Infrared Spectroscopy Of Cluster Ions High Energy Conformer Trapping And Multiple Photon Absorption

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Infrared Spectroscopy of Cluster Ions: High Energy Conformer Trapping and Multiple Photon Absorption

Author : Jordan P. Beck
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (774 download)

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Book Synopsis Infrared Spectroscopy of Cluster Ions: High Energy Conformer Trapping and Multiple Photon Absorption by : Jordan P. Beck

Download or read book Infrared Spectroscopy of Cluster Ions: High Energy Conformer Trapping and Multiple Photon Absorption written by Jordan P. Beck and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrared predissociation (IRPD) spectra of several cluster ions are presented, resulting in the emergence of two major themes. Trapped, high energy conformers are observed in argon tagged clusters. In non-argon tagged hydrated alkali metal ion clusters, multiple photon absorption processes can occur. The cluster ions discussed in this dissertation are generated by impacting neutral clusters with ions. If there is an energetic barrier between the neutral cluster configuration and the global minimum cluster ion configuration that is larger than the binding energy of the most labile ligand, then high energy conformers can be trapped. Thus, the trapped conformers retain some of the bonds of their neutral precursors. For example, neutral methanol dimer contains a hydrogen bond and a trapped, high energy Cl (CH3OH)2Ar conformer was observed which also contains a methanol0́Ø0́Ø0́Ømethanol hydrogen bond. Similar results are reported for M+(C6H6)2-4(H2O)2Ar and M+(benzyl alcohol)1(H2O)1-2Ar where IRPD spectra reveal hydrogen bonds resulting from the configurations of the neutral precursors. For most of the clusters studied, spectral features from high energy conformers and global minimum energy conformers were observed in the same spectra. However, a special case is reported in chapter 5 in which spectral features from high energy conformers and global minimum energy conformers of Li+(C6H6)2-4(H2O)2Ar were observed in different spectra corresponding to the fragmentation channel monitored. This conformer specific fragmentation greatly simplified the interpretation of the spectra and provided useful information on the cluster energetics. Conformer specific fragmentation was also observed for M+(H2O)5-7, but for a different reason. In the hydrogen bonded O-H stretching region, IRPD spectra obtained by monitoring the loss of two waters only contained features from linear hydrogen bonds. This mode dependent fragmentation is believed to be the result of multiple photon absorption. This conclusion is supported by laser-fluence dependence studies and by evaporative ensemble calculations.

Infrared Spectroscopy of Ion-hydrocarbon Clusters

Author : Oscar Rodriguez (Jr)
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (774 download)

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Book Synopsis Infrared Spectroscopy of Ion-hydrocarbon Clusters by : Oscar Rodriguez (Jr)

Download or read book Infrared Spectroscopy of Ion-hydrocarbon Clusters written by Oscar Rodriguez (Jr) and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Many biological and environmental systems contain ion, water, and hydrophobic components; and it is the balance between these competing interactions which governs their chemistry. This Thesis aims at exploring ion0́Ø0́Ø0́Øhydrocarbon interactions, then ion0́Ø0́Ø0́Øwater0́Ø0́Ø0́Øalkane interactions. To accomplish this, a combination of gas phase infrared predissociation spectroscopy (IRPD) and tandem mass spectrometry is utilized. The solvation of alkali metal ions by methane is discussed first, beginning with the effects of multiple argon atoms on Li+0́Ø0́Ø0́ØCH4 dimer clusters followed by a study of M+(CH4)n clusters where it is revealed that ions have a weak electrostatic effect beyond the first solvent shell. Next, the argon tagging and monitoring unique fragmentation channels are used to selectively probe for high energy Li+(H2O)3-4Ar1 conformers which contain extensive water hydrogen bonding. Finally, ion0́Ø0́Ø0́Øwater0́Ø0́Ø0́Øalkane interactions are probed in Li+(H2O)n clusters containing CH4 or C6H12 molecules. Some spectra contain hydrogen bonded peaks correlating to weak water0́Ø0́Ø0́Øalkane interactions. Furthermore, there is strong evidence that high energy conformers containing water hydrogen bonding are present in the cluster ion beam. This analysis is expanded to anionic Cl-(Water)m(CH4)n clusters to compare with cations. Density functional theory or MP2 level calculations were used to support and help characterize experimental data.

