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Synthesis And Characterization Of Iminic And Heterocyclic Ligands And Their Mono And Di Orthometallated Platinum Ii Complexes
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Book Synopsis Synthesis and characterization of iminic and heterocyclic ligands, and their mono- and di-orthometallated platinum (II) complexes by : Peter Milano
Download or read book Synthesis and characterization of iminic and heterocyclic ligands, and their mono- and di-orthometallated platinum (II) complexes written by Peter Milano and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and characterization of platinum(II) complexes with thiophene-based ligands by : Julienne Sarabia
Download or read book Synthesis and characterization of platinum(II) complexes with thiophene-based ligands written by Julienne Sarabia and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Platinum (II) Complexes with Diazine Ligands by : Julien Priqueler
Download or read book Synthesis and Characterization of Platinum (II) Complexes with Diazine Ligands written by Julien Priqueler and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design, Synthesis, and Reactivity of Bimetallic Complexes of Dimethylplatinum(II) Containing Ditopic Ligands by : Matthew S. McCready
Download or read book Design, Synthesis, and Reactivity of Bimetallic Complexes of Dimethylplatinum(II) Containing Ditopic Ligands written by Matthew S. McCready and published by . This book was released on 2015 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a study of monometallic and bimetallic dimethylplatinum(II) complexes containing ditopic nitrogen donor ligands. This work details the design and synthesis of side-to-side and cofacial arranged ligands and their respective coordination chemistry. The study of the synthesis, characterization and reaction mechanisms of the various dimethylplatinum(II) complexes is outlined in detail with special emphasis focused on the reactivity of the complexes towards oxidative addition. The ditopic ligand 6-dppd, 1,4-di(2-pyridyl)-5,6,7,8,9,10- hexahydrocycloocta[d]pyridazine, was observed to coordinate only a single equivalent of a platinum(II) center. The inability to coordinate a second equivalent, even through an assisted bridging atom, is presumed to be due to a steric clash between the free pyridyl group and the cyclooctyl backbone. In attempts to make heterobimetallic complexes of 6-dppd, the complex [PtMe2(6-dppd)] was observed to react preferentially with mercuric halides by oxidative addition rather than coordination of the mercuric salt in the second coordination site giving complexes [PtXMe2(HgX)(6-dppd)] where X = Br, Cl, OAc. This indicates that the platinum center is actually a better nucleophile than the free pyridyl nitrogen atom. The oxidative addition of solvent dichloromethane was also observed showing the enhancedreactivity of [PtMe2(6-dppd)]. Finally, [PtMe2(6-dppd)] was treated with DCl at low temperature to give the deuteridoplatinum(IV) complex. The deuteridoplatinum(IV) complex reductively eliminates methane in solution and extensive H/D exchange occurs into the CH4 product at low temperature indicating very easy reversibility of the exchange between hydridomethylplatinum(IV) and methaneplatinum(II) complexes. The abstraction of a chloride ligand from [PtClMe(6-dppd)] led to the formation of a complex dimer structure endo, endo-[Pt2Me2(?2-?3-6-dppd)2][OTf]2. This process allowed for the formation of a bimetallic platinum(II) complex which retained the initial stereochemistry. The protonolysis of [PtMe2(6-dppd)] with one equivalent of HOTf led to the generation of methane gas and the concomitant formation of both endo, endo-[Pt2Me2(?2-?3-6-dppd)2][OTf]2 and exo, exo-[Pt2Me2(?2-?3-6-dppd)2][OTf]2. The structures of the exo isomeric clamshell dimers appeared much less sterically hindered in the solid state and were observed experimentally and computationally to be the thermodynamically preferred isomers. The mechanism, selectivity and reversibility of this isomerism process was explored in detail. The reactions of [PtMe2(6-dppd)] with alkyl bromides RCH2Br, which possess hydrogen bonding functionality, result in the formation of stable organoplatinum(IV) complexes capable of forming supramolecular structure via hydrogen bonding. Both intra and inter molecular hydrogen bonding is observed in the formation of supramolecular architectures which self-assemble in the solid state through additional?-stacking and weak secondary interactions. The new anthracene derived ditopic ligands, bpad = N1,N8-bis(pyridin-2- ylmethylene)anthracene-1,8-diamine and adpa = (N, N)-4,4'-(anthracene-1,8-diylbis(ethyne- 2,1-diyl))-bis(N-(pyridin-2-ylmethylene)aniline) were prepared, characterized and used to coordinate dimethylplatinum(II) centers giving cofacial bimetallic complexes of dimethylplatinum(II). [Pt2Me4(bpad)] was shown to degrade over time in solution through a proposed metalation event involving the anthracene backbone. The oxidative addition of a variety of substrates was performed using [Pt2Me4(adpa)] giving stable diplatinum(IV) complexes as characterized by 1H NMR spectroscopy. The new xanthene derived ditopic ligands, ppxda = 2,7-di-tert-butyl-9,9-dimethyl-N4,N5-bis(4-(pyridin-2- ylmethyleneamino)phenyl)-xanthene-4,5-dicarboxamide and pmxda = 2,7-di-tert-butyl-9,9- dimethyl-bis(pyridine-2-ylmethylene)-9H-xanthene-4,5-diamine were prepared characterized and used to ligate two equivalents of a dimethylplatinum(II) center. Diplatinum complexes of both ligands were shown to easily undergo oxidative addition to give the corresponding diplatinum(IV) complexes which adopt the anti orientation. The syn alignment of metal centers was accessible through the abstraction of halides ligands and incorporation of bridging groups as is the case for the pyrazine bridged bimetallic platinum complex [Pt2Me6(C4H4N2)(pmxda)][OSO2CF3]2.
