Download or read book Infrared Multiphoton and Collision Induced Dissociation Studies of Some Gaseous Alkylamine Ions written by C. H. Watson and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collision induced dissociation and infrared multiphoton dissociation of ions formed in di- and triethylamine, di- and tri-n-propylamine, and diisopropylamine were investigated by Fourier transform ion cyclotron resonance mass spectrometry. Molecular ions of all amines except di-n-propylamine produced similar fragment ions when subjected to either dissociation technique. The initial fragmentation involved C(alpha)-C(beta) bond cleavage, loss of an alkyl radical, and formation of an immonium ion. Subsequent fragmentations of the immonium ions produced by both dissociation mechanisms involved McLafferty type rearrangements and loss of alkenes. The molecular ion of di-n-propylamine fragmented by a different mechanism when subjected to infrared irradiation. Protonated molecules of di- and tri-n-propylamine yielded C3H6 and an ammonium ion upon infrared multiphoton dissociation, while protonated molecules of the other amines did not dissociate using this technique. Collision induced dissociation, on the other hand, produced fragmentation for all protonated molecules. Explanation of the different fragmentations observed for the two dissociation techniques is given in terms of a mechanism involving a tight transition state for protonated di- and tri-n-propylamine dissociation. Keywords: Infrared Multiphoton Dissociation; Collision Induced Dissociation; Alkylamines; Fourier Transform Ion Cyclotron Resonance Mass Spectrometry.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Infrared Multiphoton Dissociation of Gaseous Ions Studied by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry written by Clifford Hunter Watson and published by . This book was released on 1986 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1986-03 with total page 1278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1986 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Molecular Beam Studies of Infrared Multiphoton Dissociation and Inelastic Gas surface Scattering written by Cindy Linea Berrie and published by . This book was released on 1997 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Infrared Multiphoton Dissociation of Gaseous Ions in a Quadrupole Ion Storage Trap written by Alexander Baldwin Young and published by . This book was released on 1984 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Angle and Energy Resolved Studies of the Collision Induced Dissociation of Polyatomic Molecular Ions written by Stephen Gee Anderson and published by . This book was released on 1992 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy resolved Collision induced Dissociation Studies for Ion Thermochemistry written by Alex Andrew Nickel and published by . This book was released on 2015 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy-resolved competitive threshold collision-induced dissociation (TCID) measurements for radical species relevant to combustion were made using a guided ion beam tandem mass spectrometer. These ion thermochemistry methods can be used to obtain thermochemical properties of these neutral radicals through the use of thermochemical cycles. The high reactivity of radical species often makes them challenging to directly measure. Study of the peroxyformate anion (HC(O)OO−) revealed a singlet-triplet crossing in the oxygen-oxygen bond dissociation channel. Analysis of the thresholds gives the first experimentally determined enthalpies of formation for both peroxyformic acid and the peroxyformyl radical. We have also studied the TCID of linear and branched hexanol (C6H13OH) complexed with fluoride and acetylide to determine their gas-phase acidities. The role of conformation on the gas-phase acidities of 1-hexanol and 3, 3-dimethyl-1-butanol was explored using modified microcanonical statistical rate theory (RRKM) models with internal rotations treated as one-dimensional hindered rotors. These six-carbon primary alcohols have the same “intrinsic” gas-phase acidity, defined as deprotonation without conformational relaxation, but differ in observed acidity due to conformational stabilization of the anion.

Download or read book American Chemical Society Directory of Graduate Research 1987 written by American Chemical Society, Committee on Professional Training Staff and published by . This book was released on 1987 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mass Spectrometry Reviews written by and published by . This book was released on 1989 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scope of the published reviews include, but are not limited to topics, such as theoretical treatments, instrumental design, ionization methods, analyzers, detectors, application to the qualitative and quantitative analysis of various compounds or elements, basic ionchemistry and structure studies, ion energetic studies, and studies on biomolecules, polymers, etc.

Download or read book Mass Spectrometry written by Edmond de Hoffmann and published by Wiley. This book was released on 2001-10-10 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers a complete overview of the principles, theories and key applications of modern mass spectrometry in this introductory textbook. Following on from the highly successful first edition, this edition is extensively updated including new techniques and applications. All instrumental aspects of mass spectrometry are clearly and concisely described; sources, analysers and detectors. * Revised and updated * Numerous examples and illustrations are combined with a series of exercises to help encourage student understanding * Includes biological applications, which have been significantly expanded and updated * Also includes coverage of ESI and MALDI

