Spectroscopy Of Molecular Excitons
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Spectroscopy Of Molecular Excitons
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Author : Vladimir L. Broude
language : en
Publisher: Springer
Release Date : 1985
Spectroscopy Of Molecular Excitons written by Vladimir L. Broude and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Science categories.
Low-temperature spectroscopy of organic molecular crystals came into being in the late 20s, just when quantum physics of solids as a whole began to de velop vigorously. Already in the early works, two experimental facts of prime importance were discovered: the presence of a multitude of narrow bands in the low-temperature spectrum of a crystal, and a close relationship between the spectrum of the crystal and that of the constituent molecules. These findings immediately preceded the celebrated paper of Frenkel in which he went beyond the framework of Bloch's scheme and advanced the exciton concept. Subsequent investigations showed that the most interesting features of the spectra of molecular crystals are associated with excitons, and then the spectroscopy of molecular excitons began to form gradually on the basis of the spectroscopy of organic crystals. The molecular exciton became synonymous to the Frenkel exciton in a molecular crystal. In view of the difficulties involved in the analysis of rich spectra con taining many tens of bands, the spectroscopy of molecular crystals had long been connected most closely with the spectroscopy of molecules. It had deve loped independently, to a large extent, from the other branches of solid state physics. This was also emphasized by the difference in experimental techniques, the specific properties of the objects, etc. As a result, there was some lag in ideas and concepts.
Spectroscopy Of Molecular Excitons
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Author : Vladimir L. Broude
language : en
Publisher: Springer
Release Date : 1985-09-01
Spectroscopy Of Molecular Excitons written by Vladimir L. Broude and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-09-01 with Technology & Engineering categories.
Low-temperature spectroscopy of organic molecular crystals came into being in the late 20s, just when quantum physics of solids as a whole began to de velop vigorously. Already in the early works, two experimental facts of prime importance were discovered: the presence of a multitude of narrow bands in the low-temperature spectrum of a crystal, and a close relationship between the spectrum of the crystal and that of the constituent molecules. These findings immediately preceded the celebrated paper of Frenkel in which he went beyond the framework of Bloch's scheme and advanced the exciton concept. Subsequent investigations showed that the most interesting features of the spectra of molecular crystals are associated with excitons, and then the spectroscopy of molecular excitons began to form gradually on the basis of the spectroscopy of organic crystals. The molecular exciton became synonymous to the Frenkel exciton in a molecular crystal. In view of the difficulties involved in the analysis of rich spectra con taining many tens of bands, the spectroscopy of molecular crystals had long been connected most closely with the spectroscopy of molecules. It had deve loped independently, to a large extent, from the other branches of solid state physics. This was also emphasized by the difference in experimental techniques, the specific properties of the objects, etc. As a result, there was some lag in ideas and concepts.
Dynamics Of Molecular Excitons
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Author : Seogjoo J. Jang
language : en
Publisher: Elsevier
Release Date : 2020-04-25
Dynamics Of Molecular Excitons written by Seogjoo J. Jang and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-25 with Science categories.
