Download or read book Charge Transfer Processes Across Organic written by Hsiao-Chu Lin and published by . This book was released on 2013 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Charge transfer efficiency at organic/electrode interfaces affects the performance organic photovoltaics (OPVs). It is hypothesized that the charge collection efficiency at organic/electrode interfaces is influenced by the structure of the first molecular layer adjacent to the electrode surface. Two differently oriented monolayers composed of two phosphonic acid (PA) functionalized zinc phthalocyanine (ZnPc) molecules, one with four PAs attached peripherally (ZnPcPA4), one at each quadrant, and another that is functionalized with one PA (ZnPcPA), were tethered to indium tin oxide (ITO) surfaces as models for the donor/transparent conducting oxide (TCO) interface in OPVs to address the relationship between molecular orientation and electron transfer kinetics across the organic/ITO interface. The electron transfer rate constants across the monolayer/ITO interface were measured using potential modulated attenuated total reflectance (PM-ATR) spectroscopy in TE and TM polarizations, which allows rate constants to be determined for subpopulations of molecules that are oriented predominately in-plane and out-of-plane, respectively. The templating effect of the tethered monolayer on sequential layers of donor material for ZnPcPA and ZnPcPA4 monolayers was assessed by depositing a few layers of CuPc on ZnPcPA- and ZnPcPA4-modified ITO. The performance of OPV devices fabricated on ITO modified with these two monolayers was compared and correlated to their orientation and energy alignments with other layers in the devices. The dependence of kinetics of electron transfer on overpotential was studied using monolayer-tethered ZnPcPA on ITO. Measurements of apparent heterogeneous electron transfer rate constants (kapp) as a function of applied potential across the ZnPcPA/ITO interface were acquired using PM-ATR at various dc biases (Edc). With varying Edc imposed on the electrode, the fraction of adsorbed molecules in reduced or oxidized states is changed, and both the energetics and kinetics of the electrode reaction are affected. The results were discussed and compared to theoretical predictions. The photoinduced charge harvesting and photocurrent generation were assessed using a clicked ZnPc-perylene diimide (PDI) donor-acceptor assembly tethered to ITO via a PA anchoring group. This ZnPc-PDI donor-acceptor assembly was used to investigate the mechanism of photoinduced charge transfer and hole-capture by ITO in the presence of a solution phase redox mediator.

Download or read book Handbook of Materials Modeling written by Sidney Yip and published by Springer Science & Business Media. This book was released on 2007-11-17 with total page 2903 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first reference of its kind in the rapidly emerging field of computational approachs to materials research, this is a compendium of perspective-providing and topical articles written to inform students and non-specialists of the current status and capabilities of modelling and simulation. From the standpoint of methodology, the development follows a multiscale approach with emphasis on electronic-structure, atomistic, and mesoscale methods, as well as mathematical analysis and rate processes. Basic models are treated across traditional disciplines, not only in the discussion of methods but also in chapters on crystal defects, microstructure, fluids, polymers and soft matter. Written by authors who are actively participating in the current development, this collection of 150 articles has the breadth and depth to be a major contributor toward defining the field of computational materials. In addition, there are 40 commentaries by highly respected researchers, presenting various views that should interest the future generations of the community. Subject Editors: Martin Bazant, MIT; Bruce Boghosian, Tufts University; Richard Catlow, Royal Institution; Long-Qing Chen, Pennsylvania State University; William Curtin, Brown University; Tomas Diaz de la Rubia, Lawrence Livermore National Laboratory; Nicolas Hadjiconstantinou, MIT; Mark F. Horstemeyer, Mississippi State University; Efthimios Kaxiras, Harvard University; L. Mahadevan, Harvard University; Dimitrios Maroudas, University of Massachusetts; Nicola Marzari, MIT; Horia Metiu, University of California Santa Barbara; Gregory C. Rutledge, MIT; David J. Srolovitz, Princeton University; Bernhardt L. Trout, MIT; Dieter Wolf, Argonne National Laboratory.

