A Matrix Isolation Vibrational Spectroscopic Study of Strongly Hydrogen? Bonded Molecular Complexes

A Matrix Isolation Vibrational Spectroscopic Study of Strongly Hydrogen? Bonded Molecular Complexes PDF Author: P. M. Wright
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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A Matrix Isolation Vibrational Spectroscopic Study of Strongly Hydrogen? Bonded Molecular Complexes

A Matrix Isolation Vibrational Spectroscopic Study of Strongly Hydrogen? Bonded Molecular Complexes PDF Author: P. M. Wright
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Spectroscopic Studies of Very Strongly Hydrogen Bonded Complexes

Spectroscopic Studies of Very Strongly Hydrogen Bonded Complexes PDF Author: Kuang-chou Chang
Publisher:
ISBN:
Category :
Languages : en
Pages : 292

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Intermolecular Interactions in Hydrogen Bonded 1:1 Molecular Complexes

Intermolecular Interactions in Hydrogen Bonded 1:1 Molecular Complexes PDF Author: Anders S. Engdahl
Publisher:
ISBN:
Category : Chemical bonds
Languages : en
Pages : 42

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Abstract: A number of matrix isolated binary hydrogen bonded complexes with water as on of the components have been investigated with FTIR spectroscopy in the mid and far infrared regions. Water has been found to be the hydrogen bond donor in complexes with water, ammonia, dimethyl ether, and acetone. With formanide two equally strong hydrogen bonds are formed one from water to the to the carbonyl oxygen and one from an amide hydrogen to the water oxygen. In the formic acid water complex the strongest bond is from formic acid to water but there is also a second bond where the water acts as the proton donor. HDO prefers as usual to be D-bonded in the studied complexes. A model developed in cooperation with the Theoretical Chemistry Department has been used to make ab initio calculations on the observed complexes. The six intermolecular fundamentals of the complexes have been characterized with this model. It has been found that it is possible to make a quite simple description that holds for all complexes where water is one of the complex partners. Even for the formamide water complex with its cyclic structure the description is valid, but for the formic acid water complex the description fails. In this complex all the intermolecular vibrations, except for the hydrogen bond stretch that is quite pure, are heavily mixed. A new method for infrared laser irradiation has been tested on water dimers and on the formaldehyde water complex. With this tool it was possible to see an intermolecular fundamental of the water dimer.

Frontiers and Advances in Molecular Spectroscopy

Frontiers and Advances in Molecular Spectroscopy PDF Author: Jaan Laane
Publisher: Elsevier
ISBN: 0128112212
Category : Science
Languages : en
Pages : 788

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Book Description
Frontiers and Advances in Molecular Spectroscopy once again brings together the most eminent scientists from around the world to describe their work at the cutting-edge of molecular spectroscopy. Much of what we know about atoms, molecules and the nature of matter has been obtained using spectroscopy over the last one hundred years or so. Going far beyond the topics discussed in Jaan Laane’s earlier book on the subject, these chapters describe new methodologies and applications, instrumental developments and theory, which are taking spectroscopy into still new frontiers. The robust range of topics once again demonstrates the wide utility of spectroscopic techniques. New topics include ultrafast spectroscopy of the transition state, SERS/far-uv spectroscopy, femtosecond coherent anti-Stokes Raman spectroscopy, high-resolution laser induced fluorescence spectroscopy, Raman spectroscopy and biosensors, vibrational optical activity, ultrafast two-dimensional spectroscopy, biology with x-ray lasers, isomerization dynamics and hydrogen bonding, single molecule imaging, spectra of intermediates, matrix isolation spectroscopy and more. Covers spectroscopic investigations on the cutting edge of science Written and edited by leading experts in their respective fields Allows researchers to access a broad range of essential modern spectroscopy content from a single source rather than wading through hundreds of scattered journal articles

Journal of the Chemical Society

Journal of the Chemical Society PDF Author:
Publisher:
ISBN:
Category : Chemistry, Inorganic
Languages : en
Pages : 1042

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Molecular Complexes In Earth's, Planetary Cometary And Interstellar Atmospheres

Molecular Complexes In Earth's, Planetary Cometary And Interstellar Atmospheres PDF Author: Zdenek Slanina
Publisher: World Scientific
ISBN: 9814497150
Category : Science
Languages : en
Pages : 289

