Spin Dynamics In Radical Pairs

Author : Alan Lewis
Publisher : Unknown
Page : 128 pages
File Size : 40,7 Mb
Release : 2018
Category : Electrons
ISBN : 3030006875

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Spin Dynamics in Radical Pairs by Alan Lewis Pdf

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).

Author : Alan Lewis
Publisher : Springer
Page : 156 pages
File Size : 44,8 Mb
Release : 2018-09-12
Category : Science
ISBN : 9783030006860

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Spin Dynamics in Radical Pairs by Alan Lewis Pdf

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).

Author : Amit Agarwal
Publisher : Springer Science & Business
Page : 354 pages
File Size : 50,9 Mb
Release : 2014-04-23
Category : Science
ISBN : 9783319062723

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Simulation Studies of Recombination Kinetics and Spin Dynamics in Radiation Chemistry by Amit Agarwal Pdf

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.

Author : Anders Lund,Masaru Shiotani
Publisher : Springer Science & Business Media
Page : 498 pages
File Size : 53,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401137508

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Radical Ionic Systems by Anders Lund,Masaru Shiotani Pdf

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.

Author : Douglas C. Neckers,David H. Volman,Günther von Bünau
Publisher : John Wiley & Sons
Page : 378 pages
File Size : 50,5 Mb
Release : 2009-09-24
Category : Science
ISBN : 9780470133811

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Advances in Photochemistry, Volume 23 by Douglas C. Neckers,David H. Volman,Günther von Bünau Pdf

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

Author : Anatoly L. Buchachenko,Eugene L. Frankevich
Publisher : John Wiley & Sons
Page : 200 pages
File Size : 43,8 Mb
Release : 1996-12-17
Category : Science
ISBN : 047118859X

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Chemical Generation and Reception of Radio-and Microwaves by Anatoly L. Buchachenko,Eugene L. Frankevich Pdf

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.

Author : Zerong Wang,Uta Wille,Eusebio Juaristi
Publisher : John Wiley & Sons
Page : 4542 pages
File Size : 41,9 Mb
Release : 2017-04-17
Category : Science
ISBN : 9781118470459

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Encyclopedia of Physical Organic Chemistry, 6 Volume Set by Zerong Wang,Uta Wille,Eusebio Juaristi Pdf

Winner of 2018 PROSE Award for MULTIVOLUME REFERENCE/SCIENCE This encyclopedia offers a comprehensive and easy reference to physical organic chemistry (POC) methodology and techniques. It puts POC, a classical and fundamental discipline of chemistry, into the context of modern and dynamic fields like biochemical processes, materials science, and molecular electronics. Covers basic terms and theories into organic reactions and mechanisms, molecular designs and syntheses, tools and experimental techniques, and applications and future directions Includes coverage of green chemistry and polymerization reactions Reviews different strategies for molecular design and synthesis of functional molecules Discusses computational methods, software packages, and more than 34 kinds of spectroscopies and techniques for studying structures and mechanisms Explores applications in areas from biology to materials science The Encyclopedia of Physical Organic Chemistry has won the 2018 PROSE Award for MULTIVOLUME REFERENCE/SCIENCE. The PROSE Awards recognize the best books, journals and digital content produced by professional and scholarly publishers. Submissions are reviewed by a panel of 18 judges that includes editors, academics, publishers and research librarians who evaluate each work for its contribution to professional and scholarly publishing. You can find out more at: proseawards.com Also available as an online edition for your library, for more details visit Wiley Online Library

Author : Ilia A. Solov'yov,Alexey V. Verkhovtsev,Andrei V. Korol,Andrey V. Solov'yov
Publisher : Springer Nature
Page : 554 pages
File Size : 46,9 Mb
Release : 2022-06-03
Category : Science
ISBN : 9783030992910

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Dynamics of Systems on the Nanoscale by Ilia A. Solov'yov,Alexey V. Verkhovtsev,Andrei V. Korol,Andrey V. Solov'yov Pdf

This book presents the structure formation and dynamics of animate and inanimate matter on the nanometre scale. This is a new interdisciplinary field known as Meso-Bio-Nano (MBN) science that lies at the intersection of physics, chemistry, biology and material science. Special attention in the book is devoted to investigations of the structure, properties and dynamics of complex MBN systems by means of photonic, electronic, heavy particle and atomic collisions. This includes problems of fusion and fission, fragmentation, surfaces and interfaces, reactivity, nanoscale phase and morphological transitions, irradiation-driven transformations of complex molecular systems, collective electron excitations, radiation damage and biodamage, channeling phenomena and many more. Emphasis in the book is placed on the theoretical and computational physics research advances in these areas and related state-of-the-art experiments. Particular attention in the book is devoted to the utilization of advanced computational techniques and high-performance computing in studies of the dynamics of systems.

Author : Seung Hwan Ko
Publisher : BoD – Books on Demand
Page : 336 pages
File Size : 51,5 Mb
Release : 2011-07-27
Category : Technology & Engineering
ISBN : 9789533072739

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Organic Light Emitting Diode by Seung Hwan Ko Pdf

This book contains a collection of latest research developments on Organic light emitting diodes (OLED). It is a promising new research area that has received a lot of attention in recent years. Here you will find interesting reports on cutting-edge science and technology related to materials, fabrication processes, and real device applications of OLEDs. I hope that the book will lead to systematization of OLED study, creation of new research field and further promotion of OLED technology for the bright future of our society.

