Download or read book Mechanisms for the Excitation of Singlet Molecular Oxygen written by G. Marston and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanisms for the Excitation of Singlet Molecular Oxygen written by George Marston (D.Phil.) and published by . This book was released on 1987 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Singlet Molecular Oxygen written by Arthur Paul Schaap and published by Hutchinson Ross Publishing Company. This book was released on 1976 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Singlet Oxygen written by Santi Nonell and published by Royal Society of Chemistry. This book was released on 2016-01-27 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Meeting the desire for a comprehensive book that collects and curates the vast amount of knowledge gained in the field of singlet oxygen, this title covers the physical, chemical and biological properties of this reactive oxygen species and also its increasingly important applications across chemical, environmental and biomedical areas.The editors have a long and distinguished background in the field of singlet oxygen chemistry and biomedical applications, giving them a unique insight and ensuring the contributions attain the highest scientific level.The book provides an up to date reference resource for both the beginner and experienced researcher and crucially for those working across disciplines such as photochemistry, photobiology and photomedicine.
Download or read book Mechanism of Singlet Oxygen Generation by Chemical Reactions written by James K. Hurst and published by . This book was released on 1977 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objectives of the present work are to investigate mechanisms of chemical reactions which give rise to electronically excited molecular oxygen and to determine factors responsible for its deactivation in solution, thereby providing the means for optimization of gaseous singlet oxygen formation by homogeneous reaction. Studies have focused upon hypochlorite oxidation of hydrogen peroxide, this reaction having been shown to yield substantial amounts of singlet molecular oxygen . Inasmuch as the redox kinetics were not well-characterized, we have undertaken a thorough analysis of the rate behavior and reaction stoichiometry. Where tractable, measurement of singlet oxygen yields by the various reaction pathways has been made using chemical trapping agents selective for singlet oxygen.(Author).
Download or read book The Electronic Transitions of Molecular Oxygen written by Mikkel Bregnhøj and published by Springer. This book was released on 2018-12-15 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the fundamentals and the state of the art of the photophysics of molecular oxygen. The author examines optical transitions between the lowest-lying electronic states in molecular oxygen and how these transitions respond to perturbation, either from an organic molecule or from the plasmon field of a metal nanoparticle. We live on a planet filled with light and oxygen. The interaction between these two components forms the basis of excited state chemistry spanning the fields of synthetic organic chemistry, materials chemistry, molecular biology, and photodynamic treatment of cancer. Still, the fundamental ways in which oxygen is affected by light is an active subject of research and is continually being developed and rationalized. In this book, readers will learn that singlet oxygen, the excited state of oxygen that exhibits unique chemical reactivity, can be selectively made via direct optical excitation of oxygen in a sensitizer-free system. Readers will also discover that this approach can perturb living cells differently depending on the singlet oxygen “dose”.
Download or read book An Investigation of Reaction and Quenching Mechanisms of Singlet Molecular Oxygen written by Robert Leo Martin and published by . This book was released on 1972 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Singlet Oxygen Detection and Imaging written by Steffen Hackbarth and published by Springer Nature. This book was released on 2022-05-31 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Singlet Oxygen, the lowest electronically excited state of molecular oxygen, is highly reactive and involved in many chemical and biological processes. It is one major mediator during photosensitization, which has been used by mankind since ancient times, even though the mechanisms behind it were understood only about half a century ago. The combination of high reactivity and very long natural lifetime allows for direct optical detection of singlet oxygen and its interactions using its characteristic phosphorescence at around 1270 nm. Since this emission is very weak, optical detection was technically very challenging for a long time. Therefore, even today, most laboratories only exploit the high reactivity to observe the interaction with sensor molecules, rather than singlet oxygen emission itself. However, in recent years highly sensitive optical detection was developed, the authors being major contributors. This book is dedicated to the detection of singlet oxygen, discussing possibilities, pitfalls and limits of the various methods with a special focus on time-resolved phosphorescence and the kinetics of singlet oxygen generation and decay including involved and related processes, discussing investigated systems with various complexity from solutions over in vitro to in vivo. The long-standing paradigm that singlet oxygen phosphorescence is a benchmark for detection systems rather than an option for process observation is still ubiquitous and this book hopes to contribute in overcoming this still prevailing bias.