Chiral Analysis

Author : Kenneth W. Busch
Publisher : Elsevier
ISBN 13 :
Total Pages : 728 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Chiral Analysis by : Kenneth W. Busch

Download or read book Chiral Analysis written by Kenneth W. Busch and published by Elsevier. This book was released on 2006-10-30 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chiral Analysis covers an important area of analytical chemistry of relevance to a wide variety of scientific professionals. The target audience is scientific professionals with an undergraduate background in chemistry or a related discipline, specifically organic chemists, researchers in drug discovery, pharmaceutical researchers involved with process analysis or combinatorial libraries, and graduate students in chemistry. Chapters have been written with the nonspecialist in mind so as to be self-contained. * Broad coverage - spectroscopic and separation methods covered in a single volume * Up-to-date and detailed review of the various techniques available and/or under development in this field * Contributions from leading experts in the field

Gas-Phase IR Spectroscopy and Structure of Biological Molecules

Author : Anouk M. Rijs
Publisher : Springer
ISBN 13 : 3319192043
Total Pages : 409 pages
Book Rating : 4.3/5 (191 download)

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Book Synopsis Gas-Phase IR Spectroscopy and Structure of Biological Molecules by : Anouk M. Rijs

Download or read book Gas-Phase IR Spectroscopy and Structure of Biological Molecules written by Anouk M. Rijs and published by Springer. This book was released on 2015-06-03 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. Review articles for the individual volumes are invited by the volume editors. Readership: research chemists at universities or in industry, graduate students.

Physical Chemistry of Cold Gas-Phase Functional Molecules and Clusters

Author : Takayuki Ebata
Publisher : Springer
ISBN 13 : 9811393710
Total Pages : 395 pages
Book Rating : 4.8/5 (113 download)

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Book Synopsis Physical Chemistry of Cold Gas-Phase Functional Molecules and Clusters by : Takayuki Ebata

Download or read book Physical Chemistry of Cold Gas-Phase Functional Molecules and Clusters written by Takayuki Ebata and published by Springer. This book was released on 2019-08-02 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes advanced research on the structures and photochemical properties of polyatomic molecules and molecular clusters having various functionalities under cold gas-phase conditions. Target molecules are crown ethers, polypeptides, large size protonated clusters, metal clusters, and other complex polyatomic molecules of special interest. A variety of advanced frequency and time-domain laser spectroscopic methods are applied. The book begins with the principle of an experimental setup for cold gas-phase molecules and various laser spectroscopic methods, followed by chapters on investigation of specific molecular systems. Through a molecular-level approach and analysis by quantum chemical calculation, it is possible to learn how atomic and molecular-level interactions (van der Waals, hydrogen-bonding, and others) control the specific properties of molecules and clusters. Those properties include molecular recognition, induced fitting, chirality, proton and hydrogen transfer, isomerization, and catalytic reaction. The information will be applicable to the design of new types of functional molecules and nanoparticles in the broad area that includes applied chemistry, drug delivery systems, and catalysts.

Advanced Fragmentation Methods in Biomolecular Mass Spectrometry

Author : Frederik Lermyte
Publisher : Royal Society of Chemistry
ISBN 13 : 1839161043
Total Pages : 359 pages
Book Rating : 4.8/5 (391 download)

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Book Synopsis Advanced Fragmentation Methods in Biomolecular Mass Spectrometry by : Frederik Lermyte

Download or read book Advanced Fragmentation Methods in Biomolecular Mass Spectrometry written by Frederik Lermyte and published by Royal Society of Chemistry. This book was released on 2020-12-15 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a high-level introduction, as well as a reference work for experienced users, to ECD, ETD, EDD, NETD, UVPD, SID, and other advanced fragmentation methods.

Vacuum Ultraviolet Photoionization and Photodissociation of Molecules and Clusters

Author : Cheuk-Yiu Ng
Publisher : World Scientific
ISBN 13 : 9789810204303
Total Pages : 590 pages
Book Rating : 4.2/5 (43 download)

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Book Synopsis Vacuum Ultraviolet Photoionization and Photodissociation of Molecules and Clusters by : Cheuk-Yiu Ng

Download or read book Vacuum Ultraviolet Photoionization and Photodissociation of Molecules and Clusters written by Cheuk-Yiu Ng and published by World Scientific. This book was released on 1991 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph reviews the recent progress in vacuum ultraviolet (VUV) photoionization and photodissociation processes. Photoionization, photoelectron, and fluorescence spectroscopic techniques have played an important role in revealing the photoionization and photodissociation dynamics of molecules in the vacuum ultraviolet region and in providing accurate energetic and spectroscopic information of ions as well as neutral molecules. The book represents the first detailed review of major experimental developments in the studies of single vacuum ultraviolet photon ionization and dissociation processes of gaseous molecules and clusters.

