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Author : Shin Yi Toh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)
Download or read book Conformational and UV Photochemistry Studies of Amino Acids in Matrix-isolation FTIR Spectroscopy written by Shin Yi Toh and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lester Andrews
Publisher :
ISBN 13 :
Total Pages : 448 pages
Book Rating : 4.3/5 (91 download)
Download or read book Chemistry and Physics of Matrix-isolated Species written by Lester Andrews and published by . This book was released on 1989 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Matrix-isolation spectroscopy, as a technique for studying unstable species, has had tremendous lasting powers. Since 1954, matrix-isolation has been able to assimilate new technology rather than being replaced by it. The matrix-isolation technique for producing and trapping new chemical species has been applied to an ever increasing range of chemical and physical problems since its inception. The last 12 years have seen a substantial number of new developments and applications of the matrix technique. The chapters in this book describe many of the contributions of matrix-isolation spectroscopy to chemistry and physics in the last decade, and as such predict the continued evolution of this technique over the next decade. Experimental techniques are generally closely related to the development of new apparatus, and each chapter has a section describing innovations in instrumentation such as the closed-cycle cryogenic cooler that has revolutionized the technique. In addition, each chapter describes many of the specialized methods used to prepare, trap and study particular new subject species. The volume will be an indispensable reference source for graduate students and other scientists new to this field, as well as chemists and physicists already involved in applied spectroscopy.
Author : Stefano Crespi
Publisher : Royal Society of Chemistry
ISBN 13 : 1837672156
Total Pages : 614 pages
Book Rating : 4.8/5 (376 download)
Download or read book Photochemistry: Volume 51 written by Stefano Crespi and published by Royal Society of Chemistry. This book was released on 2023-12-20 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fnu Maihemuti
Publisher :
ISBN 13 : 9781267845924
Total Pages : 82 pages
Book Rating : 4.8/5 (459 download)
Download or read book FTIR Studies on the Spectroscopy and Photochemistry of Small Molecules Isolated in Solid Parahydrogen written by Fnu Maihemuti and published by . This book was released on 2012 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis focuses on investigations of the photochemistry and FTIR spectroscopy of molecules isolated in low temperature solid parahydrogen. The first project is on the photodissociation of N-methylformamide. The 193 nm UV photolysis of N-methylformamide (HCONHCH3 ) at 1.9 K in solid parahydrogen produces primary radical fragments ·HCO, ·NHCH3 , ·CONHCH3 , and molecules CO and NH2 CH3. It is found that these fragments are formed by dissociation of N-methylformamide along three different competing channels, and the main channel is the rupture of the amide C-N bond. The ·NHCH3 and ·CONHCH3 radicals are spectroscopically characterized for the first time with the aid of ab initio calculations. The second project is on FTIR spectroscopic studies of the nuclear spin conversion of ammonia molecules in solid parahydrogen. With rapid freezing in solid parahydrogen, it is possible to trap non-equilibrium nuclear spin populations of ammonia and study the kinetics of equilibration using FTIR spectroscopy. This observation indicates the conversion of para ammonia to ortho ammonia, which is only possible through the flip of nuclear spin. The concentration change of ortho-para ammonia after deposition can be explained as the rotational state population redistribution process after the temperature of the system is changed rapidly from room temperature to 1.8 K. Since the rotational state is coupled to nuclear spin state, which can change slowly, it is possible to monitor the ortho-para concentration change process using conventional FTIR spectroscopy.
Author : Jan Lundell
Publisher :
ISBN 13 : 9789529067152
Total Pages : 108 pages
Book Rating : 4.0/5 (671 download)
Download or read book FTIR-matrix Isolation and Ab Initio Studies of Some Small Hydrogen-bonded Molecular Complexes written by Jan Lundell and published by . This book was released on 1995 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Albert Padwa
Publisher : Routledge
ISBN 13 : 1351426559
Total Pages : 468 pages
Book Rating : 4.3/5 (514 download)
Download or read book Organic Photochemistry written by Albert Padwa and published by Routledge. This book was released on 2017-10-02 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic photochemistry is the science arising from the application of photochemicalmethods to organic chemistry and organic chemical methods to photochemistry. It is aninterdisciplinary frontier.Intense activity in organic photochemistry in the last decade has produced so vast anaccumulation of factual knowledge that chemists in general have viewed it with awe.Even those chemists engaged in the study of organic photochemistry will find the rate ofdevelopment in the field perplexing to a high degree. This series originated to fill theneed for a critical summary of this vigorously expanding field with the purpose ofdrawing together seemingly unrelated facts, summarizing progress, and clarifyingproblems.Volume 11 continues to fulfill the original, essential role of this unique series byproviding a convenient review of the structural aspects of organic photochemistry. Aswith earlier volumes, this new book offers the research findings of distinguishedauthorities. It stresses timely aspects of organic photochemistry-previously scatteredthroughout the large body of literature-for which necessary critical review has beenlacking.This volume of the series emphasizes the mechanistic details of the di-n:-methanerearrangement . .. the synthetic aspects of the oxadi-n:-methane reaction ... thephotochemistry of carbenium ions and related species .. . photoinduced hydrogen atomabstraction by carbonyl compounds ... and matrix photochemistry of nitrenes, carbenes,and excited triplet states. Complete with numerous illustrations and bibliographiccitations of the literature, this book explores these important processes to the advantageof organic chemists, as an aid to research and as a source for supplementary knowledgeon particular topics .
