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Controlling And Tuning The Photoinduced Electron Transfer In Porphyrin Fullerene Dyads By Chemical Linkers
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Book Synopsis Controlling and Tuning the Photoinduced Electron Transfer in Porphyrin-fullerene Dyads by Chemical Linkers by : Vladimir Chukharev
Download or read book Controlling and Tuning the Photoinduced Electron Transfer in Porphyrin-fullerene Dyads by Chemical Linkers written by Vladimir Chukharev and published by . This book was released on 2005 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photoinduced Electron Transfer in Porphyrin-fullerene and Phytochlorin-fullerene Dyads by : Visa Vehmanen
Download or read book Photoinduced Electron Transfer in Porphyrin-fullerene and Phytochlorin-fullerene Dyads written by Visa Vehmanen and published by . This book was released on 2002 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photophysical Characterization of a Series of Self-assembled Donor-acceptor Dyads Containing Porphyrin and N-confused Porphyrin Electron Donors and Studies of the Tautomerization of N-confused Porphyrins by : Jojo Joseph (Chemist)
Download or read book Photophysical Characterization of a Series of Self-assembled Donor-acceptor Dyads Containing Porphyrin and N-confused Porphyrin Electron Donors and Studies of the Tautomerization of N-confused Porphyrins written by Jojo Joseph (Chemist) and published by . This book was released on 2013 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interactions such as pi-pi stacking in organic pi-systems, proton coupling, and hydrogen bonding can be utilized to prepare nanostructures with excellent mechanical and electronic properties. In particular, self-assembled donor-acceptor complexes have received much recent attention because of their potential applications in optoelectronics such as photovoltaic cells and organic light emitting diodes. Porphyrins and their derivatives have been extensively used as building blocks for nanomaterials because of their optical, electronic, catalytic and biochemical properties. The pi-pi stacking and metal coordination ability of porphyrins make them very suitable for the formation of self-assembled structures. The first part of this work involves the photophysical characterization of self-assembled donor-acceptor complexes, where porphyrin derivatives are used as electron donors together with electron acceptors such as naphthalene diimide, perylene diimide, or fullerenes. In the second part, the tautomerization of N-confused tetraphenylporphyrin in various solvents was probed using time-resolved fluorescence spectroscopy.The first part of the work described here is the photophysical characterization of a self-assembled chiral bolaamphiphiles comprised of central tetraphenylporphyrin (H2TPP) with naphthalenediimide (NDI)-lysine moieties flanked on both ends. The strong intermolecular pi-pi interactions between the H2TPP and NDI chromophores leads to the formation of monolayer rings which further stack to form self-assembled nanorods. The effect of local nanostructure of assemblies on the photophysical properties was probed using steady-state fluorescence, time-resolved fluorescence and femtosecond transient absorption spectroscopic studies. This work demonstrates the importance of controlling local nanostructure in modulating the photophysical properties of optoelectronic materials. The second project involves the photophysical characterization of self-assembled donor-acceptor complexes containing an H2TPP and NDI-lysine amphiphile. Strong intermolecular pi-pi interactions between the TPP and NDI chromophores, together with the proton transfer from the lysine head group to the porphyrin ring leads to self-assembly in chloroform. Photoinduced electron transfer in the nanorods was probed using steady state fluorescence, time-resolved fluorescence and femtosecond transient absorption spectroscopic studies. The third portion of this dissertation involves the photophysical characterization of donor-acceptor systems containing covalently bound porphyrin-fullerene dyads, where different numbers (1-4) of C60-fullerenes were attached to a porphyrin core to enhance electron transfer efficiency. In this work, the fluorescence quantum yield measurements, time-resolved fluorescence and femtosecond transient absorption spectroscopic studies were used to study electron-transfer from the porphyrin core to the fullerene group(s). The fourth project involved studies of the equilibrium of the two tautomers of N-confused tetraphenylporphyrins (NCTPP). The steady-state absorption and fluorescence spectra of NCTPP have been found to significantly depend on the nature of the solvent. The previously reported photophysical studies indicated that both NCTPP tautomers can coexist in certain solvents, presumably in equilibrium with one another, while other solvents exclusively prefer one tautomer or the other. In order to gain a better understanding of the NCTPP tautomerization, NCTPP was studied by time-resolved fluorescence spectroscopy in a series of solvents having different solvent parameters. Also examined in this work was the origin of a moderately strong excited state solvent isotope effect in both steady-state and dynamic measurements. In the final project, the spectroscopic properties of a novel self-assembled ZnNCTPP-PDI traid were examined. Donor-acceptor dyads using H2TPP have been examined for years, but studies of D-A dyads based on NCTPP have not been significantly explored. In this project a non-covalently linked D-A complex formed from a zinc N-confused tetraphenylporphyrin dimer [(ZnNCTPP)2] and a pyridyl substituted perylenediimide (Py-PDI-Py) were examined. The coordination of pyridyl group on the PDI with zinc results in the dissociation of the (ZnNCTPP)2 dimer and results in the formation of a ZnNCTPP-Py-PDI-Py-ZnNCTPP triad. Steady-state and time-resolved fluorescence measurements were performed to probe the formation of the triad as well as photoinduced electron transfer in this traid.