Dynamics of Molecular Excitons provides a comprehensive, but concise description of major theories on the dynamics of molecular excitons, intended to serve as a self-contained resource on the topic. Designed to help those new to this area gain proficiency in this field, experts will also find the book useful in developing a deeper understanding of the subject. The starting point of the book is the standard microscopic definition of molecular Hamiltonians presented in commonly accepted modern quantum mechanical notations. Major assumptions and approximations involved in constructing Frenkel-type exciton Hamiltonians, which are well established, but are often hidden under arcane notations and approximations of old publications, are presented in detail. This will help quantum chemists understand the major assumptions involved in the definition of commonly used exciton models. Rate theories of exciton dynamics, such as Förster and Dexter theories and their modern generalizations, are presented in a unified and detailed manner. In addition, important aspects that are often neglected, such as local field effect and the role of fluctuating environments, are discussed. Various quantum dynamics methods allowing coherent dynamics of excitons are presented in a systematic manner in the context of quantum master equations or path integral formalisms. The author also provides a detailed theoretical explanation for the major spectroscopic techniques probing exciton dynamics, including modern two-dimensional electronic spectroscopy, with a critical assessment of the implications of these spectroscopic measurements. Finally, the book includes a brief overview of major applications including an explanation of organic photovoltaic materials and natural light harvesting complexes. Covers major theories of exciton dynamics in a consciously concise and easily readable way Bridges the gap between quantum dynamics working with phenomenological exciton Hamiltonian and quantum chemistry construct reliable models amenable for dynamics calculations from ab initio calculations Explores modern nonlinear electronic spectroscopy techniques to probe exciton dynamics, showing how it is applied
Spectroscopy Of The Excited State
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Author : Baldassare Di Bartolo
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Spectroscopy Of The Excited State written by Baldassare Di Bartolo and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
These proceedings report the lectures and seminars presented at the NATO Advanced Study Institute on "The Spectroscopy of the Excited State," held at Erice, Italy, June 9-24, 1975. This Institute was an activity of the International School of Atomic and Molecular Spectroscopy of the "Ettore Majorana" Centre for Scientific Culture. The Institute consisted of a series of lectures on the spectroscopic properties of materials in excited electronic states, that, starting at a fundamental level, finally reached the current level of research. The sequence of lectures and the organization of the material taught were in keeping with a didac tical presentation. In essence the course had the two-fold pur pose of organizing what was known on the subject, and updating the knowledge in the field. The formal lectures were complemented by seminars whose abstracts are also included in these proceedings. The proceedings report also the contributions sent by Professors R.G.W. Norrish and S. C1aesson who, unfortunately, were not able to come because of illness. A total of 62 participants and 7 lecturers came from the following countries: Belgium, Canada, Czechoslovakia, France, Germany, Israel, Italy, Japan, Netherlands, Norway, Pakistan, Poland, Sweden, Switzerland, the United Kingdom, the United States and Venezuela. The secretaries of the course were: A. La Francesca for the administrative aspects of the meeting and P.Papagiannakopou10s for the scientific aspects of the meeting.
Theory Of Molecular Excitons
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Author : A. Davydov
language : en
Publisher: Springer
Release Date : 2013-11-11
Theory Of Molecular Excitons written by A. Davydov and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Science categories.
Primary Photoexcitations In Conjugated Polymers Molecular Exciton Versus Semiconductor Band Model
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Author : Niyasi Serdar Sariciftci
language : en
Publisher: World Scientific
Release Date : 1998-01-02
Primary Photoexcitations In Conjugated Polymers Molecular Exciton Versus Semiconductor Band Model written by Niyasi Serdar Sariciftci and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-01-02 with Science categories.
This volume concentrates on the controversy within the scientific community over how to explain, understand and describe the photophysics/photochemistry of this class of materials. This controvery is of such a fundamental nature that the solution of the problem might be in a unification of the semiconductor and metal physics with the molecular quantum chemistry. Thus, a wide-ranging and comprehensive discussion of this very crucial issue has not been written down yet. This volume brings together the most prominent scientists specializing in this controversial topic. Each contributor addresses the opponents' arguments. After short introductory chapters, the contributors discuss their own speciality area and compare the results with both models and explain their position on why one of the models is more appropriate. Special emphasis is given to comparative discussions with other conjugated molecular systems as well as inorganic semiconductors. Contents:Correlations in Conjugated Polymers (Z G Soos et al.)Nature of the Primary Photo-Excitations in Poly(Arylene-Vinylenes): Bound Neutral Excitons or Charged Polaron Pairs (A