Book Synopsis Synthesis and characterization of platinum(II) complexes from quinoline or pyridine functionalized benzothiophene ligands by : Leila Duman
Download or read book Synthesis and characterization of platinum(II) complexes from quinoline or pyridine functionalized benzothiophene ligands written by Leila Duman and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis and Characterization of Mono- and Dinuclear Platinum (II) Olefin Complexes Containing Pyrazole and Pyrazolato Ligands by : William Cullen Deese
Download or read book The Synthesis and Characterization of Mono- and Dinuclear Platinum (II) Olefin Complexes Containing Pyrazole and Pyrazolato Ligands written by William Cullen Deese and published by . This book was released on 1982 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Novel Iminopyridinium Platinum (II) Coordination Complexes as Potential Chemotherapeutic Drugs by : Khandra Barrett
Download or read book Synthesis and Characterization of Novel Iminopyridinium Platinum (II) Coordination Complexes as Potential Chemotherapeutic Drugs written by Khandra Barrett and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rational Design, Synthesis and Characterization of Amide Functionalized Pyridine and Benzimidazole Transition Metal Complexes by : Samuel S. K. Asem
Download or read book Rational Design, Synthesis and Characterization of Amide Functionalized Pyridine and Benzimidazole Transition Metal Complexes written by Samuel S. K. Asem and published by . This book was released on 2011 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study expands our efforts to make a new class of Pt (II) compounds analogous to cisplatin and its derivatives using sterically hindered ligands. Pt compounds in this series have been synthesized using specially designed pyridine and benzimidazole ligands. These heterocycles, amide functionalized at position 2 with aryl and alkyl pendants, rapidly change their mode of coordination depending on the pH of the medium. These ligands, synthesized using condensation chemistry, also coordinate to Co(II), Ni(H), Cu(lI), and Zn(1I) generally as anionic bis-chelates through the benzimidazole nitrogen and the carbonyl oxygen, creating a four-coordinate complex with the exception of an unusual trigonal bipyramidal Zn(H) complex. I H NMR temperature studies reveal that these ligands interconvert between imide and amide isomers and that electron withdrawing pendants favor amide isomers. Crystal structures of Co(II) and Ni(1I) complexes of N-( I-methylbenzimidazol-2-yl)cyclohexanecarboxamide, for example, show two ligands bind per metal ion when reacted with acetate and nitrate salts. The bischelates of these Ni(1I) complexes also show expansions of their coordination spheres from four to five-coordinate. Furthermore, these Ni(II) bis-chelated complexes possess square planar or distorted 4-coordinate geometries. The synthesis and properties of several new Pt (II) complexes containing these ligands will be presented. A second generation and novel complex class containing metal-binding, linker and recognition domains is reported. Both classes of Pt complexes were obtained using a synthetic methodology which favors the cis isomers. The second generation complex crystallizes in the monoclinic space group P2dn with lattice dimensions a = 17.7393(5) A, b = 11.4632(3) A, c = 19.3959(5) A and ~ = 99.794(3)°. These complexes have been characterized using physical methods that include X-ray crystallography, IH &13C NMR, Mass spectrometry, UV and IR spectroscopies. Complexes similar in structure to cisplatin and carboplatin show varying cytotoxic properties toward different cancer cell lines. Additionally, some of these new Pt complexes show comparable and promising cytotoxicity against prostate cancer cell lines.
