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Design And Synthesis Of Iron Ii Terpyridyl Complexes For Application In Dye Sensitized Solar Cells
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Book Synopsis Design and Synthesis of Iron (II) Terpyridyl Complexes for Application in Dye-sensitized Solar Cells by : Lindsey Louise Jamula
Download or read book Design and Synthesis of Iron (II) Terpyridyl Complexes for Application in Dye-sensitized Solar Cells written by Lindsey Louise Jamula and published by . This book was released on 2010 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: The threat of global climate change is highly concerning as societies continue to rely heavily on fossil fuels to fulfill the world's energy needs. It is pertinent to look to alternative energy sources to meet the increasing global energy requirements. Solar energy may be a viable option to meet electricity demands and is an area of research worth pursuing. Titanium dioxide-based dye-sensitized solar cells (DSSCs) provide a promising alternative to high cost silicon-based solar cells. In order to achieve cost/efficiency ratios in DSSCs necessary for them to compete with fossil fuels we set out to explore the use of first row transition metal-based chromophores. A series of iron(II) terpyridyl complexes have been designed to gain a better understanding of the ultrafast dynamics of potential chromophores in DSSCs. Iron(II) polypyridyl complexes inherently have short-lived charge transfer excited states. New terpyridyl ligands have been prepared, in which steric hinderance has been introduced to impose strain along a torsional coordinate in the iron(II) adducts for the analysis of a proposed relaxation pathway of the charge-transfer excited state. Details on the development of the synthesis of these compounds are presented along with full characterization of the ligands and iron(II) adducts. The fundamental understanding that we hope to gain from the forthcoming analysis of these complexes is pertinent toward the development of iron(II) based sensitizers in DSSCs.
Book Synopsis Photochemistry and Photophysics of Coordination Compounds by : Rakshit Ameta
Download or read book Photochemistry and Photophysics of Coordination Compounds written by Rakshit Ameta and published by Elsevier. This book was released on 2023-06-24 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photochemistry and Photophysics of Coordination Compounds: Fundamentals and Applications provides a systematic overview of the photochemical and photophysical properties of coordination compounds with different metal cores. Beginning with a clear introduction to the fundamentals of both photochemistry and coordination chemistry, the book goes on to outline the photochemical and photophysical properties of a large range of coordination compounds, clustering metal cores together in chapters according to their period table group, ranging across Transition metals, Lanthanides and Actinides. In addition to outlining their properties, each chapter discusses the synthesis, current applications and future potential of coordination compounds in each group. Drawing on the experience of a global team of experts, this book is an authoritative guide for all those interested in understanding and harnessing the photochemical properties and potential applications of coordination complexes for their own work. Introduces the fundamentals of both photochemistry and coordination compounds Supports learning through carefully structured content, with chapters uniquely arranged by period table group Bridges the knowledge gap between theory and practice by presenting application examples in each chapter
Book Synopsis Design and Synthesis of Functionalized Alkynylplatinum (II) Polypyridyl Complexes and Oligothienylenevinylene Derivatives by : Chi-Ho Kwok
