Download or read book Design Synthesis and Optoelectronic Properties of Strongly Coupled Porphyrin Based Donor acceptor Systems written by Harry Tetsuo Uyeda and published by . This book was released on 2002 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optoelectronic Properties Ground and Excited State Dynamics and Synthesis of Strongly Coupled Porphyrin based Donor acceptor Systems written by Steven M. LeCours and published by . This book was released on 1996 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Synthesis Spectroscopy and Photophysical Behavior of Highly Coupled Porphyrin Donor acceptor Systems written by Naomi P. Redmore and published by . This book was released on 2002 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2002 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Synthesis Spectroscopy and Hammett Correlation Analysis of Heteroarylethynyl Donor acceptor Porphyrin Systems for Electrooptic Applications written by Tiangao Zhang and published by . This book was released on 2003 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Spectroscopy Solution Structural Characterization and Electron Transfer Kinetics of Systems Designed to Probe Donor acceptor Electronic Coupling Modulated by Stacked Aromatic Residues Separated by Less Than the Sums of Their Van Der Waals Radii written by Peter M. Iovine and published by . This book was released on 2000 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book The Porphyrin Handbook Volume 1 written by Karl Kadish and published by Elsevier. This book was released on 2000 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists in such fields as mathematics, physics, chemistry, biochemistry, biology, and medicine are currently involved in investigations of porphyrins and their numerous analogues and derivatives. Porphyrins are being used as platforms for the study of theoretical principles, as catalysts, as drugs, as electronic devices, and as spectroscopic probes in biology and medicine. The need for an up-to-date and authoritative treatise on the porphyrin system has met with universal acclaim amongst scientists and investigators.
Download or read book International Women of Supramolecular Chemistry written by Jennifer Hiscock and published by Frontiers Media SA. This book was released on 2022-03-17 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Porphyrin Handbook Volume 8 written by Karl Kadish and published by Elsevier. This book was released on 2000 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists in such fields as mathematics, physics, chemistry, biochemistry, biology, and medicine are currently involved in investigations of porphyrins and their numerous analogues and derivatives. Porphyrins are being used as platforms for the study of theoretical principles, as catalysts, as drugs, as electronic devices, and as spectroscopic probes in biology and medicine. The need for an up-to-date and authoritative treatise on the porphyrin system has met with universal acclaim amongst scientists and investigators.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Covalent Organic Frameworks written by Atsushi Nagai and published by CRC Press. This book was released on 2019-12-19 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rational synthesis of extended arrays of organic matter in bulk, solution, crystals, and thin films has always been a paramount goal of chemistry. The classical synthetic tools to obtain long-range regularity are, however, limited to noncovalent interactions, which usually yield structurally more random products. Hence, a combination of porosity and regularity in organic covalently bonded materials requires not only the design of molecular building blocks that allow for growth into a nonperturbed, regular geometry but also a condensation mechanism that progresses under reversible, thermodynamic, self-optimizing conditions. Covalent organic frameworks (COFs), a variety of 2D crystalline porous materials composed of light elements, resemble an sp2-carbon-based graphene sheet but have a different molecular skeleton formed by orderly linkage of building blocks to constitute a flat organic sheet. COFs have attracted considerable attention in the past decade because of their versatile applications in gas storage and separation, catalysis, sensing, drug delivery, and optoelectronic materials development. Compared to other porous materials, COFs allow for atomically precise control of their architectures by changing the structure of their building blocks, whereby the shapes and sizes of their pores can be well-tuned. Covalent Organic Frameworks is a compilation of different topics in COF research, from COF design and synthesis, crystallization, and structural linkages to the theory of gas sorption and various applications of COFs, such as heterogeneous catalysts, energy storage (e.g., semiconductors and batteries), and biomedicine. This handbook will appeal to anyone interested in nanotechnology and new materials of gas adsorption and storage, heterogeneous catalysts, electronic devices, and biomedical devices.
Download or read book Organic Optoelectronic Materials written by Yongfang Li and published by Springer. This book was released on 2015-05-30 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume reviews the latest trends in organic optoelectronic materials. Each comprehensive chapter allows graduate students and newcomers to the field to grasp the basics, whilst also ensuring that they have the most up-to-date overview of the latest research. Topics include: organic conductors and semiconductors; conducting polymers and conjugated polymer semiconductors, as well as their applications in organic field-effect-transistors; organic light-emitting diodes; and organic photovoltaics and transparent conducting electrodes. The molecular structures, synthesis methods, physicochemical and optoelectronic properties of the organic optoelectronic materials are also introduced and described in detail. The authors also elucidate the structures and working mechanisms of organic optoelectronic devices and outline fundamental scientific problems and future research directions. This volume is invaluable to all those interested in organic optoelectronic materials.
Download or read book Synthesis and Applications of Nanocarbons written by Jean-Charles Arnault and published by John Wiley & Sons. This book was released on 2020-08-28 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: A crucial overview of the cutting-edge in nanocarbon research and applications In Synthesis and Applications of Nanocarbons, the distinguished authors have set out to discuss fundamental topics, synthetic approaches, materials challenges, and various applications of this rapidly developing technology. Nanocarbons have recently emerged as a promising material for chemical, energy, environmental, and medical applications because of their unique chemical properties and their rich surface chemistries. This book is the latest entry in the Wiley book series Nanocarbon Chemistry and Interfaces and seeks to comprehensively address many of the newly surfacing areas of controversy and development in the field. This book introduces foundational concepts in nanocarbon technology, hybrids, and applications, while also covering the most recent and cutting-edge developments in this area of study. Synthesis and Applications of Nanocarbons addresses new discoveries in the field, including: · Nanodiamonds · Onion-like carbons · Carbon nanotubes · Fullerenes · Carbon dots · Carbon fibers · Graphene · Aerographite This book provides a transversal view of the various nanocarbon materials and hybrids and helps to share knowledge between the communities of each material and hybrid type.
Download or read book Synthetic Applications written by Rajender S. Varma and published by Walter de Gruyter GmbH & Co KG. This book was released on 2022-05-09 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic nanocatalysts are becoming an important tool for greener catalytic processes in chemical transformations in view of the ease of their removal from a reaction medium. This book explores assorted magnetic nanocatalysts, their deployment in synthesis, chemical transformation and their recovery and reuse. Various thematic topics embodied include magnetic nanocatalysts for S-S bond formation, N-heterocycle formation, C-heteroatom bond formation, silica-supported catalysts, multicomponent reactions, including their recyclability; another available volume emphasizes the utility of magnetic nanocatalysts in industrial appliances.
Download or read book Electrogenerated Chemiluminescence written by Allen J. Bard and published by CRC Press. This book was released on 2004-07-20 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first source on this expanding analytical science, this reference explores advances in the instrumentation, design, and application of techniques with electrogenerated chemiluminescence (ECL), examining the use and impact of ECL-based assays in clinical diagnostics, life science research, environmental testing, food and water evaluation, and th