Download or read book Fundamentals of Contemporary Mass Spectrometry written by Chhabil Dass and published by John Wiley & Sons. This book was released on 2007-05-11 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern mass spectrometry - the instrumentation and applications in diverse fields Mass spectrometry has played a pivotal role in a variety of scientific disciplines. Today it is an integral part of proteomics and drug discovery process. Fundamentals of Contemporary Mass Spectrometry gives readers a concise and authoritative overview of modern mass spectrometry instrumentation, techniques, and applications, including the latest developments. After an introduction to the history of mass spectrometry and the basic underlying concepts, it covers: Instrumentation, including modes of ionization, condensed phase ionization techniques, mass analysis and ion detection, tandem mass spectrometry, and hyphenated separation techniques Organic and inorganic mass spectrometry Biological mass spectrometry, including the analysis of proteins and peptides, oligosaccharides, lipids, oligonucleotides, and other biological materials Applications to quantitative analysis Based on proven teaching principles, each chapter is complete with a concise overview, highlighted key points, practice exercises, and references to additional resources. Hints and solutions to the exercises are provided in an appendix. To facilitate learning and improve problem-solving skills, several worked-out examples are included. This is a great textbook for graduate students in chemistry, and a robust, practical resource for researchers and scientists, professors, laboratory managers, technicians, and others. It gives scientists in diverse disciplines a practical foundation in modern mass spectrometry.

Download or read book Reactive Intermediates written by Leonardo S. Santos and published by John Wiley & Sons. This book was released on 2009-11-04 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last two decades there has been considerable growth in the development of electrospray ionization mass spectrometry (ESI-MS) as a practical method in the study of reaction mechanisms. This method allows the interception and characterization of key intermediates, either as transient species or as protonated/deprotonated forms of neutral species by API-MS. The outstanding features and advantages of ESI-MS make it one of the most suitable tools for the fast screening of intermediates directly from solution, providing hitherto unavailable chemical information to organic chemists. This monograph provides an overview of the mechanisms involved in ESI-MS, the historical perspectives before looking further in-depth at specific reactions and intermediates. Written by researchers in the field, this book is an unique resource for the understanding of this cutting-edge technique.

Download or read book Metal Organic Frameworks written by Leonard R. MacGillivray and published by John Wiley & Sons. This book was released on 2010-12-17 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-organic frameworks represent a new class of materials that may solve the hydrogen storage problem associated with hydrogen-fueled vehicles. In this first definitive guide to metal-organic framework chemistry, author L. MacGillivray addresses state-of-art developments in this promising technology for alternative fuels. Providing professors, graduate and undergraduate students, structural chemists, physical chemists, and chemical engineers with a historical perspective, as well as the most up-to-date developments by leading experts, Metal-Organic Frameworks examines structure, symmetry, supramolecular chemistry, surface engineering, metal-organometallic frameworks, properties, and reactions.

Download or read book Unimolecular Reaction Dynamics written by Tomas Baer and published by Oxford University Press. This book was released on 1996-06-27 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a penetrating and comprehensive description of energy selected reactions from a theoretical as well as experimental view. Three major aspects of unimolecular reactions involving the preparation of the reactants in selected energy states, the rate of dissociation of the activated molecule, and the partitioning of the excess energy among the final products, are fully discussed with the aid of 175 illustrations and over 1,000 references, most from the recent literature. Examples of both neutral and ionic reactions are presented. Many of the difficult topics are discussed at several levels of sophistication to allow access by novices as well as experts. Among the topics covered for the first time in monograph form is a discussion of highly excited vibrational/rotational states and intramolecular vibrational energy redistribution. Problems associated with the application of RRKM theory are discussed with the aid of experimental examples. Detailed comparisons are also made between different statistical models of unimolecular decomposition. Both quantum and classical models not based on statistical assumptions are described. Finally, a chapter devoted to the theory of product energy distribution includes the application of phase space theory to the dissociation of small and large clusters. The work will be welcomed as a valuable resource by practicing researchers and graduate students in physical chemistry, and those involved in the study of chemical reaction dynamics.

Download or read book Progress in the Chemistry of Organic Natural Products 100 written by A. D. Kinghorn and published by Springer. This book was released on 2014-11-17 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volumes of this classic series, now referred to simply as "Zechmeister" after its founder, L. Zechmeister, have appeared under the Springer Imprint ever since the series' inauguration in 1938. It is therefore not really surprising to find out that the list of contributing authors, who were awarded a Nobel Prize, is quite long: Kurt Alder, Derek H.R. Barton, George Wells Beadle, Dorothy Crowfoot-Hodgkin, Otto Diels, Hans von Euler-Chelpin, Paul Karrer, Luis Federico Leloir, Linus Pauling, Vladimir Prelog, with Walter Norman Haworth and Adolf F.J. Butenandt serving as members of the editorial board. The volumes contain contributions on various topics related to the origin, distribution, chemistry, synthesis, biochemistry, function or use of various classes of naturally occurring substances ranging from small molecules to biopolymers. Each contribution is written by a recognized authority in his field and provides a comprehensive and up-to-date review of the topic in question. Addressed to biologists, technologists and chemists alike, the series can be used by the expert as a source of information and literature citations and by the non-expert as a means of orientation in a rapidly developing discipline.