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Rotational Structure In Molecular Infrared Spectra

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Rotational Structure in Molecular Infrared Spectra

Rotational Structure in Molecular Infrared Spectra Book
Author : Carlo di Lauro
Publisher : Newnes
Release : 2013-04-27
ISBN : 0124078931
Language : En, Es, Fr & De

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Book Description :

Recent advances in infrared molecular spectroscopy have resulted in sophisticated theoretical and laboratory methods that are difficult to grasp without a solid understanding of the basic principles and underlying theory of vibration-rotation absorption spectroscopy. Rotational Structure in Molecular Infrared Spectra fills the gap between these recent, complex topics and the most elementary methods in the field of rotational structure in the infrared spectra of gaseous molecules. There is an increasing need for people with the skills and knowledge to interpret vibration-rotation spectra in many scientific disciplines, including applications in atmospheric and planetary research. Consequently, the basic principles of vibration-rotation absorption spectroscopy are addressed for contemporary applications. In addition to covering operational quantum mechanical methods, spherical tensor algebra, and group theoretical methods applied to molecular symmetry, attention is also given to phase conventions and their effects on the values of matrix elements. Designed for researchers and PhD students involved in the interpretation of vibration-rotation spectra, the book intentionally separates basic theoretical arguments (in the appendices), allowing readers who are mainly concerned with applications to skip the principles while at the same time providing a sound theoretical basis for readers who are looking for more foundational information. Reviews basic theory and contemporary methods of vibration rotation absorption spectroscopy, including operational quantum mechanical methods, spherical tensor algebra, and group theoretical methods applied to molecular symmetry Covers sophisticated mathematical topics in simple, easy-to-read language Discusses methods and applications separately from basic theoretical arguments for quick reference

High Resolution Infrared Spectroscopy of Pyrazine and Naphthalene in a Molecular Bean

High Resolution Infrared Spectroscopy of Pyrazine and Naphthalene in a Molecular Bean Book
Author : Anonim
Publisher : Unknown
Release : 1993
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The high resolution infrared spectrum of pyrazine and naphthalene were measured in a molecular beam in the vicinity of the C-H stretching transition. The rotational structure in the spectrum of pyrazine from 3065-3073/ cm reveals that the C-H stretch is coupled to one other vibrational mode in the molecule. The mode coupling is manifested in the spectrum as two overlapping vibrational bands. Each of these two bands are well modeled by an asymmetric top/rigid rotor Hamiltonian. The lack of any angular momentum dependence on the coupling indicates that the vibrations are coupled by an anharmonic mechanism. The magnitude of the coupling matrix element was determined to be 0.36/cm. The rotational structure in the spectrum of naphthalene from 3063-3067/cm reveals that except for several local perturbations, the spectrum is well modeled by an asymmetric top/rigid rotor Hamiltonian. The local perturbations include transitions that are split into doublets as well as transitions that have been shifted from their expected positions. The magnitude of the average coupling matrix element for the doublets was determined to be 0.0016/cm. A comparison between the vibrational mode coupling in pyrazine and naphthalene indicates that mode coupling does not correlate with the density of states in the two molecules.

Molecular Vibrational rotational Spectra

Molecular Vibrational rotational Spectra Book
Author : D. Papousek,Dušan Papoušek,Mamed Ragimovich Aliev
Publisher : Elsevier Science & Technology
Release : 1982
ISBN : 9780444997371
Language : En, Es, Fr & De

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Book Description :

Download Molecular Vibrational rotational Spectra book written by D. Papousek,Dušan Papoušek,Mamed Ragimovich Aliev, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Rotational Structure in Molecular Infrared Spectra

Rotational Structure in Molecular Infrared Spectra Book
Author : Carlo di Lauro
Publisher : Elsevier
Release : 2020-05-17
ISBN : 0128223944
Language : En, Es, Fr & De

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Book Description :

Rotational Structure in Molecular Infrared Spectra, Second Edition, fills the gap between these complex topics and the most elementary methods in the field of rotational structure in the infrared spectra of gaseous molecules. Combining foundational theoretical information with advanced applications, this book is a useful guide for all those involved in the application of molecular spectroscopic techniques and the interpretation of vibration-rotation spectra. Interpreting vibration-rotation spectra is an important skill in many scientific disciplines, ranging from nanochemistry to planetary research, hence this book is an ideal resource. Includes new content on the interaction of rotation and nuclear electric quadrupoles, coupled and uncoupled nuclei, and internal rotation from the high-barrier basis limit Provides updated tables and figures throughout to support the knowledge outlined in the text Outlines different paths through the text to help readers from different backgrounds explore the most appropriate content for their needs

The Structure of Molecules

The Structure of Molecules Book
Author : Gordon M. Barrow,C.M. Barrow
Publisher : Addison-Wesley
Release : 1963
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

RADIOATION AND THE ENERGIES OF MOLECULES; ROTATION SPECTRA AND THE SIZE AND SHAPE OF MOLECULES; VIBRATIONAL SPECTRA AND THE FLEXIBILITY OF MOLECULES; THE SIMULTANEOUS ROTATION AND VIBRATION OF DIATOMIC MOLECULES; SPECTRA DUE TO CHANGE IN THE ARRANGEMENT OF THE ELECTRONS OF A MOLECULES, THE EMISSIPATION OF ENERGY BY EXCITED MOLECULES.