Author : Masoud Mohseni,Yasser Omar,Gregory S. Engel,Martin B. Plenio
Publisher : Cambridge University Press
Page : 421 pages
File Size : 50,6 Mb
Release : 2014-08-07
Category : Science
ISBN : 9781107010802

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Quantum Effects in Biology by Masoud Mohseni,Yasser Omar,Gregory S. Engel,Martin B. Plenio Pdf

Explores the role of quantum mechanics in biology for advanced undergraduate and graduate students in physics, biology and chemistry.

Author : Shoogo Ueno,Tsukasa Shigemitsu
Publisher : CRC Press
Page : 347 pages
File Size : 51,8 Mb
Release : 2022-06-16
Category : Science
ISBN : 9781000584806

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Bioelectromagnetism by Shoogo Ueno,Tsukasa Shigemitsu Pdf

Bioelectromagnetism has been gradually developing and expanding into a variety of fields in engineering, biomedical engineering, life science, medicine and biology. Bioelectromagnetism: History, Foundations and Applications provides an overview of the field and its developments; from its inception and growth through the twenty-first century, to the latest advances in electro- and magnetobiology and hazard evaluations of electromagnetic fields. It is organized into three sections, each focusing on specific regions of bioelectromagnetism. It begins with the foundations of the field and its history, with a chronological treatment of the major subjects in bioelectromagnetism. The relationship between atmospheric electromagnetic phenomena, geomagnetism and biological systems are presented. It then discusses the many benefits of bioelectromagnetism: electroreception, magnetic navigation, magnetic sense and magnetic responses of plants, birds, animals and humans. It then moves on to human health issues and the impact of bioelectromagnetism. It also provides practical guidance on how to set safety guidelines. Finally, it looks forward to the future prospects of the field based on the latest research in the field. In exploring both the history of the field and the latest developments in today’s research advances, this book provides a comprehensive and self-contained treatment on the subject, which will be a valuable reference for researchers in biophysics, medicine, electrical engineering and biomedical engineering. It can be used as a companion to the editor’s previously published books: Biomagnetics: Principles and Applications of Biomagnetic Stimulation and Imaging (9781482239201, 2016, CRC Press); and Bioimaging: Imaging by Light and Electromagnetics in Medicine and Biology (9780367203047, 2020, CRC Press). Key Features: Provides both a historical view of the field, along with the latest developments in the field Contains practical guidance for researchers on how to set safety guidelines for those working in the area Edited by authorities in the field, with chapter contributions from specialists

Author : Igor Lacković,Darko Vasic
Publisher : Springer
Page : 1035 pages
File Size : 43,6 Mb
Release : 2014-09-02
Category : Technology & Engineering
ISBN : 9783319111285

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6th European Conference of the International Federation for Medical and Biological Engineering by Igor Lacković,Darko Vasic Pdf

This volume presents the Proceedings of the 6th European Conference of the International Federation for Medical and Biological Engineering (MBEC2014), held in Dubrovnik September 7 – 11, 2014. The general theme of MBEC 2014 is "Towards new horizons in biomedical engineering" The scientific discussions in these conference proceedings include the following themes: - Biomedical Signal Processing - Biomedical Imaging and Image Processing - Biosensors and Bioinstrumentation - Bio-Micro/Nano Technologies - Biomaterials - Biomechanics, Robotics and Minimally Invasive Surgery - Cardiovascular, Respiratory and Endocrine Systems Engineering - Neural and Rehabilitation Engineering - Molecular, Cellular and Tissue Engineering - Bioinformatics and Computational Biology - Clinical Engineering and Health Technology Assessment - Health Informatics, E-Health and Telemedicine - Biomedical Engineering Education

Author : Christopher Elisha Dunn Chidsey
Publisher : Unknown
Page : 426 pages
File Size : 53,7 Mb
Release : 1983
Category : Nuclear spin
ISBN : STANFORD:36105032048642

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Electron Transfer and Spin Dynamics in Photosynthetic Reaction Centers by Christopher Elisha Dunn Chidsey Pdf

Author : G A Webb
Publisher : Royal Society of Chemistry
Page : 586 pages
File Size : 47,6 Mb
Release : 2007-10-31
Category : Science
ISBN : 9781847553881

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Nuclear Magnetic Resonance by G A Webb Pdf

As a spectroscopic method, Nuclear Magnetic Resonance (NMR) has seen spectacular growth over the past two decades, both as a technique and in its applications. Today the applications of NMR span a wide range of scientific disciplines, from physics to biology to medicine. Each volume of Nuclear Magnetic Resonance comprises a combination of annual and biennial reports which together provide comprehensive of the literature on this topic. This Specialist Periodical Report reflects the growing volume of published work involving NMR techniques and applications, in particular NMR of natural macromolecules which is covered in two reports: "NMR of Proteins and Acids" and "NMR of Carbohydrates, Lipids and Membranes". For those wanting to become rapidly acquainted with specific areas of NMR, this title provides unrivalled scope of coverage. Seasoned practitioners of NMR will find this an in valuable source of current methods and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.

Author : Malcolm D. Forbes
Publisher : John Wiley & Sons
Page : 300 pages
File Size : 49,8 Mb
Release : 2010-01-22
Category : Science
ISBN : 0470584106

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Carbon-Centered Free Radicals and Radical Cations by Malcolm D. Forbes Pdf

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.