Download or read book Intramolecular Charge Transfer written by Ramprasad Misra and published by John Wiley & Sons. This book was released on 2018-03-07 with total page 256 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 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 Charge and Energy Transfer Dynamics in Molecular Systems written by Volkhard May and published by John Wiley & Sons. This book was released on 2023-06-06 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: Charge and Energy Transfer Dynamics in Molecular Systems Comprehensive resource offering knowledge on charge and energy transfer dynamics in molecular systems and nanostructures Charge and Energy Transfer Dynamics in Molecular Systems provides a unified description of different charge and energy transfer phenomena in molecular systems with emphasis on the theory, bridging the regimes of coherent and dissipative dynamics and thus presenting classic rate theories as well as modern treatments of ultrafast phenomena. Starting from microscopic models, the common features of the different transfer processes are highlighted, along with applications ranging from vibrational energy flow in large polyatomic molecules, the motion of protons in solution, up to the concerted dynamics of electronic and nuclear degrees of freedom in molecules and molecular aggregates. The newly revised and updated Fourth Edition contains a more detailed coverage of recent developments in density matrix theory, mixed quantum-classical methods for dynamics simulations, and a substantially expanded treatment of time-resolved spectroscopy. The book is written in an easy-to-follow style, including detailed mathematical derivations, thus making even complex concepts understandable and applicable. Charge and Energy Transfer Dynamics in Molecular Systems includes information on: Electronic and vibrational molecular states, covering molecular Schrödinger equation, Born—Oppenheimer separation and approximation, Hartree-Fock equations and other electronic structure methods Dynamics of isolated and open quantum systems, covering multidimensional wave packet dynamics, and different variants of density operator equations Interaction of molecular systems with radiation fields, covering linear and nonlinear optical response using the correlation function approach Intramolecular electronic transitions, covering optical transition and internal conversion processes Transfer processes of electrons, protons, and electronic excitation energy Providing in-depth coverage of the subject, Charge and Energy Transfer Dynamics in Molecular Systems is an essential resource for anyone working on timely problems of energy and charge transfer in physics, chemistry and biophysics as well as for all engaged in nanoscience and organic electronics.

Download or read book Charge Transfer Processes in Condensed Media written by J. Ulstrup and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecules in liquid and solid media are exposed to strong inter action forces from the surrounding medium. The formulation of a comprehensive theory of chemical processes in condensed media is consequently an elaborate task involving concepts from several areas of the natural sciences. Within the las~ two and a half decades very notable results towards the formulation of a 'unified' quantum mechanical theory of such processes have in fact been achieved, and by the variety of physical, chemical, and biological processes which can be suitably covered by this framework, the new theory represents an adequate alternative to the transition state theory. The present work has a two-fold purpose. Firstly, to provide a reasonably organized exposition of some basic aspects of these developments. This part emphasizes the fundamental similarities between chemical and other kinds of radiationless processes and includes the derivation of the most important rate expressions without resorting to involved mathematical techniques. The s- ond major purpose is to illustrate the 'unified' character of the rate theory by analysis of a considerable amount of expe- mental data from both 'conventional' kinetics and from such untraditional areas as low-temperature, strongly exothermic, and biological processes. Particular attention is here given to those systems for which a classical description is inadequate, and which provide a diagnostic distinction between several alternative theoretical approaches.

Download or read book Charge Transfer in Physics Chemistry and Biology written by A.M. Kuznetrsov and published by CRC Press. This book was released on 2020-09-23 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the various processes of charge transfer in physics, chemistry and biology and shows the similarities and differences between them. It focuses on the physical mechanisms of the elementary processes to demonstrate their common physical nature.

Download or read book Biological Aspects of Electrochemistry written by Milazzo and published by Birkhäuser. This book was released on 2013-11-21 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electron Transfer Reactions in Organic Chemistry written by Lennart Eberson and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of the book is electron transfer reactions in organic chemistry, with the emphasis on mechanistic aspects. The theoretical framework is that of the Marcus theory, well-known from its extensive use in inorganic chemistry. The book deals with definitions of electron transfer, theory of electron transfer reactions (Marcus' and Pross-Shaik's approach) experimental diagnosis of electron transfer reactions, examples from inorganic/organic reactants and purely organic reactants, electro- and photochemical electron transfer, electron transfer catalyzed reactions, connections between electron transfer and polar mechanisms, and applications of electron transfer, such as electrosynthesis of organic chemicals, photochemical energy storage, conducting organic materials and chemiluminescence. The approach is new in so far as no comparable book has been published. The book will be of value to anyone interested in keeping track of developments in physical organic chemistry.