Download or read book Design and Synthesis of Functionalized Alkynylplatinum (II) Polypyridyl Complexes and Oligothienylenevinylene Derivatives written by Chi-Ho Kwok 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, "Design and Synthesis of Functionalized Alkynylplatinum (II) Polypyridyl Complexes and Oligothienylenevinylene Derivatives: From Dye-sensitized Solar Cells to Bilayer Heterojunction Photovoltaics" by Chi-ho, Kwok, 郭志豪, 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: A series of alkynylplatinum(II) polypyridine complexes with 4,4′,4′′-tricarboxy-2,2′ 6′,2′′-terpyridine and 4,4′-dicarboxy-2,2′-bipyridine as TiO2 anchoring functionalities, has been successfully synthesized. Their photophysical, electrochemical and luminescence properties have been extensively studied. The excited state properties were probed using nanosecond transient absorption spectroscopy. [Pt(tctpy)(C≡C-Th-BTD-Th)][NnBu4]2 displayed a long-lived transient signal which was tentatively assigned to result from the formation of a charge-separated state, which could be alternatively described as a [Pt(tctpy) (C≡C-Th-BTD-Th)]?] state, with the charge recombination rate constant determined to be 2.9 105 s?1. The excited state redox potentials for the oxidation process were determined and the data confirmed the ability of the complexes to inject an electron into the conduction band of TiO2. The majority of the complexes were found to sensitize the nanocrystalline TiO2 and exhibit photovoltaic properties, which have been characterized by current-voltage measurements under illumination of air mass (AM) 1.5G sunlight (100 mW cm-2). A new class of molecular dyads comprising metalloporphyrin-linked alkynylplatinum(II) polypyridine complexes was synthesized and characterized. Their photophysical, electrochemical and luminescence properties have been studied in detail. The excited state properties were probed using nanosecond transient absorption spectroscopy which indicated the formation of a charge-separated state involving the porphyrin radical anion, [Por －(C≡C)Pt]?]. The excited state redox potentials for the oxidation process were also determined with the data supporting the capability of the complexes to inject an electron into the conduction band of TiO2. The majority of the complexes were found to sensitize the nanocrystalline TiO2 and exhibit photovoltaic properties, as characterized by current-voltage measurements under illumination of air mass (AM) 1.5G sunlight (100 mW cm-2). A series of organic materials consisting of a triphenylamine-based donor with oligothiophene or oligothienylenevinylene based-conjugated linker and dicyanovinyl, tricyanovinyl or cyanacrylic acid groups as acceptor, was synthesized and characterized. Their photophysical, electrochemical, thermal and luminescence properties were studied. Transient absorption spectra of TPA-OTV-DCN in dichloromethane solution on the pico- to nanosecond timescale were recorded after femtosecond laser excitation at 400 nm. A transient signal at ca. 700 nm was tentatively assigned to result from the formation of a charge-separated [(TPA-OTV)] DCN ] state with the charge recombination rate constant determined to be 5.3 109 s?1. The energy levels of the LUMOs of TPA-OTV1-DCN, TPA-OTV2-DCN, TPA-OTV3-DCN TPA-TAZ1-DCN, TPA-TAZ2-DCN and TPA-o-4Th-DCN were calculated to be of ca. ?3.9 eV, establishing the formation of a downhill driving force for the energetically favorable electron transfer process involvi
Book Synopsis Design and Synthesis of Functionalized Alkynylplatinum (II) Polypyridyl Complexes and Oligothienylenevinylene Derivatives by : Chi-ho Kwok (Ph. D.)
Download or read book Design and Synthesis of Functionalized Alkynylplatinum (II) Polypyridyl Complexes and Oligothienylenevinylene Derivatives written by Chi-ho Kwok (Ph. D.) and published by . This book was released on 2012 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization and Photophysical Studies of RU(II) Bipyridyl-dithiocarbamate Complexes as Sensitizers for Dye Sensitized Solar Cells by : Zintle Fudo
Download or read book Synthesis, Characterization and Photophysical Studies of RU(II) Bipyridyl-dithiocarbamate Complexes as Sensitizers for Dye Sensitized Solar Cells written by Zintle Fudo and published by . This book was released on 2018 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis of Solar Cell Dyes by : Yasmeen Abdullah Hameed
Download or read book The Synthesis of Solar Cell Dyes written by Yasmeen Abdullah Hameed and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Synthesis of Luminescent Mono- And Dinuclear Platinum(ii) Alkynyl Terpyridine Complexes by : Hoi-Yiu Chan