Download or read book Molecular Mechanisms Of Oxygen Activation written by Osamu Hayaishi and published by Elsevier. This book was released on 2012-12-02 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Mechanisms of Oxygen Activation reviews some of the major advances that have been made in our understanding of the molecular mechanisms underlying oxygen activation, with emphasis on the role of oxygen activation in contemporary biological processes. The biological role of oxygenases in the metabolism of fatty acids and steroids is discussed, along with the functions of heme-containing dioxygenases, a-ketoglutarate-coupled dioxygenases, and pterin-requiring aromatic amino acid hydroxylases. This book is comprised of 14 chapters and begins with an overview of the general properties and biological functions of oxygenases, along with the chemical aspects of oxygen fixation reactions. The reader is then introduced to research concerning fatty acid and steroid oxygenases which has appeared in the literature since 1962, paying particular attention to the mechanism of oxygenation and the biosynthesis and metabolism of steroids. Subsequent chapters explore the biological functions of a variety of oxygenases such as heme-containing dioxygenases, copper-containing oxygenases, flavoprotein oxygenases, and pterin-requiring aromatic amino acid hydroxylases. Superoxide dismutase, cytochrome c oxidase, peroxidase, and bacterial monoxygenases are also considered. This monograph should serve as a valuable reference for biochemists as well as undergraduate and graduate students of biochemistry.
Download or read book Physical and Chemical Mechanisms in Molecular Radiation Biology written by William A. Glass and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental understanding of the production of biological effects by ionizing radiation may well be one of the most important scientific objectives of mankind; such understanding could lead to the effective and safe utilization of the nuclear energy option. In addition, this knowledge will be of immense value in such diverse fields as radiation therapy and diagnosis and in the space program. To achieve the above stated objective, the U. S. Department of Energy (DOE) and its predecessors embarked upon a fundamental interdisciplinary research program some 35 years ago. A critical component of this program is the Radiological and Chemical Physics Program (RCPP). When the RCPP was established, there was very little basic knowledge in the fields of physics, chemistry, and biology that could be directly applied to understanding the effects of radiation on biological systems. Progress of the RCPP program in its first 15 years was documented in the proceedings of a conference held at Airlie, Virginia, in 1972. At this conference, it was clear that considerable progr:ess had been made in research on the physical and chemical processes in well-characterized systems that could be used to understand biological effects. During this period of time, most physical knowledge was obtained for the gas phase because the technology and instru mentation had not progressed to the point that measurements could be made in liquids more characteristic of biological materials.
Download or read book Understanding and Manipulating Excited State Processes written by V. Ramamurthy and published by CRC Press. This book was released on 2001-08-21 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: A state-of-the-art review of original research, this book includes discussions of intramolecular photoadditoin of nucleophiles, electrophiles, and radical species to the activated aromatic ring; new methods for regio-, anantio-, and diastereoselective photooxygenations involving singlet oxygen mechanisms; and applications of microreactors for photo
Download or read book Chemical and Biological Generation of Excited States written by Waldermar Adam and published by Elsevier. This book was released on 2012-12-02 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical and Biological Generation of Excited States discusses major aspects of chemical and biological generation of electronic excitation. This book is organized into 11 chapters that focus on both chemi- and bioenergized processes. This book first discusses some of the fundamental aspects of the description of excited state behavior in condensed media. It then examines the field of gas-phase dioxetane chemiluminescence both by itself and in relation to solution-phase studies. The presented analysis is based on statistical mechanics and supported by a very simple limiting case calculation. Chapter 4 describes the state-of-the-art of how excitation yields are determined experimentally in chemienergized processes. This is followed by a discussion on activation parameters and stability trends, focusing on solution-phase data. Chapters 6 and 7 examine solution-phase chemiluminescence resulting from high-energy electron-transfer reaction, often involving aromatic radical ions, and the mechanism of excitation step. The next chapters cover the generation of electronic excited states in bioluminescence and the evaluation of luminescent oxidation mechanisms using oxygen tracers. The chapters also explain the formation of electronically excited products in dark biological processes and the mechanism of chemiexcitation as it relates to redox metabolism. Specific examples of biological oxygenation reactions yielding luminescence are also presented. Furthermore, this book discusses the concept and applicability of chemiluminigenic probing for the quantification and differentiation of oxygenation activities in mammalian phagocytes. The concluding chapter is devoted to the possible formation of singlet oxygen in various systems and processes that mimic singlet oxygen reactions. The book intends to attract young scientists as well as established research workers to broaden the horizons of this rapidly growing and potentially very important field.