Download or read book Solar Cells Based on Colloidal Nanocrystals written by Holger Borchert and published by Springer Science & Business Media. This book was released on 2014-04-01 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a new system of solar cells. Colloidal nanocrystals possess many physical and chemical properties which can be manipulated by advanced control over structural features like the particle size. One application field is photovoltaics where colloidal semiconductor nanocrystals are explored as components of photo-active layers which can be produced from liquid media, often in combination with conductive polymers. The further development of this interdisciplinary field of research requires a deep understanding of the physics and chemistry of colloidal nanocrystals, conducting polymers and photovoltaic devices. This book aims at bridging gaps between the involved scientific disciplines and presents important fundamentals and the current state of research of relevant materials and different types of nanoparticle-based solar cells. The book will be of interest to researchers and PhD students. Moreover, it may also serve to accompany specialized lectures in related areas.

Download or read book Chemical Control of Charge Trapping and Charge Transfer Processes at the Organic Inorganic Interface Within Quantum Dot Organic Complexes written by and published by . This book was released on 2015 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the research program funded through the Early Career Research Award we designed complexes of colloidal semiconductor quantum dots (QDs) and organic molecules in which the interfacial chemistry controls the electronic structure and dynamics of the excitonic state of the QD. The program included two main projects; (1) investigation of the mechanisms by which organic surfactants control the quantum confinement of excitonic charge carriers; and (2) development of models for electron transfer between QDs and adsorbed molecules as a function of interfacial chemistry. This project was extremely successful in that our achievements in those two areas addressed the great majority of questions we outlined in the original proposal and answered questions I did not think to ask in that original proposal. Our work led to the discovery of "exciton delocalizing ligands", which change the electronic structure of colloidal semiconductor nanocrystals by altering, with small synthetic modifications to their surfaces, their most defining characteristic - the quantum confinement of their excited states. It also led to detailed, quantitative descriptions of how the surface chemistry of a QD dictates, thermodynamically and kinetically, the probability of exchange of electrons between the QD and a small molecule. We used two of the three major techniques in the proposal (transient photoluminescence and transient absorption). Electrogenerated chemiluminescence was also proposed, but was too technically difficult with these systems to be useful. Instead, NMR spectroscopy emerged as a major analytical tool in our studies. With the fundamental advancements we made with this project, we believe that we can design QDs to be the next great class of visible-light photocatalysts.

Download or read book Contemporary Catalysis written by Julian R.H. Ross and published by Elsevier. This book was released on 2018-11-16 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contemporary Catalysis: Fundamentals and Current Applications deals with the fundamentals and modern practical applications of catalysis. Topics addressed include historical development and the importance of heterogeneous catalysis in the modern world, surfaces and adsorption, the catalyst (preparation and characterization), the reactor (integral and differential reactors, etc.), and an introduction to spectroscopic and thermal characterization techniques. Building on this foundation, the book continues with chapters on important industrial processes, potential processes and separate chapters on syngas production, Fischer Tropsch synthesis, petroleum refining, environmental protection, and biomass conversion. Contemporary Catalysis is an essential resource for chemists, physical chemists, and chemical engineers, as well as graduate and post graduate students in catalysis and reaction engineering. Covers all aspects of catalysis in a carefully organized text Includes material on historical development Provides a wide range of student tasks, case studies, and supplementary, web-based materials that are regularly updated

Download or read book Charge Transfer Organic Photoelectrochemistry written by Katarzyna Rybicka-Jasińska and published by American Chemical Society. This book was released on 2023-12-08 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: At first glance, the theories behind charge transfer and organic photoelectrocatalysis do not seem to have much in common. It turns out, however, that to carry out an effective organic synthesis using photoelectrocatalysis one needs a solid theoretical foundation in charge transfer, which is the topic of this primer. First, the authors introduce the theoretical foundation of charge transfer, focusing on electron transfer and hole transfer and how they relate to photochemistry and electrochemistry. Then, the authors move into applications of photoelectrochemistry in organic synthesis. A series of examples demonstrate the three types of synthetic photoelectrochemistry that have emerged in recent years.