Health Risks from Exposure to Low Levels of Ionizing Radiation

Author : Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation
Publisher : National Academies Press
ISBN 13 : 0309133343
Total Pages : 422 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Health Risks from Exposure to Low Levels of Ionizing Radiation by : Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation

Download or read book Health Risks from Exposure to Low Levels of Ionizing Radiation written by Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation and published by National Academies Press. This book was released on 2006-03-23 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the seventh in a series of titles from the National Research Council that addresses the effects of exposure to low dose LET (Linear Energy Transfer) ionizing radiation and human health. Updating information previously presented in the 1990 publication, Health Effects of Exposure to Low Levels of Ionizing Radiation: BEIR V, this book draws upon new data in both epidemiologic and experimental research. Ionizing radiation arises from both natural and man-made sources and at very high doses can produce damaging effects in human tissue that can be evident within days after exposure. However, it is the low-dose exposures that are the focus of this book. So-called “late” effects, such as cancer, are produced many years after the initial exposure. This book is among the first of its kind to include detailed risk estimates for cancer incidence in addition to cancer mortality. BEIR VII offers a full review of the available biological, biophysical, and epidemiological literature since the last BEIR report on the subject and develops the most up-to-date and comprehensive risk estimates for cancer and other health effects from exposure to low-level ionizing radiation.

The Flavonoids

Author : Jeffrey B. Harborne
Publisher : Springer
ISBN 13 : 1489929096
Total Pages : 1218 pages
Book Rating : 4.4/5 (899 download)

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Book Synopsis The Flavonoids by : Jeffrey B. Harborne

Download or read book The Flavonoids written by Jeffrey B. Harborne and published by Springer. This book was released on 2013-11-11 with total page 1218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flavonoids, one of the most numerous and widespread groups of natural constituents, are important to man not only because they contribute to plant colour but also because many members (e.g. coumestrol, phloridzin, rotenone) are physiologically active. Nearly two thousand substances have been described and as a group they are universally distributed among vascular plants. Although the anthocyanins have an undisputed function as plant pigments, the raison d'etre for the more widely distributed colourless flavones and flavonols still remains a mystery. It is perhaps the challenge of discovering these yet undisc10sed functions which has caused the considerable resurgence of interest in flavonoids during the last decade. This book attempts to summarize progress that has been made in the study of these constituents since the first comprehensive monograph on the chemistry of the flavonoid compounds was published, under the editorship of T. A. Geissman, in 1962. The present volume is divided into three parts. The first section (Chapters 1-4) deals with advances in chemistry, the main emphasis being on spectral techniques to take into account the re cent successful applications of NMR and mass spectral measurements to structural identifications. Recent developments in isolation techniques and in synthesis are also covered in this section. Advances in chemical knowledge of individual c1asses of flavonoid are mentioned inter aha in later chapters of the book.

Science

Author : John Michels (Journalist)
Publisher :
ISBN 13 :
Total Pages : 1644 pages
Book Rating : 4.3/5 (117 download)

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Book Synopsis Science by : John Michels (Journalist)

Download or read book Science written by John Michels (Journalist) and published by . This book was released on 2012 with total page 1644 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Liquid Chromatography

Author : Salvatore Fanali
Publisher : Elsevier
ISBN 13 : 0128093447
Total Pages : 840 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Liquid Chromatography by : Salvatore Fanali

Download or read book Liquid Chromatography written by Salvatore Fanali and published by Elsevier. This book was released on 2017-06-23 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid Chromatography: Applications, Second Edition,is a single source of authoritative information on all aspects of the practice of modern liquid chromatography. It gives those working in both academia and industry the opportunity to learn, refresh, and deepen their knowledge of the wide variety of applications in the field. In the years since the first edition was published, thousands of papers have been released on new achievements in liquid chromatography, including the development of new stationary phases, improvement of instrumentation, development of theory, and new applications in biomedicine, metabolomics, proteomics, foodomics, pharmaceuticals, and more. This second edition addresses these new developments with updated chapters from the most expert researchers in the field. Emphasizes the integration of chromatographic methods and sample preparation Explains how liquid chromatography is used in different industrial sectors Covers the most interesting and valuable applications in different fields, e.g., proteomic, metabolomics, foodomics, pollutants and contaminants, and drug analysis (forensic, toxicological, pharmaceutical, biomedical) Includes references and tables with commonly used data to facilitate research, practical work, comparison of results, and decision-making