Download or read book Design and Synthesis of Luminescent Mono- And Dinuclear Platinum(ii) Alkynyl Terpyridine Complexes written by Hoi-Yiu Chan 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, "Design and Synthesis of Luminescent Mono- and Dinuclear Platinum(II) Alkynyl Terpyridine Complexes: From Photophysics to Aggregation and Self-assembly" by Hoi-yiu, Chan, 陳凱耀, 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 MONO- AND DINUCLEAR PLATINUM(II) ALKYNYL TERPYRIDINE COMPLEXES - FROM PHOTOPHYSICS TO AGGREGATION AND SELF-ASSEMBLY submitted by CHAN Hoi Yiu for the degree of Doctor of Philosophy at The University of Hong Kong in August 2006 A series of mononuclear alkynylplatinum(II) terpyridyl complexes, [Pt(trpy)({C{ C} C H )]PF, [Pt(trpy)({C{ C} C H CF -4)]PF, n 6 5 6 n 6 4 3 6 [Pt(trpy)({C{ C} C H CH -4)]PF, and [Pt( Bu trpy)(C{ C C{ C C H )]PF (n = n 6 4 3 6 3 6 5 6 2, 3), have been synthesized. The X-ray crystal structures of the two forms of [Pt(trpy)(C{ C C{ C C H )]PF, [Pt(trpy)(C{ C C{ C C{ C C H CH -4)]PF and 6 5 6 6 4 3 6 [Pt( Bu trpy)(C{ C C{ C C H )]PF have been determined. Dinuclear and 3 6 5 6 trinuclear alkynylplatinum(II) terpyridyl complexes, [1,4- {Pt(trpy)C{ C} C H ](OTf), [1,4-{Pt( Bu trpy)C{ C} C H ](OTf), [2,5- 2 6 4 2 3 2 6 4 2 {Pt(trpy)C{ C} C H S](OTf), [2,5-{Pt( Bu trpy)C{ C} C H S](OTf) and [1,3,5- 2 4 2 2 3 2 4 2 2 {Pt( Bu trpy)C{ C} C H ](OTf) have been successfully synthesized. The X-ray 3 3 6 3 3t crystal structure of [1,4-{Pt( Bu trpy)C{ C} C H ](OTf) has also been 3 2 6 4 2 determined. The luminescence properties of these complexes have been studied and their lowest-lying excited states in fluid solution and in the glass state were tentatively assigned as admixture of MLCT [dS (Pt)ĺ S *(trpy)] and LLCT [S (C{ C)ĺ S *(trpy)] origin, whereas the low-energy emissions in the solid state were attributed to triplet metal metal-to-ligand charge transfer ( MMLCT) phosphorescence, resulting from significant Pt---Pt interactions in the solid state. Besides, a series of luminescent platinum(II) terpyridyl alkynyl complexes with different counter anions, [Pt(trpy)(C{ C C{ C H)]X (X = OTf, PF, ClO, 6 4 BF, BPh ), [Pt(trpy)(C{ C C H )]X (X = OTf, PF, ClO, BF ) and 4 4 6 5 6 4 4 complexes with various substituents on the alkynyl and terpyridyl ligands, [Pt(trpy)(C{ CC H OCH-4)]OTf, [Pt(4'-CH O trpy)(C{ C C H )]OTf, 6 4 3 3 6 5 [Pt( Bu trpy)(C{ C C{ CH)]OTf, [Pt(trpy)(C{ CC H {CH NMe }-4)](OTf), 3 6 4 2 3 2 [Pt(trpy)(C{ C C{ C CH NMe )](OTf) and [Pt(trpy)(C{ C C{ C CH OH)]OTf 2 3 2 2 have been synthesized and their photophysical properties have been stuided. The X-ray crystal structure of [Pt(trpy)(C{ C C H )]ClO and 6 5 4 [Pt( Bu trpy)(C{ C C{ C H)]OTf have been determined. The solid-state absorption and emission spectra showed low-energy bands, which were assigned as derived from MMLCT origin. Solvent-induced aggregation studies of these complexes in solution showed that the color of the aggregates could be very different for different counter-ions, indicating that counter-ions played an important role in governing the degree of aggregation and the extent of interactions within these aggregates. Addition of various anions to solutions of [Pt(trpy)(C{ C C{ C H)]X (X = OTf, PF ) produced anion-induced color 6changes upon solvent-induced aggregation, showing that these complexes might serve as potential colorimetric anion probes. The effect of temperature on the aggregation properties of the complexes has also been explored. New low-energy absorption and emission bands were found upon a reduction of temperature, attributable to the formation o
Book Synopsis Ruthenium-Containing Polymers by : Ulrich S. Schubert
Download or read book Ruthenium-Containing Polymers written by Ulrich S. Schubert and published by Springer Nature. This book was released on 2021-06-17 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the synthetic methodologies as well as the properties and potential usage of various ruthenium-containing materials. Starting from the first examples of 'ruthenopolymers' reported in the 1970s to the 3D architectures now synthesized, these materials have shown their importance far beyond fundamental polymer science. As well as highlighting the remarkable properties and versatile applications, this book also addresses a key question related to the applications of such heavy-metal-containing materials from the perspective of achieving a sustainable future. This book is of interest to both materials scientists and chemists in academia and industry.