Infrared Spectroscopy of Triatomics for Space Observation

Infrared Spectroscopy of Triatomics for Space Observation Book
Author : Pierre-Richard Dahoo,Azzedine Lakhlifi
Publisher : Wiley-ISTE
Release : 2019-01-23
ISBN : 1786303930
Language : En, Es, Fr & De

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Book Description :

This book is dedicated to the application of the different theoretical models described in Volume 1 to identify the near-, mid- and far-infrared spectra of linear and nonlinear triatomic molecules in gaseous phase or subjected to environmental constraints, useful for the study of environmental sciences, planetology and astrophysics. The Van Vleck contact transformation method, described in Volume 1, is applied in the calculation and analysis of IR transitions between vibration–rotation energy levels. The extended Lakhlifi–Dahoo substitution model is used in the framework of Liouville’s formalism and the line profiles of triatomic molecules and their isotopologues subjected to environmental constraints are calculated by applying the cumulant expansion. The applications presented in this book show how interactions at the molecular level modify the infrared spectra of triatomics trapped in a nano-cage (substitution site of a rare gas matrix, clathrate, fullerene, zeolite) or adsorbed on a surface, and how these interactions may be used to identify the characteristics of the perturbing environment.

Molecular Spectroscopy Modern Research

Molecular Spectroscopy  Modern Research Book
Author : K.N. Rao
Publisher : Elsevier
Release : 2012-12-02
ISBN : 0323149324
Language : En, Es, Fr & De

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Book Description :

Molecular Spectroscopy: Modern Research, Volume III is a collection of papers presented at the 40th Annual Molecular Spectroscopy Symposium, held at the Ohio State University. The contributors of this seven-chapter text cover the significant advances in molecular spectroscopic research and their application in chemistry. Chapters 1 and 2 discuss first the higher-order vibration-rotation interactions in molecules and then present formulas and an insight into the direction being taken in theoretical pursuits. Chapter 3 provides an extensive compilation of published intensity and collision broadening parameters derived from infrared spectra. This chapter also contains a detailed discussion using consistent notation of some of the methods commonly applied to extract such information from laboratory spectra. Chapter 4 examines a variety of laser systems and their application in investigations involving triatomic free radicals and ions, while chapter 5 considers the developments in the microwave spectroscopic studies on nonpolar molecules when their symmetry is reduced by isotopic substitution. Chapter 6 emphasizes the quasi-linear molecular problem to develop an appreciation of the symptoms of quasi-linearity and theoretical treatments thereof. This chapter also examines the increasing role of highly resolved spectra in the interpretation of various large-amplitude motions in molecules. Lastly, Chapter 7 describes the electric multipolar moments of hydrogen and its isotopes. Spectroscopists, chemists, and researchers will find this work invaluable.

Infrared Vibration Rotation Spectroscopy

Infrared Vibration Rotation Spectroscopy Book
Author : Geoffrey Duxbury
Publisher : Wiley
Release : 2000-02-03
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Written by an author internationally renowned in the field of molecular spectroscopy, this book provides an up-to-date account of the new experimental and theoretical methods on the high resolution infrared spectroscopy of small molecules. The approach uses a visual approach to spectral analysis, containing large numbers of energy level diagrams and spectra specra to show the progress in identification and line assignment. Covering new and important techniques on laser and Fourier Transform, it also contains both theoretical and experimental chapters. Divided into 3 parts, features covered in the first part include: * Calculations of the vibration-rotation energy levels of rigid and non-rigid molecules * Calculations of the intensities of vibration-rotation transitions * Introduction to linear and non-linear molecular spectroscopy * Use of interferometric and laser spectrometers for measuring infrared spectra The second part presents a detailed treatment of the analysis of the high resolution vibration-rotation spectra of linear, quasilinear, symmetric rotor and asymmetric rotor molecules. In the final part of the book the following topics of current interest are examined in depth: * Electric and magnetic resonance spectroscopy * Spectroscopy of transient species, free radicals and ions, and Van der Waals clusters * Atmospheric and astrophysical spectroscopy, including the spectroscopy of the atmosphere of the Earth and nearby planets, cool stars and molecules in the interstellar medium This comprehensive book is an essential reference for researchers who want to be at the cutting edge in the field of spectroscopy and physical chemistry, atmospheric science and infrared astonomy.