Download or read book Charge Transfer in DNA written by Hans-Achim Wagenknecht and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past few years have witnessed intense research in this fascinating field as well as many controversial discussions. Now the time is ripe for a comprehensive book covering not only theoretical aspects, but also such mechanistic topics as principles and mechanisms of photoinduced charge injection, transport and trapping in DNA, sequence-dependent DNA dynamics, spectroscopic investigations of hole transport and much more. From the contents: * Principles and Mechanisms of Photoinduced Charge Injection, Transport and Trapping in DNA * Sequence-Dependent DNA Dynamics: The Regulator of DNA-Mediated Charge Transport * Excess Electron Transfer in DNA Probed with Flavin and Thymine Dimer Modified Oligonucleotides * Dynamics of Photoinitiated Hole and Electron Injection in Duplex DNA * Spectroscopic Investigation of Oxidative Hole Transfer via Adenine Hopping in DNA * Chemical Probing of Reductive Electron Transfer in DNA * Chemical Approach for Modulating Hole Transport in DNA * Spectroscopic Investigation of Charge Transfer in DNA * Spectroscopic Probing of Ultrafast Structural Relaxation and Electron Transfer Dynamics in DNA Edited by Hans-Achim Wagenknecht, and written by renowned international authors, this book provides an excellent overview with high quality contributions, making it a "must-have" for everyone working in the field.

Download or read book Biophysical Chemistry written by C. Kalidas and published by Springer Nature. This book was released on 2023-08-13 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: The textbook is intended for the undergraduate and postgraduate students of chemistry, biology and medicine. It covers diverse topics of biophysical chemistry ranging from the structure of cells, lipids, and proteins to nonequilibrium thermodynamics, enzyme catalysis, and fast reaction kinetics. The book discusses the fundamental structural concepts in the first part and provides a systematic account of different experimental techniques such as chromatography, electrophoresis, and gel filtration that are extensively employed in biochemical research in the second part. It also includes typical applications using NMR, ESR, and SPR to comprehend the power of spectroscopic tools in biophysical chemistry. This textbook also deals with advanced topics of entropy production and biosensors. It consists of a large number of schematic diagrams as well as tabular compilations of kinetic, electrochemical, and thermochemical data. It includes multiple-choice questions, numerical examples, and descriptive questions in various chapters to aid self-learning among students. In view of the diverse coverage of topics, this textbook is a valuable asset to undergraduate and postgraduate students. It is also a useful reference for researchers and professionals in chemistry, biology, and medicine.

Download or read book Organic Electronics written by Stephen R. Forrest and published by Oxford University Press, USA. This book was released on 2020 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides a basic understanding of the principles of the field of organic electronics through to their applications in organic devices. Useful for the student and practitioner, it is both a teaching text and a resource that is a jumping-off point for learning, working and innovating in this rapidly growing field.--Provided by publisher.

Download or read book Molecular and Laser Spectroscopy written by V.P. Gupta and published by Elsevier. This book was released on 2022-08-21 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular and Laser Spectroscopy, Advances and Applications: Volume 3 gives students and researchers an up-to-date understanding of the fast-developing area of molecular and laser spectroscopy. This book covers basic principles and advances in several conventional as well as new and upcoming areas of molecular and laser spectroscopy. This third volume is an extension of the two previous volumes of the same title and includes all-new topics. Each chapter is devoted to a particular fast-growing area of research and fills the gap between elementary texts and advanced material found in research articles. Some of the topics covered include: terahertz spectroscopy and its applications in health care· linear and non-linear vibrational optical activity spectroscopy; cascade laser IR-spectroscopy and frequency comb techniques; step-scan infrared spectroscopy (absorption and emission) for detecting reaction intermediates· surface-enhanced (SERS) and tip-enhanced (TERS) Raman scattering; infrared and Raman micro-spectroscopy; time-resolved linear and non-linear infrared spectroscopy using pico-second and femtosecond lasers. The spectroscopic techniques have been applied to medical sciences, forensics, security, material science, agriculture, food, chemical, pharmaceutical and petrochemical industries and used to study molecular vibrational dynamics, and hydrogen bonding in ground and excited states. This book serves as a valuable resource for students, teachers, and beginning researchers engaged in the area of molecular and laser spectroscopy. On account of the wide range of applications, researchers and scientific personnel in many industries will find this book useful for learning about the latest techniques and putting them to practical use. Written by eminent research scientists having an intricate knowledge of the latest activities in the field Includes exhaustive lists of research articles, reviews, and books at the end of each chapter to aid in further pursuit of research activity Uses illustrative examples of the varied applications to provide a practical guide to those interested in using molecular and laser spectroscopy tools in their research Each chapter is written in simple, clear language and develops its topic systematically, from basics to the latest developments and future projections