Book Synopsis Design and Synthesis of Core-modified Porphyrin Sensitizers for Dye-sensitized Solar Cells by : Sandeep Baruwahan Mane
Download or read book Design and Synthesis of Core-modified Porphyrin Sensitizers for Dye-sensitized Solar Cells written by Sandeep Baruwahan Mane and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Organic Ligands and the Corresponding Ru Dyes for Dye-Sensitized Solar Cells by : Baharak Bakhshaei
Download or read book Synthesis and Characterization of Organic Ligands and the Corresponding Ru Dyes for Dye-Sensitized Solar Cells written by Baharak Bakhshaei and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemistry in Action: Making Molecular Movies with Ultrafast Electron Diffraction and Data Science by : Lai Chung Liu
Download or read book Chemistry in Action: Making Molecular Movies with Ultrafast Electron Diffraction and Data Science written by Lai Chung Liu and published by Springer Nature. This book was released on 2020-09-10 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis provides the necessary experimental and analytical tools to unambiguously observe the atomically resolved chemical reactions. A great challenge of modern science has been to directly observe atomic motions during structural transitions, and while this was first achieved through a major advance in electron source brightness, the information content was still limited and new methods for image reconstruction using femtosecond electron diffraction methods were needed. One particular challenge lay in reconciling the innumerable possible nuclear configurations with the observation of chemical reaction mechanisms that reproducibly give the same kind of chemistry for large classes of molecules. The author shows that there is a simple solution that occurs during barrier crossing in which the highly anharmonic potential at that point in nuclear rearrangements couples high- and low-frequency vibrational modes to give highly localized nuclear motions, reducing hundreds of potential degrees of freedom to just a few key modes. Specific examples are given in this thesis, including two photoinduced phase transitions in an organic system, a ring closure reaction, and two direct observations of nuclear reorganization driven by spin transitions. The emerging field of structural dynamics promises to change the way we think about the physics of chemistry and this thesis provides tools to make it happen.
Book Synopsis Functional Metallosupramolecular Materials by : John George Hardy
Download or read book Functional Metallosupramolecular Materials written by John George Hardy and published by Royal Society of Chemistry. This book was released on 2015-07-13 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is great interest in metallosupramolecular materials because of their use in magnetic, photonic and electronic materials. Functional Metallosupramolecular Materials focuses on the applications of these materials covering the chemistry underlying the synthesis of a variety of ligands to coordinate various metal ions and the generation of 2D and 3D materials based on these constructs. The book starts by looking at different metallosupramolecular systems including naturally occurring functional metallosupramolecular materials; DNA-based metallosupramolecular materials; metallopolymers; metallogels as well as functional materials based on MOFs. Subsequent chapters then systematically cover the different applications such as molecular computation, spin-crossover, light harvesting and as photocatalysts for the production of solar fuels. The book provides an overview of functional metallosupramolecular materials that will be of interest to graduate students, academics and industrial chemists interested in supramolecular chemistry, materials science and the materials applications.
