Spin Dynamics In Radical Pairs
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Spin Dynamics In Radical Pairs
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Author : Alan Lewis
language : en
Publisher:
Release Date : 2018
Spin Dynamics In Radical Pairs written by Alan Lewis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Electrons categories.
This book sheds new light on the dynamical behaviour of electron spins in molecules containing two unpaired electrons (i.e. a radical pair). The quantum dynamics of these spins are made complicated by the interaction between the electrons and the many nuclear spins of the molecule; they are intractable using analytical techniques, and a naïve numerical diagonalization is not remotely possible using current computational resources. Hence, this book presents a new method for obtaining the exact quantum-mechanical dynamics of radical pairs with a modest number of nuclear spins. Readers will learn how a calculation that would take 13 years using conventional wavepacket propagation can now be done in 1 day, and will also discover a new semiclassical method for approximating the dynamics in the presence of many nuclear spins. The new methods covered in this book are shown to provide significant insights into three topical and diverse areas: charge recombination in molecular wires (which can be used in artificially mimicking photosynthesis), magnetoelectroluminescence in organic light-emitting diodes, and avian magnetoreception (how birds sense the Earth's magnetic field in order to navigate).
Spin Dynamics In Radical Pairs
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Author : Alan Lewis
language : en
Publisher: Springer
Release Date : 2018-09-12
Spin Dynamics In Radical Pairs written by Alan Lewis and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-12 with Science categories.
This book sheds new light on the dynamical behaviour of electron spins in molecules containing two unpaired electrons (i.e. a radical pair). The quantum dynamics of these spins are made complicated by the interaction between the electrons and the many nuclear spins of the molecule; they are intractable using analytical techniques, and a naïve numerical diagonalization is not remotely possible using current computational resources. Hence, this book presents a new method for obtaining the exact quantum-mechanical dynamics of radical pairs with a modest number of nuclear spins. Readers will learn how a calculation that would take 13 years using conventional wavepacket propagation can now be done in 1 day, and will also discover a new semiclassical method for approximating the dynamics in the presence of many nuclear spins. The new methods covered in this book are shown to provide significant insights into three topical and diverse areas: charge recombination in molecular wires (which can be used in artificially mimicking photosynthesis), magnetoelectroluminescence in organic light-emitting diodes, and avian magnetoreception (how birds sense the Earth’s magnetic field in order to navigate).
Simulation Studies Of Recombination Kinetics And Spin Dynamics In Radiation Chemistry
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Author : Amit Agarwal
language : en
Publisher: Springer Science & Business
Release Date : 2014-04-23
Simulation Studies Of Recombination Kinetics And Spin Dynamics In Radiation Chemistry written by Amit Agarwal and has been published by Springer Science & Business this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-23 with Science categories.
Amit Agarwal’s thesis reports a substantial contribution to the microscopic simulation of radiation chemical reactions. In his research Agarwal extends existing models to further understand scavenging, spin and relaxation effects. This research has advanced the development of both the Monte Carlo Random Flights and the Independent Reaction Times (IRT) simulation tools. Particular highlights are the extension of these tools to include both the spin-exchange interaction and spin relaxation, both of which are influential in radiolytic systems where many reactions are spin-controlled. In addition, the study has led to the discovery of a novel correlation of the scavenging rate with the recombination time in low permittivity solvents. This finding goes against existing assumptions underlying the theory of diffusion kinetics while still being accommodated in the IRT method which demonstrates the power of this unconventional approach. The work in this thesis can be applied to a wide number of fields including the nuclear industry, medicine, food treatment, polymer curing, the preparation of nano-colloids, power generation and waste disposal.
Electron Transfer And Spin Dynamics In Photosynthetic Reaction Centers
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Author : Christopher Elisha Dunn Chidsey
language : en
Publisher:
Release Date : 1983
Electron Transfer And Spin Dynamics In Photosynthetic Reaction Centers written by Christopher Elisha Dunn Chidsey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Nuclear spin categories.
Principles Of Electron Spin Resonance
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Author : Neil Manning Atherton
language : en
Publisher: Prentice Hall
Release Date : 1993
Principles Of Electron Spin Resonance written by Neil Manning Atherton and has been published by Prentice Hall this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Medical categories.
Radical Ionic Systems
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Author : Anders Lund
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Radical Ionic Systems written by Anders Lund 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.
It is now more than 20 years since the book "Radical Ions" edited by Kaiser and Kevan appeared. It contained aspects regarding generation, identification, spin density determination and reactivity of charged molecules with an odd number of electrons. New classes of reactive ion radicals have been detected and characterised since then, most notably cation radicals of saturated organic compounds. Trapping of electrons has been found to occur not only in frozen glasses but also in organic crystals. The structure and reactions of anion radicals of saturated compounds have been clarified during the last 20 years. We have asked leading experts in the field to write separate chapters about cation radicals, anion radicals and trapped electrons as well as more complex systems of biological or technological interest. More attention is paid to recent studies of the ions of saturated compounds than to the older and previously reviewed work on aromatic ions. In the case of trapped electrons full coverage is out of the question, and focus is on recent efforts to characterise the solvation structure in ordered and disordered systems.