J Heeger)Excitons in Conjugated Polymers (H Bässler)Intramolecular Excitons and Intermolecular Polaron Pairs as Primary Photoexcitations in Conjugated Polymers (E Conwell)Excitonic Effects in the Linear and Nonlinear Optical Properties of Conjugated Polymers (S Abe)Bound Polaron Pair Formation in Poly(Phenylenevinylenes) (L Rothberg)Luminescence Efficiency and Time-Dependence: Insights into the Nature of the Emitting Species in Conjugated Polymers (I D W Samuel et al.)Mechanism of Carrier Generation in the Class of Low Mobility Materials: Transient Photoconductivity and Photoluminescence at High Electric Fields (D Moses)Photoluminescence Spectroscopy as a Probe for Disorder and Excitonic Effects in Organic and Inorganic Semiconductors (U Lemmer & E O Göbel)Spectroscopy on Conjugated Polymer Devices (V Dyakonov)Spin-Dependent Recombination Processes in π-Conjugated Polymers (P A Lane et al.)Electroabsorption Spectroscopy on π-Conjugated Polymers (G Weiser & Á Horváth)The Role of Excitons in Charge Carrier Production in Polysilanes (R G Kepler & Z G Soos)Theory of Excitons and Biexcitons in π-Conjugated Polymers (S Mazumdar & M Chandross)Ultrafast Relaxation in Conjugated Polymers (T Kobayashi)Are Bipolarons Photogenerated in PPV? (E Conwell)Do Bipolarons Exist in Doped or Photoirradiated Conjugated Polymers? — An Analysis Based on Studies of Model Compounds (Y Furukawa)Photoexcitations in Conjugated Oligomers (R A J Janssen)Excited States in Poly(Paraphenylenevinylene) and Related Oligomers: Theoretical Investigation of Their Relation to Electrical and Optical Properties (D Beljonne et al.)Ultrafast Photoinduced Absorption in Nondegenerate Ground-State Conjugated Polymers: Signatures of Excited States (D W McBranch & M B Sinclair) Readership: Researchers and graduate students in the field of physics and chemistry of conjugated, conducting polymers and physical chemistry. keywords:
Molecular Spectroscopy Xi
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Author : O. Sild
language : en
Publisher: Elsevier
Release Date : 2017-01-31
Molecular Spectroscopy Xi written by O. Sild and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-31 with Science categories.
Molecular Spectroscopy–XI provides information pertinent to the fundamental aspects of molecular spectroscopy. This book discusses the modifications of molecular spectra when the density varies as a function of temperature and pressure. Organized into 15 chapters, this book begins with an overview of the several processes concerning triplet excitons leading to magnetic-field sensitive luminescence in organic crystals and related compounds. This text then examines the methods of investigation of the exciton band structures in molecular crystals. Other chapters consider the conditions for the equivalence of Fourier spectroscopy and of slow passage experiments in nuclear magnetic resonance. This book discusses as well the application of computer technology in carbon-13 magnetic resonance spectroscopy. The final chapter deals with the application of high-resolution proton and carbon-13 n.m.r. spectroscopy for the investigation of the molecular conformations in proteins. This book is a valuable resource for organic chemists, biologists, microbiologists, scientists, and research workers.
Spectroscopy And Excitation Dynamics Of Condensed Molecular Systems
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Author : Vladimir Moiseevich Agranovich
language : en
Publisher: North-Holland
Release Date : 1983
Spectroscopy And Excitation Dynamics Of Condensed Molecular Systems written by Vladimir Moiseevich Agranovich and has been published by North-Holland this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Science categories.
Spectroscopy Of Molecular Excitons
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Author : Vladimir L. Broude
language : en
Publisher: Springer
Release Date : 2012-04-09
Spectroscopy Of Molecular Excitons written by Vladimir L. Broude and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-04-09 with Technology & Engineering categories.
Low-temperature spectroscopy of organic molecular crystals came into being in the late 20s, just when quantum physics of solids as a whole began to de velop vigorously. Already in the early works, two experimental facts of prime importance were discovered: the presence of a multitude of narrow bands in the low-temperature spectrum of a crystal, and a close relationship between the spectrum of the crystal and that of the constituent molecules. These findings immediately preceded the celebrated paper of Frenkel in which he went beyond the framework of Bloch's scheme and advanced the exciton concept. Subsequent investigations showed that the most interesting features of the spectra of molecular crystals are associated with excitons, and then the spectroscopy of molecular excitons began to form gradually on the basis of the spectroscopy of organic crystals. The molecular exciton became synonymous to the Frenkel exciton in a molecular crystal. In view of the difficulties involved in the analysis of rich spectra con taining many tens of bands, the spectroscopy of molecular crystals had long been connected most closely with the spectroscopy of molecules. It had deve loped independently, to a large extent, from the other branches of solid state physics. This was also emphasized by the difference in experimental techniques, the specific properties of the objects, etc. As a result, there was some lag in ideas and concepts.
Spectroscopy Of Excitons In Semiconductor Quantum Dot Molecules
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Author : Gerhard Ortner
language : en
Publisher:
Release Date : 2004
Spectroscopy Of Excitons In Semiconductor Quantum Dot Molecules written by Gerhard Ortner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Exciton theory categories.