Book Synopsis The Porphyrin Handbook: Electron transfer by : Karl M. Kadish
Download or read book The Porphyrin Handbook: Electron transfer written by Karl M. Kadish and published by . This book was released on 2000 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tuning Election Transfer Reactions by Selective Excitation in Porphyrin-Acceptor Assemblies by : Mikael Andersson
Download or read book Tuning Election Transfer Reactions by Selective Excitation in Porphyrin-Acceptor Assemblies written by Mikael Andersson and published by . This book was released on 2000 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dyadic and Triadic Porphyrin Monomers for Electropolymerization and Pyrazine-containing Architectures for Solar Energy Harvesting and Mediating Photoinduced Electron Transfer by : Brian Lyndon Watson
Download or read book Dyadic and Triadic Porphyrin Monomers for Electropolymerization and Pyrazine-containing Architectures for Solar Energy Harvesting and Mediating Photoinduced Electron Transfer written by Brian Lyndon Watson and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural photosynthesis dedicates specific proteins to achieve the modular division of the essential roles of solar energy harvesting, charge separation and carrier transport within natural photosynthesis. The modern understanding of the fundamental photochemistry by which natural photosynthesis operates is well advanced and solution state mimics of the key photochemical processes have been reported previously. All of the early events in natural photosynthesis responsible for the conversion of solar energy to electric potential energy occur within proteins and phospholipid membranes that act as scaffolds for arranging the active chromophores. Accordingly, for creating artificial photovoltaic (PV) systems, scaffolds are required to imbue structure to the systems. An approach to incorporating modular design into solid-state organic mimics of the natural system is presented together with how conductive scaffolds can be utilized in organic PV systems. To support the chromophore arrays present within this design and to extract separated charges from within the structure, linear pyrazine-containing molecular ribbons were chosen as candidates for forming conductive linear scaffolds that could be functionalized orthogonally to the linear axis. A series of donor-wire-acceptor (D-W-A) compounds employing porphyrins as the donors and a C60 fullerene adduct as the acceptors have been synthesized for studying the ability of the pyrazine-containing hetero-aromatic wires to mediate photoinduced electron transfer between the porphyrin donor and fullerene acceptor. Appropriate substitutions were made and the necessary model compounds useful for dissecting the complex photochemistry that the series is expected to display were also synthesized. A dye was synthesized using a pyrazine-containing heteroaromatic spacer that features two porphyrin chromophores. The dye dramatically outperforms the control dye featuring the same porphyrin and a simple benzoic acid linker. A novel, highly soluble 6+kDa extended phthalocyanine was also synthesized and exhibits absorption out to 900nm. The extensive functionalization of the extended phthalocyanine core with dodecyl groups enabled purification and characterization of an otherwise insoluble entity. Finally, in the interest of incorporating modular design into plastic solar cells, a series of porphyrin-containing monomers have been synthesized that are intended to form dyadic and triadic molecular-heterojunction polymers with dedicated hole and electron transport pathways during electrochemical polymerization.
Book Synopsis Photoinduced Electron Transfer in Porphyrin-based Supramolecular Systems by : James Andell Hutchison
Download or read book Photoinduced Electron Transfer in Porphyrin-based Supramolecular Systems written by James Andell Hutchison and published by . This book was released on 2006 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis N4-Macrocyclic Metal Complexes by : J.H. Zagal
Download or read book N4-Macrocyclic Metal Complexes written by J.H. Zagal and published by Springer Science & Business Media. This book was released on 2007-07-16 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to significant developments in sensor science and technology, this book offers insight into the various extended applications and developments of N4 macrocycle complexes in biomimetic electrocatalysis. Chapters are devoted to the chemistry, electronic and electrochemical properties of porphyrin- based polymetallated supramolecular redox catalysts and their applications in analytical and photoelectrochemical molecular devices; the use of porphyrins, phthalocyanines and related complexes as electrocatalysts for the detection of a wide variety of environmentally polluting and biologically relevant molecules; and the use of electropolymerized metalloporphyrin and metallophthalocyanine films as powerful materials for analytical tools, especially for sensing biologically relevant species.