Author : A. Barnes
Publisher : Springer Science & Business Media
ISBN 13 : 9400985401
Total Pages : 602 pages
Book Rating : 4.4/5 (9 download)
Download or read book Matrix Isolation Spectroscopy written by A. Barnes and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: The matrix isolation (MI) method has now been used for nearly thirty years. During this period it has been actively developed and the range of problems tackled greatly extended. Originally it was used for studies of transient species involv ing vibrational, electronic and ESR spectroscopy. Nowadays the study of transient species forms a comparatively small part of HI work since it has been amply demonstrated that very fruitful information can be obtained of the structure and interactions of stable molecules and their aggregates. In addition to the s~ectroscopic methods mentioned above the MI technique is nowadays a standard method in research based on vibrational relaxation, luminescence, Mossbauer, magnetic circular dichroism, pulsed NMR and photoelectron spectroscopy. The matrix isolation technique affords considerable advantages over more conventional methods in most applications of spectroscopy. Areas where the technique has been widely applied, or shows great potential, include: metal atom chemistry, and its relation to surface chemistry, high temperature inorganic species, transition metal complexes, interstellar species, free radicals and unstable molecules, conformational studies, molecular com plexes, and intermolecular forces.
Author : Johannes Kästner
Publisher : Royal Society of Chemistry
ISBN 13 : 1839160381
Total Pages : 453 pages
Book Rating : 4.8/5 (391 download)
Download or read book Tunnelling in Molecules written by Johannes Kästner and published by Royal Society of Chemistry. This book was released on 2020-09-22 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum tunnelling is one of the strangest phenomena in chemistry, where we see the wave nature of atoms acting in “impossible” ways. By letting molecules pass through the kinetic barrier instead of over it, this effect can lead to chemical reactions even close to the absolute zero, to atypical spectroscopic observations, to bizarre selectivity, or to colossal isotopic effects. Quantum mechanical tunnelling observations might be infrequent in chemistry, but it permeates through all its disciplines producing remarkable chemical outcomes. For that reason, the 21st century has seen a great increase in theoretical and experimental findings involving molecular tunnelling effects, as well as in novel techniques that permit their accurate predictions and analysis. Including experimental, computational and theoretical chapters, from the physical and organic to the biochemistry fields, from the applied to the academic arenas, this new book provides a broad and conceptual perspective on tunnelling reactions and how to study them. Quantum Tunnelling in Molecules is the obligatory stop for both the specialist and those new to this world.
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 030916463X
Total Pages : 222 pages
Book Rating : 4.3/5 (91 download)
Download or read book Visualizing Chemistry written by National Research Council and published by National Academies Press. This book was released on 2006-06-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists and engineers have long relied on the power of imaging techniques to help see objects invisible to the naked eye, and thus, to advance scientific knowledge. These experts are constantly pushing the limits of technology in pursuit of chemical imagingâ€"the ability to visualize molecular structures and chemical composition in time and space as actual events unfoldâ€"from the smallest dimension of a biological system to the widest expanse of a distant galaxy. Chemical imaging has a variety of applications for almost every facet of our daily lives, ranging from medical diagnosis and treatment to the study and design of material properties in new products. In addition to highlighting advances in chemical imaging that could have the greatest impact on critical problems in science and technology, Visualizing Chemistry reviews the current state of chemical imaging technology, identifies promising future developments and their applications, and suggests a research and educational agenda to enable breakthrough improvements.
Author : American Chemical Society
Publisher :
ISBN 13 :
Total Pages : 1304 pages
Book Rating : 4.F/5 ( download)
Download or read book Chemical Research Faculties written by American Chemical Society and published by . This book was released on 1996 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vivien Yeh
Publisher : Springer
ISBN 13 : 9811312389
Total Pages : 139 pages
Book Rating : 4.8/5 (113 download)
Download or read book Study of Bacteriorhodopsin in a Controlled Lipid Environment written by Vivien Yeh and published by Springer. This book was released on 2018-10-26 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the study of how the properties of nanodiscs, such as lipid composition and size, influence the function of the embedding integral membrane protein, bacteriorhodopsin. The author performed systematic studies to show that the lipid composition and the charge of the hydrophobic head and the structure of hydrophilic tails affect the photocycle pathway of bacteriorhodopsin, which is closely associated with its proton-pumping activity. Furthermore, the author demonstrated a highly efficient method for extracting membrane proteins directly from the biological membrane, preserving protein conformation, function and essential native lipids. This book demonstrates optimization and sample preparation, and presents practical methods of preparing membrane protein-embedded nanodisc samples for biophysical studies, which benefit structural and functional studies in the field of membrane protein characterization, both.