Book Synopsis Synthesis and Characterization of Platinum (II) Comlplexes with Diazine Ligands by : Julien Priqueler
Download or read book Synthesis and Characterization of Platinum (II) Comlplexes with Diazine Ligands written by Julien Priqueler and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis DESIGN & SYNTHESIS OF LUMINESC by : Suk-Hang Lam
Download or read book DESIGN & SYNTHESIS OF LUMINESC written by Suk-Hang Lam and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design and Synthesis of Luminescent Platinum(II) and Gold(III) Complexes With Tridentate Pincer-type Ligands: From Computational Study to Experiments and Application Studies" by Suk-hang, Lam, 林淑恒, 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 DESIGN AND SYNTHESIS OF LUMINESCENT PLATINUM(II) AND GOLD(III) COMPLEXES WITH TRIDENTATE PINCER-TYPE LIGANDS - FROM COMPUTATIONAL STUDY TO EXPERIMENTS AND APPLICATION STUDIES Submitted by LAM Suk Hang for the degree of Doctor of Philosophy at The University of Hong Kong in June 2015 Square planar platinum(II) and gold(III) complexes possess unique spectroscopic and photophysical properties which enable them as promising candidates for many applications such as optoelectronic devices and biological sensors. The understanding of the intrinsic properties of these complexes is therefore essential to optimize their performance as well as provide guidance on the molecular design for specific applications. This thesis aims to provide useful insights for the molecular design strategies with the aid of computational studies to tune the electronic properties of these complexes and electroluminescence studies in the fabrication of organic light-emitting devices (OLEDs). Computational studies have been performed to inspect electronic structures and photophysical properties as well as their correlation with the nature of ancillary ligands in the platinum(II) complexes of 1,3-bis(N-alkylbenzimidazol-2′-yl)benzene, [Pt(bzimb)(C≡C-R)], 1,3-bis-hetero-azolylbenzenes, [Pt(N DEGREESC DEGREESN)(C≡C-R)], and pyridine-based N-heterocyclic carbene, [Pt(NHC)(C≡C-R)] . It was found that the emission of the arylalkynylplatinum(II) complexes with pyridine-based N-heterocyclic carbene ligand was originated from the triplet alkynyl-to-tridentate pincer ligand-to-ligand charge transfer excited state mixed with platinum-to-tridentate pincer metal-to-ligand charge transfer character, and the excited state energy was found to be red-shifted according to the increasing π electron-donating ability of the aryl group attached to the alkynyl ligand. On the other hand, the emission energies of the platinum(II) complexes of 1,3-bis(N-alkylbenzimidazol-2′-yl)benzene and 1,3-bis-hetero-azolylbenzenes were found to be dependent on the different electron-donating substituents on the pincer ligands. Calculations have also been performed on the representative alkynylplatinum(II) + + complexes [Pt(trpy)(C≡C-R)] (trpy = 2,2′ 6′,2′′-terpyridine), [Pt(bzimpy)(C≡C-R)] (bzimpy = 2,6-bis(N-alkylbenzimidazol-2′-yl)pyridine) and [Pt(bzimb)(C≡C-R)] as well as alkynylgold(III) complexes [Au(C DEGREESN DEGREESC)(C≡C-R)] (C DEGREESN DEGREESC = 2,6-diphenylpyridine), [Au{C(Np) DEGREESN DEGREESC(Np)}(C≡C-R)] (C(Np) DEGREESN DEGREESC(Np) = 2,6-di(2-naphthyl)pyridine) and [Au(N DEGREESN DEGREESN)(C≡C-R)] (N DEGREESN DEGREESN = 2,6-bis(1H-benzimidazol-2-yl)pyridine) in order to have a better understanding on their nature of the emissive origins as well as the radiative and nonradiative processes. In particular, factors governing the ordering of the triplet excited states and radiative decay rate constants of the emissive state ( ES) have been examined. Their potential energy profiles for the deactivation process from the ES via triplet metal-centered states have also been explored. This study revealed for the first time the potential energy profiles for the thermal deactivation pathway of square planar platinum(II) and gold(III) complexes. In addition to the computational
Book Synopsis Synthesis, Luminescence and Host-Guest Chemistry of Mono- and Dinuclear Platinum(ii) Complexes of Pyridyl and Diphosphine Ligands by : Pui-Ling Tang
Download or read book Synthesis, Luminescence and Host-Guest Chemistry of Mono- and Dinuclear Platinum(ii) Complexes of Pyridyl and Diphosphine Ligands written by Pui-Ling Tang and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Synthesis, Luminescence and Host-guest Chemistry of Mono- and Dinuclear Platinum(II) Complexes of Pyridyl and Diphosphine Ligands" by Pui-ling, Tang, 鄧佩玲, 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. DOI: 10.5353/th_b3124365 Subjects: Platinum Complex compounds Ligands Charge transfer