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Book Description
This book introduces systematically the concept of weakly-bound complexes into the broad field of atmospheric sciences. To fill up the gap between our rapidly expanding knowledge of the individual properties of Van der Waals and hydrogen-bonded molecules, and our understanding of their role in the atmospheric processes, an ensemble of related topics are covered by a team of expert co-authors. The general properties of the weakly bound molecular complexes (or “clusters”) are discussed, as well as their distribution in the planetary atmospheres. Collision-induced and dimeric absorption and emission are considered in the context of atmospheric spectroscopy. The advanced experimental techniques which enable us to study the spectroscopic features of molecular complexes in the gas phase, or which are adsorbed, are reviewed. The role of molecular complexes in the cometary atmosphere, the Earth mesosphere, and the atmospheres of the giant planets and some of their satellites are also discussed in detail.

Matrix Isolation Spectroscopy

Matrix Isolation Spectroscopy PDF Author: A. Barnes
Publisher: Springer Science & Business Media
ISBN: 9400985401
Category : Science
Languages : en
Pages : 602

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Book Description
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.

Isotope Effects In Chemistry and Biology

Isotope Effects In Chemistry and Biology PDF Author: Amnon Kohen
Publisher: CRC Press
ISBN: 1420028022
Category : Medical
Languages : en
Pages : 1092

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Book Description
The field of isotope effects has expanded exponentially in the last decade, and researchers are finding isotopes increasingly useful in their studies. Bringing literature on the subject up to date, Isotope Effects in Chemistry and Biology covers current principles, methods, and a broad range of applications of isotope effects in the physical, biolo

Molecular Spectroscopy

Molecular Spectroscopy PDF Author: Yukihiro Ozaki
Publisher: John Wiley & Sons
ISBN: 3527814604
Category : Technology & Engineering
Languages : en
Pages : 833

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Book Description
Uniquely creates a strong bridge between molecular spectroscopy and quantum chemistry This two-volume book consists of many reviews reporting new applications of quantum chemistry to molecular spectroscopy (Raman, infrared, near-infrared, terahertz, far-ultraviolet, etc.). It contains brief introductions to quantum chemistry for spectroscopists, and to the recent progress on molecular spectroscopy for quantum chemists. Molecular Spectroscopy: A Quantum Chemistry Approach examines the recent progress made in the field of molecular spectroscopy; the state of the art of quantum chemistry for molecular spectroscopy; and more. It offers multiple chapters covering the application of quantum chemistry to: visible absorption and fluorescence, Raman spectroscopy, infrared spectroscopy, near-infrared spectroscopy, terahertz spectroscopy, and far-ultraviolet spectroscopy. It presents readers with hydrogen bonding studies by vibrational spectroscopy and quantum chemistry, as well as vibrational spectroscopy and quantum chemistry studies on both biological systems and nano science. The book also looks at vibrational anharmonicity and overtones, and nonlinear and time-resolved spectroscopy. -Comprehensively covers existing and recent applications of quantum chemistry to molecular spectroscopy -Introduces the quantum chemistry for the field of spectroscopy and the advancements being made on molecular spectroscopy for quantum chemistry -Edited by world leading experts who have long standing, extensive experience and international standing in the field Molecular Spectroscopy: A Quantum Chemistry Approach is an ideal book for analytical chemists, theoretical chemists, chemists, biochemists, materials scientists, biologists, and physicists interested in the subject.

Reviews in Computational Chemistry, Volume 2

Reviews in Computational Chemistry, Volume 2 PDF Author: Kenny B. Lipkowitz
Publisher: John Wiley & Sons
ISBN: 047012606X
Category : Science
Languages : en
Pages : 547

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Book Description
This second volume of the series 'Reviews in Computational Chemistry' explores new applications, new methodologies, and new perspectives. The topics covered include conformational analysis, protein folding, force field parameterizations, hydrogen bonding, charge distributions, electrostatic potentials, electronic spectroscopy, molecular property correlations, and the computational chemistry literature. Methodologies described include conformational search strategies, distance geometry, molecular mechanics, molecular dynamics, ab initio and semiempirical molecular orbital calculations, and quantitative structure-activity relationships (QSAR) using topological and electronic descriptors. A compendium of molecular modeling software will help users select the computational tools they need. Each chapter in 'Reviews in Computational Chemistry' serves as a brief tutorial for organic, physical, pharmaceutical, and biological chemists new to the field. Practitioners will be interested in the recent advances.