Introduction to Infrared and Raman Spectroscopy

Introduction to Infrared and Raman Spectroscopy Book
Author : Norman Colthup
Publisher : Elsevier
Release : 2012-12-02
ISBN : 032316160X
Language : En, Es, Fr & De

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Book Description :

Introduction to Infrared and Raman Spectroscopy focuses on the theoretical and experimental aspects of infrared and Raman spectroscopy, with emphasis on detailed group frequency correlations and their vibrational origin. Topics covered include vibrational and rotational spectra, molecular symmetry, methyl and methylene groups, triple bonds and cumulated double bonds, and olefin groups. Aromatic and heteroaromatic rings are also considered, along with carbonyl compounds and molecular vibrations. This book is comprised of 14 chapters and begins with a discussion on the use of Raman and infrared spectroscopy to study the vibrational and rotational frequencies of molecules, paying particular attention to photon energy and degrees of freedom of molecular motion. The quantum mechanical harmonic oscillator and the anharmonic oscillator are described. The next chapter focuses on the experimental techniques and instrumentation needed to measure infrared absorption spectra and Raman spectra. Symmetry is then discussed from the standpoint of the spectroscopist. The following chapters explore the vibrational origin of group frequencies, with an emphasis on mechanical effects; spectra-structure correlations; and the spectra of compounds such as ethers, alcohols, and phenols. The final chapter demonstrates how the frequencies and forms of a nonlinear molecule's normal modes of vibration may be calculated mathematically. This monograph will be a useful resource for spectroscopists and physical scientists.

Molecular Spectra and Molecular Structure Diatomic molecules

Molecular Spectra and Molecular Structure  Diatomic molecules Book
Author : Gerhard Herzberg
Publisher : Unknown
Release : 1939
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Molecular Spectra and Molecular Structure Diatomic molecules book written by Gerhard Herzberg, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Modern Spectroscopy

Modern Spectroscopy Book
Author : J. Michael Hollas
Publisher : John Wiley & Sons
Release : 2013-04-11
ISBN : 1118681606
Language : En, Es, Fr & De

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Book Description :

The latest edition of this highly acclaimed title introduces the reader to a wide range of spectroscopies, and includes both the background theory and applications to structure determination and chemical analysis. It covers rotational, vibrational, electronic, photoelectron and Auger spectroscopy, as well as EXAFs and the theory of lasers and laser spectroscopy. * A revised and updated edition of a successful, clearly written book * Includes the latest developments in modern laser techniques, such as cavity ring-down spectroscopy and femtosecond lasers * Provides numerous worked examples, calculations and questions at the end of chapters

An Introduction to Infrared Spectroscopy

An Introduction to Infrared Spectroscopy Book
Author : Werner Brugel,Werner Brügel
Publisher : Unknown
Release : 1962
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download An Introduction to Infrared Spectroscopy book written by Werner Brugel,Werner Brügel, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Molecular Spectroscopy and Brillouin Scattering

Molecular Spectroscopy and Brillouin Scattering Book
Author : D. H. Rank,PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF PHYSICS.
Publisher : Unknown
Release : 1972
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The report consists of a series of three papers on high resolution infrared spectroscopy and two papers on Brillouin scattering. The first three discuss the rotational structure observed in the spectrum of the dimer of HF and comments on the structure of (HF)2. For acetylene two papers gove the results of extensive work on the molecular constants with particular emphasis on the bending modes with new data from the 5 micrometers region. The papers on Brillouin scattering review the pre-laser status of this scattering and present new information on sound speeds, breakdown, stikulated gain and the phonon lifetime in the plastics polymethylmethacrylate and polyethylmethacrylate. (Author).

Molecular Spectra and Molecular Structure Spectra of diatomic molecules

Molecular Spectra and Molecular Structure  Spectra of diatomic molecules Book
Author : Gerhard Herzberg
Publisher : Unknown
Release : 1950
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Molecular Spectra and Molecular Structure Spectra of diatomic molecules book written by Gerhard Herzberg, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Catalog of National Bureau of Standards Publications 1966 1976

Catalog of National Bureau of Standards Publications  1966 1976 Book
Author : United States. National Bureau of Standards
Publisher : Unknown
Release : 1978
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Catalog of National Bureau of Standards Publications 1966 1976 book written by United States. National Bureau of Standards, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Infrared and Raman Spectra of Polyatomic Molecules

Infrared and Raman Spectra of Polyatomic Molecules Book
Author : Gerhard Herzberg
Publisher : Unknown
Release : 1945
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Infrared and Raman Spectra of Polyatomic Molecules book written by Gerhard Herzberg, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Advances in Molecular Spectroscopy

Advances in Molecular Spectroscopy Book
Author : A. Mangini
Publisher : Elsevier
Release : 2013-09-17
ISBN : 1483226751
Language : En, Es, Fr & De

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Book Description :

Advances in Molecular Spectroscopy, Volume 1 covers the proceedings of the Fourth Meeting of Molecular Spectroscopy, held in Bologna, Italy on September 7-12, 1959. This book is organized into three parts encompassing 69 chapters. The first part presents first some experimental and correlations studies on molecular structure, followed by discussions on the application of molecular spectroscopic techniques for molecular structure determination. Part II reviews experimental determination of Raman intensities, vibrations of aromatic rings, and IR spectra and electronic structure of various organic compounds. Part III considers the general theories on molecular spectroscopy. This topic is followed by surveys on electron energy, orbital valency, relations among potential energy of diatomic molecules, and determination of rotation structure. This book will be of value to molecular spectroscopists and analytical and organic chemists.