Introduction to Spectroscopy

Author : Donald L. Pavia
Publisher :
ISBN 13 : 9789865632021
Total Pages : 764 pages
Book Rating : 4.6/5 (32 download)

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Book Synopsis Introduction to Spectroscopy by : Donald L. Pavia

Download or read book Introduction to Spectroscopy written by Donald L. Pavia and published by . This book was released on 2015 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Infrared Spectroscopy

Author : Barbara H. Stuart
Publisher : John Wiley & Sons
ISBN 13 : 0470011130
Total Pages : 242 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Infrared Spectroscopy by : Barbara H. Stuart

Download or read book Infrared Spectroscopy written by Barbara H. Stuart and published by John Wiley & Sons. This book was released on 2004-08-20 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an introduction to those needing to use infrared spectroscopy for the first time, explaining the fundamental aspects of this technique, how to obtain a spectrum and how to analyse infrared data covering a wide range of applications. Includes instrumental and sampling techniques Covers biological and industrial applications Includes suitable questions and problems in each chapter to assist in the analysis and interpretation of representative infrared spectra Part of the ANTS (Analytical Techniques in the Sciences) Series.

Mass Spectrometry

Author : Jürgen H Gross
Publisher : Springer Science & Business Media
ISBN 13 : 3540407391
Total Pages : 534 pages
Book Rating : 4.5/5 (44 download)

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Book Synopsis Mass Spectrometry by : Jürgen H Gross

Download or read book Mass Spectrometry written by Jürgen H Gross and published by Springer Science & Business Media. This book was released on 2006-04-05 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mass Spectrometry is an ideal textbook for students and professionals as well as newcomers to the field. Starting from the very first principles of gas-phase ion chemistry and isotopic properties, the textbook takes the reader through the design of mass analyzers and ionization methods all the way to mass spectral interpretation and coupling techniques. Step-by-step, the reader learns how mass spectrometry works and what it can do. The book comprises a balanced mixture of practice-oriented information and theoretical background. It features a clear layout and a wealth of high-quality figures. Exercises and solutions are located on the Springer Global Web.

Imaging in Chemical Dynamics

Author : Arthur G. Suits
Publisher :
ISBN 13 :
Total Pages : 430 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Imaging in Chemical Dynamics by : Arthur G. Suits

Download or read book Imaging in Chemical Dynamics written by Arthur G. Suits and published by . This book was released on 2001 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive review of the rapidly growing field of imaging-based probes of chemical dynamics. It includes discussions of state-resolved photodissociation dynamics, orbital alignment and vector correlations, radical photodissociation, surface scattering, imaging photoelectron spectroscopy, ultrafast dynamics and coincidence techniques.

Molecular Photoelectron Spectroscopy

Author : David Warren Turner
Publisher : Wiley-Interscience
ISBN 13 :
Total Pages : 408 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Molecular Photoelectron Spectroscopy by : David Warren Turner

Download or read book Molecular Photoelectron Spectroscopy written by David Warren Turner and published by Wiley-Interscience. This book was released on 1970 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Applications of EPR in Radiation Research

Author : Anders Lund
Publisher : Springer
ISBN 13 : 3319092162
Total Pages : 766 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Applications of EPR in Radiation Research by : Anders Lund

Download or read book Applications of EPR in Radiation Research written by Anders Lund and published by Springer. This book was released on 2014-10-20 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of EPR in Radiation Research is a multi-author contributed volume presented in eight themes: I. Elementary radiation processes (in situ and low temperature radiolysis, quantum solids); II: Solid state radiation chemistry (crystalline, amorphous and heterogeneous systems); III: Biochemistry, biophysics and biology applications (radicals in biomaterials, spin trapping, free-radical-induced DNA damage); IV: Materials science (polymeric and electronic materials, materials for treatment of nuclear waste, irradiated food); V: Radiation metrology (EPR-dosimetry, retrospective and medical applications); VI: Geological dating; VII: Advanced techniques (PELDOR, ESE and ENDOR spectroscopy, matrix isolation); VIII: Theoretical tools (density-functional calculations, spectrum simulations).