Book Synopsis Interfacial Engineering in Functional Materials for Dye-Sensitized Solar Cells by : Alagarsamy Pandikumar
Download or read book Interfacial Engineering in Functional Materials for Dye-Sensitized Solar Cells written by Alagarsamy Pandikumar and published by John Wiley & Sons. This book was released on 2019-10-30 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers an Interdisciplinary approach to the engineering of functional materials for efficient solar cell technology Written by a collection of experts in the field of solar cell technology, this book focuses on the engineering of a variety of functional materials for improving photoanode efficiency of dye-sensitized solar cells (DSSC). The first two chapters describe operation principles of DSSC, charge transfer dynamics, as well as challenges and solutions for improving DSSCs. The remaining chapters focus on interfacial engineering of functional materials at the photoanode surface to create greater output efficiency. Interfacial Engineering in Functional Materials for Dye-Sensitized Solar Cells begins by introducing readers to the history, configuration, components, and working principles of DSSC It then goes on to cover both nanoarchitectures and light scattering materials as photoanode. Function of compact (blocking) layer in the photoanode and of TiCl4 post-treatment in the photoanode are examined at next. Next two chapters look at photoanode function of doped semiconductors and binary semiconductor metal oxides. Other chapters consider nanocomposites, namely, plasmonic nanocomposites, carbon nanotube based nanocomposites, graphene based nanocomposites, and graphite carbon nitride based nanocompositesas photoanodes. The book: Provides comprehensive coverage of the fundamentals through the applications of DSSC Encompasses topics on various functional materials for DSSC technology Focuses on the novel design and application of materials in DSSC, to develop more efficient renewable energy sources Is useful for material scientists, engineers, physicists, and chemists interested in functional materials for the design of efficient solar cells Interfacial Engineering in Functional Materials for Dye-Sensitized Solar Cells will be of great benefit to graduate students, researchers and engineers, who work in the multi-disciplinary areas of material science, engineering, physics, and chemistry.
Book Synopsis Development of Solar Cells by : Juganta K. Roy
Download or read book Development of Solar Cells written by Juganta K. Roy and published by Springer Nature. This book was released on 2021-05-12 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview of the fundamental concept, design, working protocols, and diverse photo-chemicals aspects of different solar cell systems with promising prospects, using computational and experimental techniques. It presents and demonstrates the art of designing and developing various solar cell systems through practical examples. Compared to most existing books in the market, which usually analyze existing solar cell approaches this volume provides a more comprehensive view on the field. Thus, it offers an in-depth discussion of the basic concepts of solar cell design and their development, leading to higher power conversion efficiencies. The book will appeal to readers who are interested in both fundamental and application-oriented research while it will also be an excellent tool for graduates, researchers, and professionals working in the field of photovoltaics and solar cell systems.
Book Synopsis Highly Efficient OLEDs by : Hartmut Yersin
Download or read book Highly Efficient OLEDs written by Hartmut Yersin and published by John Wiley & Sons. This book was released on 2019-01-04 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dieses Fachbuch eines Pioniers in diesem schnell wachsenden Fachbereich fasst die jüngsten Erkenntnisse zur Optimierung von OLEDs zusammen. Die Theorie wird ausführlich beschrieben, ebenso verschiedene organische und anorganische emittierende Materialien, Display- und Lichtanwendungen.
Download or read book Anion Sensing written by Eric V. Anslyn and published by Springer Science & Business Media. This book was released on 2005-05-06 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: with contributions by numerous experts
Book Synopsis Metallo-Supramolecular Polymers by : Masayoshi Higuchi
Download or read book Metallo-Supramolecular Polymers written by Masayoshi Higuchi and published by Springer Nature. This book was released on 2019-11-12 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the synthesis, electrochemical and photochemical properties, and device applications of metallo-supramolecular polymers, new kinds of polymers synthesized by the complexation of metal ions and organic ditopic ligands. Their electrochemical and photochemical properties are also interesting and much different from conventional organic polymers. The properties come from the electronic intra-chain interaction between the metal ions and the ligands in the polymer chain. In this book, for example, the electrochromism that the Fe(II)-based metallo-supramolecular polymer exhibits is described: the blue color of the polymer film disappears by the electrochemical oxidation of Fe(II) ions to Fe(III) and the colorless film becomes blue again by the electrochemical reduction of Fe(III) to Fe(II). The electrochromism is explained by the disappearance/appearance of the metal-to-ligand charge transfer absorption. The electrochromic properties are applicable to display devices such as electronic paper and smart windows.