Book Synopsis Synthesis and characterization of bismetalated platinum complexes containing benzothiophene functionalized ligands by : Asad Hashmi
Download or read book Synthesis and characterization of bismetalated platinum complexes containing benzothiophene functionalized ligands written by Asad Hashmi and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chiral Mono- and α-Diimines and Their Pd(II) Complexes with Anticancer Activity by : Guadalupe Hernández
Download or read book Chiral Mono- and α-Diimines and Their Pd(II) Complexes with Anticancer Activity written by Guadalupe Hernández and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this review is to provide mainly an outlook of the synthesis and characterization of chiral mono- and α-diimines ligands and their Pd(II) complexes carried out in our group in the last few years. Some other issues with simple chiral imines synthesized in our lab are also outlined. The report includes details about their versatile coordination patterns, biological activity in cancer cell lines, and engaging properties in different fields, such as materials science.
Book Synopsis Luminescent Mixed Ligand Square Planar Platinum(II) Complexes Containing Dithiolate Or Dithiocarbamate Ligands by : Joanne McDonald Bevilacqua
Download or read book Luminescent Mixed Ligand Square Planar Platinum(II) Complexes Containing Dithiolate Or Dithiocarbamate Ligands written by Joanne McDonald Bevilacqua and published by . This book was released on 1994 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis Structure and Spectroscopy of Platinum (II) Diimine Complexes with Potentially Facially-coordinating Ligands by :
Download or read book Synthesis Structure and Spectroscopy of Platinum (II) Diimine Complexes with Potentially Facially-coordinating Ligands written by and published by . This book was released on 2005 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis and Characterization of Novel Platinum (II) Complexes Containing Bulky Aromatic Groups by : Khyati Mittal
Download or read book The Synthesis and Characterization of Novel Platinum (II) Complexes Containing Bulky Aromatic Groups written by Khyati Mittal and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six iminopyridine ligands were prepared from the condensation of 6-methyl-2-pyridinecarboxyaldehyde and the corresponding primary amines containing bulky cycloalkyl groups. Addition of these ligands to [PtCl2(coe)]2 (coe=cis-cyclooctene) gave the desired platinum(II) coordination complexes in moderate to high yields. All compounds were fully characterized using FT-IR and multinuclear NMR spectroscopy. Solid compounds were subjected to melting point analysis. Elemental analysis (EA) was performed on three of the platinum(II) complexes. Future work will involve completing elemental analysis studies and performing biological testing. X-ray diffraction studies must be performed to support the existing characterization data.
Book Synopsis Bis(imidazolyl)carbazolide Platinum(II) Alkynyls by : Tadeas Liska
Download or read book Bis(imidazolyl)carbazolide Platinum(II) Alkynyls written by Tadeas Liska and published by . This book was released on 2021 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scope of this dissertation is the synthetic design and fundamental characterization of a novel type of platinum based lumophore. The discovery of a new type of cyclometallated Pt(II) phosphor that features a rare tetrahedrally distorted geometry and emits efficiently in solid state or as a 2 % (w/w) PMMA film is detailed. The bis(imidazolyl)carbazolide ligand is utilized as a monoanionic tridentate scaffold from which to design a family of Pt(II) complexes with variable alkynyl ligands. Full synthetic procedures are developed and optimized. Computational modeling with TD-DFT complements experimental data to rationally design complexes with charge-transfer character responsible for their emissive state. Physical characterization of crystal structure, thermal stability, and electrochemical probing are undertaken. The resulting species are found to have no close-contacts between Pt(II) centers due to their unusual and bulky geometries. The species are all strongly emissive in the solid state with up to 93 % quantum yield and all feature long lived millisecond excited state decay lifetimes. Similarly dispersions in PMMA film also experience significant enhancement in emission parameters as compared to when they are in solution. As a result significant thermal non-radiative relaxation is implicated that is attenuated when the species are in a rigidified state or matrix.
