2002.

Synthesis, Characterization, and Photophysical Properties of Cyclometalated N-Heterocyclic Carbene Platinum(II) Complexes

Author : Francesco Mastrocinque
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (143 download)

DOWNLOAD NOW!

Book Synopsis Synthesis, Characterization, and Photophysical Properties of Cyclometalated N-Heterocyclic Carbene Platinum(II) Complexes by : Francesco Mastrocinque

Download or read book Synthesis, Characterization, and Photophysical Properties of Cyclometalated N-Heterocyclic Carbene Platinum(II) Complexes written by Francesco Mastrocinque and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thiophene and benzothiophene ligands containing N-heterocyclic carbene (NHC) moieties were used to synthesize five and six-membered Pt(II) metallacycles. Ligand scaffolding was synthesized using two methods. The five-membered metallacycles were produced using a coupling reaction, utilizing Cu2O as the inorganic catalyst. The six-membered metallacycles were synthesized using a nucleophilic substitution reaction. The ligands were then metalated using chelate-assisted C-H activation. The synthesis, characterization, and photophysical properties of these NHC-functionalized, cyclometalated products are reported.

Luminescent Platinum(II) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(II)-containing Phosphorescent Polymers

Author : 唐煒燁
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (881 download)

DOWNLOAD NOW!

Book Synopsis Luminescent Platinum(II) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(II)-containing Phosphorescent Polymers by : 唐煒燁

Download or read book Luminescent Platinum(II) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(II)-containing Phosphorescent Polymers written by 唐煒燁 and published by . This book was released on 2014 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Design, Synthesis and Photophysical Properties of Dinuclear Platinum (II) Complexes with Varying Bridging and Cyclometalating Ligands

Download Design, Synthesis and Photophysical Properties of Dinuclear Platinum (II) Complexes with Varying Bridging and Cyclometalating Ligands PDF Online Free

Author : Subhangi Roy
Publisher :
ISBN 13 :
Total Pages : 189 pages
Book Rating : 4.:/5 (129 download)

DOWNLOAD NOW!

Book Synopsis Design, Synthesis and Photophysical Properties of Dinuclear Platinum (II) Complexes with Varying Bridging and Cyclometalating Ligands by : Subhangi Roy

Download or read book Design, Synthesis and Photophysical Properties of Dinuclear Platinum (II) Complexes with Varying Bridging and Cyclometalating Ligands written by Subhangi Roy and published by . This book was released on 2018 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Theoretical Investigation on the Electronic Structures and Phosphorescent Properties of a Series of Cyclometalated Platinum(II) Complexes with Different Substituted N-heterocyclic Carbene Ligands

Download Theoretical Investigation on the Electronic Structures and Phosphorescent Properties of a Series of Cyclometalated Platinum(II) Complexes with Different Substituted N-heterocyclic Carbene Ligands PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (15 download)

DOWNLOAD NOW!

Book Synopsis Theoretical Investigation on the Electronic Structures and Phosphorescent Properties of a Series of Cyclometalated Platinum(II) Complexes with Different Substituted N-heterocyclic Carbene Ligands by :

Download or read book Theoretical Investigation on the Electronic Structures and Phosphorescent Properties of a Series of Cyclometalated Platinum(II) Complexes with Different Substituted N-heterocyclic Carbene Ligands written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Iridium(III) in Optoelectronic and Photonics Applications

Author : Eli Zysman-Colman
Publisher : John Wiley & Sons
ISBN 13 : 1119007151
Total Pages : 736 pages
Book Rating : 4.1/5 (19 download)

DOWNLOAD NOW!