Reaction Centers Of Photosynthetic Bacteria
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Author : M.-E. Michel-Beyerle
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Reaction Centers Of Photosynthetic Bacteria written by M.-E. Michel-Beyerle 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.
Reaction Centers of Photosynthetic Bacteria is an updated record on the most recent insight into the struc- ture/function relationship of reaction centers from photosynthetic bacteria. It addresses in particular, interactions and dynamics which determine the ultra-high quantum yield of photoinduced charge separation in these energy-transforming molecular machines. Of particular interest is the still controversial issue of the primary charge separation mechanism as well as the effects of well-defined modifications, introduced either by mutagenic replacements in the protein matrix or by chemical exchange of reaction center pigments. Also described are the methods used for the characterization of interactions and dynamics important for electron transfer processes in the reaction center.
Advances In Photochemistry Volume 23
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Author : Douglas C. Neckers
language : en
Publisher: John Wiley & Sons
Release Date : 2009-09-24
Advances In Photochemistry Volume 23 written by Douglas C. Neckers and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-09-24 with Science categories.
Setting the pace for progress and innovation . . . ADVANCES IN PHOTOCHEMISTRY More than a simple survey of the current literature, Advances in Photochemistry offers critical evaluations written by internationally recognized experts. These pioneering scientists offer unique and varied points of view of the existing data. Their articles are challenging as well as provocative and are intended to stimulate discussion, promote further research, and encourage new developments in the field. In this volume Spectroscopy and Photochemistry of Polyatomic Alkaline Earth-Containing Molecules PETER F. BERNATH Photochemically Induced Dynamic Nuclear Polarization MARTIN GOEZ Photophysics of Gaseous Aromatic Molecules: Excess Vibrational Energy Dependence of Radiationless Processes EDWARD C. LIM Lanthanide Complexes of Encapsulating Ligands as Luminescent Devices NANDA SABBATINI, MASSIMO GUARDIGLI, AND ILSE MANET Advances in the Measurement of Correlation in Photoproduct Motion CHRISTOPHER G. MORGAN, MARCEL DRABBELS, AND ALEC M. WODTKE
Chemical Generation And Reception Of Radio And Microwaves
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Author : Anatoly L. Buchachenko
language : en
Publisher: John Wiley & Sons
Release Date : 1996-12-17
Chemical Generation And Reception Of Radio And Microwaves written by Anatoly L. Buchachenko and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-12-17 with Science categories.
With this first critical overview in a decade, two internationally recognized authorities on spin chemistry make an important contribution to this timely topic in chemical physics. Two novel features of chemical reactions are described: The generation o waves by reactions and the effects of the electromagnetic waves on some chemical reactions. In this sense, this treatise formulates chemical radiophysics as a new field of chemical physics. The authors detail physical and chemical reaction mechanisms, the selection of nuclei by spin orientation and magnetic moment, (non)magnetic isotope separation and accumulation in reaction methods. Coverage features new insights into chemical dynamics and reaction mechanisms. Chemical radiophysics offers new radiospectroscopy techniques of exquisite sensitivity. One brief chapter summarizes the physical basis by which electromagnetic fields could affect reactions of biological significance. Chemical Generation and Reception of Radio- and Microwaves is an essential reference for chemical physicists, physical organic chemists, materials scientists, and radio- and biophysicists.
Carbon Centered Free Radicals And Radical Cations
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Author : Malcolm D. Forbes
language : en
Publisher: John Wiley & Sons
Release Date : 2010-01-22
Carbon Centered Free Radicals And Radical Cations written by Malcolm D. Forbes and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-01-22 with Science categories.
Covers the most advanced computational and experimental methods for studying carbon-centered radical intermediates With its focus on the chemistry of carbon-centered radicals and radical cations, this book helps readers fully exploit the synthetic utility of these intermediates in order to prepare fine chemicals and pharmaceutical products. Moreover, it helps readers better understand their role in complex atmospheric reactions and biological systems. Thoroughly up to date, the book highlights the most advanced computational and experimental methods available for studying and using these critically important intermediates. Carbon-Centered Free Radicals and Radical Cations begins with a short history of the field of free radical chemistry, and then covers: A discussion of the relevant theory Mechanistic chemistry, with an emphasis on synthetic utility Molecular structure and mechanism, focusing on computational methods Spectroscopic investigations of radical structure and kinetics, including demonstrations of spin chemistry techniques such as CIDNP and magnetic field effects Free radical chemistry in macromolecules Each chapter, written by one or more leading experts, explains difficult concepts clearly and concisely, with references to facilitate further investigation of individual topics. The authors were selected in order to provide insight into a broad range of topics, including small molecule synthesis, polymer degradation, computational chemistry as well as highly detailed experimental work in the solid, liquid, and gaseous states. This volume is essential for students or researchers interested in building their understanding of the role of carbon-centered radical intermediates in complex systems and how they may be used to develop a broad range of useful products.