Author : Matthew S. Platz
Publisher : John Wiley & Sons
ISBN 13 : 0470120819
Total Pages : 492 pages
Book Rating : 4.4/5 (71 download)
Download or read book Reviews of Reactive Intermediate Chemistry written by Matthew S. Platz and published by John Wiley & Sons. This book was released on 2007-04-20 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of reactive intermediates is central to a modern mechanistic and quantitative understanding of organic chemistry. Moreover, it underlies a significant portion of modern synthetic chemistry and is integral to a molecular view of biological chemistry. Reviews in Reactive Intermediate Chemistry presents an up-to-date, authoritative guide to this fundamental topic. Although it follows Reactive Intermediate Chemistry by the same authors, it serves as a free-standing resource for the entire chemical and biochemical community. The book includes: Relevant, practical applications Coverage of such topics as mass spectrometry methods, reactive intermediates in interstellar medium, quantum mechanical tunnelling, solvent effects, reactive intermediates in biochemical processes, and excited state surfaces Discussions of emerging areas, particularly those involving dynamics and theories Concluding sections identifying key directions for future research are provided at the end of each chapter
Author : Ian R. Dunkin
Publisher : Royal Society of Chemistry
ISBN 13 : 0854044558
Total Pages : 406 pages
Book Rating : 4.8/5 (54 download)
Download or read book Photochemistry written by Ian R. Dunkin and published by Royal Society of Chemistry. This book was released on 2009-10-09 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The breadth of scientific and technological interests in the general topic of photochemistry is truly enormous and includes, for example, such diverse areas as microelectronics, atmospheric chemistry, organic synthesis, non-conventional photoimaging, photosynthesis, solar energy conversion, polymer technologies, and spectroscopy. This Specialist Periodical Report on Photochemistry aims to provide an annual review of photo-induced processes that have relevance to the above wide-ranging academic and commercial disciplines, and interests in chemistry, physics, biology and technology. In order to provide easy access to this vast and varied literature, each volume of Photochemistry comprises sections concerned with photophysical processes in condensed phases, organic aspects which are sub-divided by chromophore type, polymer photochemistry, and photochemical aspects of solar energy conversion. Volume 37 covers literature published from July 2004 to June 2007. 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 : Michele Aresta
Publisher : Springer
ISBN 13 : 366246831X
Total Pages : 423 pages
Book Rating : 4.6/5 (624 download)
Download or read book Reaction Mechanisms in Carbon Dioxide Conversion written by Michele Aresta and published by Springer. This book was released on 2015-11-07 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an analysis of the reaction mechanisms relevant to a number of processes in which CO2 is converted into valuable products. Several different processes are considered that convert CO2 either in specialty chemicals or in bulk products or fuels. For each reaction, the mechanism is discussed and the assessed steps besides the dark sites of the reaction pathway are highlighted. From the insertion of CO2 into E-X bonds to the reduction of CO2 to CO or other C1 molecules or else to C2 or Cn molecules, the reactions are analysed in order to highlight the known and obscure reaction steps. Besides well known reaction mechanisms and energy profiles, several lesser known situations are discussed. Advancing knowledge of the latter would help to develop efficient routes for the conversion of CO2 into valuable products useful either in the chemical or in the energy industry. The content of this book is quite different from other books reporting the use of CO2. On account of its clear presentation, “Reaction Mechanisms in Carbon Dioxide Conversion” targets in particular researchers, teachers and PhD students.
Author :
Publisher :
ISBN 13 :
Total Pages : 1584 pages
Book Rating : 4.:/5 (31 download)
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1995 with total page 1584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Winslow R. Briggs
Publisher : John Wiley & Sons
ISBN 13 : 3527604855
Total Pages : 496 pages
Book Rating : 4.5/5 (276 download)
Download or read book Handbook of Photosensory Receptors written by Winslow R. Briggs and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first complete resource on photosensory receptors from bacteria, plants and animals compiles the data on all known classes of photoreceptors, creating a must-have reference for students and researchers for many years to come. Among the editors are the current and a former president of the American Society for Photobiology.
Author : Jeffrey B. Harborne
Publisher : Springer Science & Business Media
ISBN 13 : 9400959214
Total Pages : 346 pages
Book Rating : 4.4/5 (9 download)
Download or read book Phytochemical Methods written by Jeffrey B. Harborne and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: While there are many books available on methods of organic and biochemical analysis, the majority are either primarily concerned with the application of a particular technique (e.g. paper chromatography) or have been written for an audience of chemists or for biochemists work ing mainly with animaltissues. Thus, no simple guide to modern metho ds of plant analysis exists and the purpose of the present volume is to fill this gap. It is primarily intended for students in the plant sciences, who have a botanical or a general biological background. It should also be of value to students in biochemistry, pharmacognosy, food science and 'natural products' organic chemistry. Most books on chromatography, while admirably covering the needs of research workers, tend to overwhelm the student with long lists of solvent systems and spray reagents that can be applied to each class of organic constituent. The intention here is to simplify the situation by listing only a few specially recommended techniques that have wide currency in phytochemical laboratories. Sufficient details are provided to allow the student to use the techniques for themselves and most sections contain some introductory practical experiments which can be used in classwork.