Author :Electrochemical Society. Fullerenes Group Publisher :The Electrochemical Society ISBN 13 :9781566772761 Total Pages :292 pages Book Rating :4.7/5 (727 download)
Book Synopsis Functionalized Fullerenes by : Electrochemical Society. Fullerenes Group
Download or read book Functionalized Fullerenes written by Electrochemical Society. Fullerenes Group and published by The Electrochemical Society. This book was released on 2000 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Supramolecular Chemistry - Fundamentals and Applications by : Katsuhiko Ariga
Download or read book Supramolecular Chemistry - Fundamentals and Applications written by Katsuhiko Ariga and published by Springer Science & Business Media. This book was released on 2006-08-02 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamentals of "supramolecular chemistry" to the latest developments on the subject are covered by this book. It sets out to explain the topic in a relatively easy way. The basic concepts of molecular recognition chemistry are included. Molecules with fascinating shapes and functions such as fullerenes, carbon nanotubes, dendrimers, rotaxane, and catenane, and molecular assemblies are also explained. Thereafter applications of supermolecules to nanotechnology are introduced with many examples of molecular devices. The last part of the book describes biological supermolecules and their mimics. Though simply explained undergraduate and graduate students in Chemistry will be able to use aspects of this work as an advanced textbook.
Book Synopsis Azobenzene-Containing Materials by : Almeria Natansohn
Download or read book Azobenzene-Containing Materials written by Almeria Natansohn and published by Wiley-VCH. This book was released on 1999-06-24 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Azobenzene is an unusual "regular" molecule with fascinating possibilities and endless surprises. The mono- and multilayer behavior of azobenzene-containing materials, the photoinduced motion, and the possibility of massive material displacement well below the glass transition temperature open yet new avenues of research and applications. This book contains oral and poster presentations of the symposium "Azobenzene-Containing materials" held at Boston ACS Fall Meeting 1998. It will help people understand why is this subject so fascinating and it will attract even more researchers to the area.
Book Synopsis Intramolecular Charge Transfer by : Ramprasad Misra
Download or read book Intramolecular Charge Transfer written by Ramprasad Misra and published by John Wiley & Sons. This book was released on 2018-02-27 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridging the gap between the multitude of advanced research articles and the knowledge newcomers to the field are looking for, this is a timely and comprehensive monograph covering the interdisciplinary topic of intramolecular charge transfer (ICT). The book not only covers the fundamentals and physico-chemical background of the ICT process, but also places a special emphasis on the latest experimental and theoretical studies that have been undertaken to understand this process and discusses key technological applications. After outlining the discovery of ICT molecules, the authors go on to discuss several important substance classes. They present the latest techniques for studying the underlying processes and show the interplay between charge transfer and the surrounding medium. Examples taken from nonlinear optics, viscosity and polarity sensors, and organic electronics testify to the vast range of applications. The result is a unique information source for experimentalists as well as theoreticians, from postgraduate students to researchers.
Download or read book Singlet Oxygen written by Santi Nonell and published by Royal Society of Chemistry. This book was released on 2016-01-27 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meeting the desire for a comprehensive book that collects and curates the vast amount of knowledge gained in the field of singlet oxygen, this title covers the physical, chemical and biological properties of this reactive oxygen species and also its increasingly important applications across chemical, environmental and biomedical areas.The editors have a long and distinguished background in the field of singlet oxygen chemistry and biomedical applications, giving them a unique insight and ensuring the contributions attain the highest scientific level.The book provides an up to date reference resource for both the beginner and experienced researcher and crucially for those working across disciplines such as photochemistry, photobiology and photomedicine.
Book Synopsis Campanian Foraminifera from the Stanford University Campus, California by : Joseph John Graham
Download or read book Campanian Foraminifera from the Stanford University Campus, California written by Joseph John Graham and published by . This book was released on 1963 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanoscience written by P John Thomas and published by Royal Society of Chemistry. This book was released on 2017-08-08 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of nanoscience continues to grow at an impressive rate and, with such a vast landscape of material, careful distillation of the most important discoveries will help researchers find the key information they require. Nanoscience Volume 4 provides a critical and comprehensive assessment of the most recent research and opinion from across the globe. Coverage includes diverse topics such as 2D nanomaterials, quantum dot solar cells and core nanoparticles for drug delivery applications. Anyone practising in any nano-allied field, or wishing to enter the nano-world will benefit from this resource, presenting the current thought and applications of nanoscience.
Book Synopsis Principles and Applications of Photochemistry by : Brian Wardle
Download or read book Principles and Applications of Photochemistry written by Brian Wardle and published by John Wiley & Sons. This book was released on 2009-11-06 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern introduction to photochemistry covering the principles and applications of this topic from both a physical chemistry and organic chemistry angle. Coverage ranges from subjects such as lasers, the atmosphere, biochemistry, medicine and industry and also includes the latest developments in relation to photochemical molecular machines, photodynamic therapy applied to cancer, photochromatic imaging, and photostabilizers. Little in the way of prior knowledge is assumed, and the reader is aided by numerous worked examples, learning objectives, chapter summaries and problems.
Book Synopsis Multiporphyrin Arrays by : Dongho Kim
Download or read book Multiporphyrin Arrays written by Dongho Kim and published by CRC Press. This book was released on 2012-01-12 with total page 817 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive review of the fundamentals and applications of multiporphyrin arrays ranging from basic spectroscopic features to a wide range of promising applications such as molecular wires, switches, sensors, artificial photosynthetic devices, and dye-sensitized solar cells based on a variety of multiporphyrin architectures u