Book Synopsis Iridium(III) in Optoelectronic and Photonics Applications by : Eli Zysman-Colman

Download or read book Iridium(III) in Optoelectronic and Photonics Applications written by Eli Zysman-Colman and published by John Wiley & Sons. This book was released on 2017-03-07 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental photophysical properties of iridium(III) materials make this class of materials the pre-eminent transition metal complex for use in optoelectronic applications. Iridium(III) in Optoelectronic and Photonics Applications represents the definitive account of photoactive iridium complexes and their use across a wide variety of applications. This two-volume set begins with an overview of the synthesis of these complexes and discusses their photophysical properties. The text highlights not only mononuclear complexes but also the properties of multinuclear and polymeric iridium-based materials and the assembly of iridium complexes into larger supramolecular architectures such as MOFs and soft materials. Chapters devoted to the use of these iridium-based materials in diverse optoelectronic applications follow, including: electroluminescent devices such as organic light emitting diodes (OLEDs) and light-emitting electrochemical cells (LEECs); electrochemiluminescence (ECL); bioimaging; sensing; light harvesting in the context of solar cell applications; in photoredox catalysis and as components for solar fuels. Although primarily targeting a chemistry audience, the wide applicability of these compounds transcends traditional disciplines, making this text also of use to physicists, materials scientists or biologists who have interests in these areas.

Synthesis and Photophysical Study of Cyclometalated Platinum Complexes

Author : Dileep Atchyuth Kumar Vezzu
Publisher :
ISBN 13 :
Total Pages : 148 pages
Book Rating : 4.:/5 (435 download)

DOWNLOAD NOW!

Book Synopsis Synthesis and Photophysical Study of Cyclometalated Platinum Complexes by : Dileep Atchyuth Kumar Vezzu

Download or read book Synthesis and Photophysical Study of Cyclometalated Platinum Complexes written by Dileep Atchyuth Kumar Vezzu and published by . This book was released on 2009 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Synthesis, Structure, and Reactivity of Five-coordinate Platinum(IV) Complexes

Author : Avery T. Luedtke
Publisher :
ISBN 13 :
Total Pages : 151 pages
Book Rating : 4.:/5 (244 download)

DOWNLOAD NOW!

Book Synopsis Synthesis, Structure, and Reactivity of Five-coordinate Platinum(IV) Complexes by : Avery T. Luedtke

Download or read book Synthesis, Structure, and Reactivity of Five-coordinate Platinum(IV) Complexes written by Avery T. Luedtke and published by . This book was released on 2007 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Structure, Electronic, and Photophysical Properties of Platinum(ii) Biphenyl Complexes Containing 2,20́9-bipyridine and 1,10-phenanthroline Derivatives

Download Structure, Electronic, and Photophysical Properties of Platinum(ii) Biphenyl Complexes Containing 2,20́9-bipyridine and 1,10-phenanthroline Derivatives PDF Online Free

Author : Wei Huang
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (785 download)

DOWNLOAD NOW!

Book Synopsis Structure, Electronic, and Photophysical Properties of Platinum(ii) Biphenyl Complexes Containing 2,20́9-bipyridine and 1,10-phenanthroline Derivatives by : Wei Huang

Download or read book Structure, Electronic, and Photophysical Properties of Platinum(ii) Biphenyl Complexes Containing 2,20́9-bipyridine and 1,10-phenanthroline Derivatives written by Wei Huang and published by . This book was released on 2010 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Platinum(II) biphenyl diimine complexes have been synthesized and characterized. Single crystal X-ray structures from seven complexes show two types of configurations about the platinum coordination sphere in the solid state: X and B (butterfly). The two configurations give different circular dichroism spectra (CD) based on their C2 or Cs symmetry. The metal-to-ligand charge transfer (MLCT) bands which occur at ~440 nm are transitions from d orbitals on the platinum metal center to * orbitals of the diimine ligands. This agrees with the time dependant density functional theory (TDDFT) calculations where the lowest unoccupied molecular orbitals (LUMO) are located on diimine ligands. Emission spectra of the complexes can be divided into three groups according to different emission excited states: group I, ligand centered transitions (LC); group II, ligand field transitions (LF) and group III, metal-to-ligand charge transfer (MLCT). Emission profiles from the groups are different from one another: LC transitions have vibronic structures; LF transitions have sharp peaks without vibronic structure and MLCT transitions have a broad peak without vibronic structure. Linear free energy correlations were found between emission maxims, reduction potentials and emission lifetimes with Hammett sp values. The diimine with electron donating substituents have the higher energy emission maxima and the longer emission life time. The diimine with electron withdrawing substituents has the lower energy emission maxima and the shorter emission life time.