Download or read book International Conference on Singlet Molecular Oxygen and Its Role in Environmental Sciences written by Anthony M. Trozzolo and published by . This book was released on 1970 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanisms of Atmospheric Oxidation of the Aromatic Hydrocarbons written by Jack G. Calvert and published by Oxford University Press. This book was released on 2002-02-14 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text reviews many of the aspects of the chemistry of the aromatic hydrocarbons and a consensus evaluation of the data by seven of the leading atmospheric scientists. The book covers topics ranging from the relative importance of the compounds in ozone and haze development to methods of estimating elemantary rate coefficients based on structural features of the compounds to mechanisms of aerosol generation and atmostpheric reaction of the polycyclic compounds to photochemical processes. It identifies features of the aromatic hydrocarbons requiring further study and appendicies give the structural formulas and nomenclature of the compounds reviewed in the book.
Download or read book Singlet Molecular Oxygen Mediated Electronic Energy Transfer written by Rex Donal Kenner and published by . This book was released on 1976 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inorganic Reaction Mechanisms written by and published by Academic Press. This book was released on 2017-06-30 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inorganic Reaction Mechanisms, Volume 70 is the latest volume in the Advances in Inorganic Chemistry series that presents timely summaries of current progress in inorganic chemistry, ranging from bio-inorganic to solid state studies. Topics covered in this updated volume include The Kinetics and Mechanism of Complex Redox Reactions in Aqueous Solution: The Tools of the Trade, O-O Bond Activation in Cu and Fe-Based Coordination Complexes: Breaking it Makes the Difference, μ-Nitrido Diiron Phthalocyanine and Porphyrin Complexes: Unusual Structures With Interesting Catalytic Properties, and The Role of Nonheme Transition Metal-Oxo, -Peroxo and -Superoxo Intermediates in Enzyme Catalysis and Reactions of Bioinspired Complexes. This acclaimed serial features reviews written by experts in the field, serving as an indispensable reference to advanced researchers. Each volume contains an index and chapters are fully referenced. Features comprehensive reviews on the latest developments in inorganic reaction mechanisms, a subfield of inorganic chemistry Includes contributions from leading experts in the field of inorganic reaction mechanisms Serves as an indispensable reference to advanced researchers in inorganic reaction mechanisms
Download or read book Potential Visible Chemical Lasers Via Interactions of Singlet Molecular Oxygen with Heavy Metal Atoms and Oxides written by Salmon Rosenwaks and published by . This book was released on 1985 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present research has been the first part of a continued effort to thoroughly study the kinetics and spectroscopy of the heavy-atoms/singlet oxygen mixtures. The measurements were conducted in a flowing afterflow reactor to which a metal evaporation furnace and a singlet oxygen generator are interfaced. The atoms studied so far were Pb and Bi. The results of the measurements show that significant electronic excitation of metal atoms, metal dimers and metal oxides can be obtained via multiple collisions with singlet molecular oxygen. Laser induced fluorescence measurements in Pb/O2 mixtures corroborate the mechanism for PbO formation previously suggested in this laboratory. Mechanisms for production of excited species in Bi/O2 are inferred from the dependence of the emission intensity from these species in Bi/02 are inferred from the dependence of the emission intensity from these species on (Bi) and (Bi2). In particular, it is suggested that the strong emission from Bi(2D3/2) must originate from energy transfer from O2(I sigma) which, in turn, is produced via multiple collisions of O2(I delta) with Bi2. The results of the present research are encouraging regarding the prospects of obtaining significant concentrations of atomic and molecular species via multiple collision with singlet molecular oxygen. (Author).
