Electronic Absorption Spectra And Geometry Of Organic Molecules

Author : Hiroshi Suzuki
Publisher : Elsevier
Page : 582 pages
File Size : 52,6 Mb
Release : 2012-12-02
Category : Science
ISBN : 9780323145268

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Electronic Absorption Spectra and Geometry of Organic Molecules by Hiroshi Suzuki Pdf

Electronic Absorption Spectra and Geometry of Organic Molecules: An Application of Molecular Orbital Theory focuses on electronic absorption spectra of organic compounds and molecules. The book begins with the discussions on molecular spectra, electronic absorption spectra of organic compounds, and practical measures of absorption intensity. The text also focuses on molecular orbital theory and group theory. Molecular state functions; fundamental postulates of quantum theory; representation of symmetry groups; and symmetry operations and symmetry groups are described. The book also discusses shape of absorption bands and geometry of excited electronic states; effect of environment on electronic absorption spectra; and the application of simple LCAO MO method to simple π systems. An evaluation of the parameters used in simple LCAO MO method is presented. The text notes the usefulness and restrictions of simple LCAO MO method in the interpretation of electronic absorption spectra. The correlation between results of simple MO calculation and spectral data in aromatic hydrocarbons, and correlation between results of simple MO calculation and spectral data in conjugated linear polyenes are discussed. The book also looks at MO methods and the relations between electronic absorption spectra and geometry of molecules, biphenyl, styrene, and related compounds. The text is a good source of data for researchers and chemistry students who want to study electronic absorption spectra.

Author : Albert Edward Gillam,Edward Severin Stern
Publisher : Unknown
Page : 304 pages
File Size : 50,8 Mb
Release : 1954
Category : Absorption spectra
ISBN : RUTGERS:39030008977656

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An Introduction to Electronic Absorption Spectroscopy in Organic Chemistry by Albert Edward Gillam,Edward Severin Stern Pdf

Author : John Norman Murrell
Publisher : Unknown
Page : 352 pages
File Size : 46,8 Mb
Release : 1971
Category : Hydrocarbons
ISBN : UOM:39076006380674

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The Theory of the Electronic Spectra of Organic Molecules by John Norman Murrell Pdf

Author : D. N. Sathyanarayana
Publisher : Universities Press
Page : 556 pages
File Size : 41,5 Mb
Release : 2001
Category : Absorption spectra
ISBN : 8173713715

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Electronic Absorption Spectroscopy and Related Techniques by D. N. Sathyanarayana Pdf

This book provides a conceptual and experimental basis for the interpretation of electronic absorption spectroscopy and related techniques. The basic theories, instrumentation and interpretation of the spectra of organic and coordination compounds for structural studies are presented step-by-step, in an easily understandable style. related topics of emission spectroscopes are covered as well.

Author : Albert Edward Gillam,Edward Severin Stern,Christopher John Timmons
Publisher : Hodder Education
Page : 296 pages
File Size : 47,7 Mb
Release : 1970
Category : Science
ISBN : STANFORD:36105031273811

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Gillam and Stern's Introduction to Electronic Absorption Spectroscopy in Organic Chemistry by Albert Edward Gillam,Edward Severin Stern,Christopher John Timmons Pdf

Author : Petr Klán,Jakob Wirz
Publisher : John Wiley & Sons
Page : 583 pages
File Size : 42,9 Mb
Release : 2009-03-23
Category : Science
ISBN : 9781405190886

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Photochemistry of Organic Compounds by Petr Klán,Jakob Wirz Pdf

Photochemistry of Organic Compounds: From Concepts to Practice provides a hands-on guide demonstrating the underlying principles of photochemistry and, by reference to a range of organic reaction types, its effective use in the synthesis of new organic compounds and in various applications. The book presents a complete and methodical approach to the topic, Working from basic principles, discussing key techniques and studies of reactive intermediates, and illustrating synthetic photochemical procedures. Incorporating special topics and case studies covering various applications of photochemistry in chemistry, environmental sciences, biochemistry, physics, medicine, and industry. Providing extensive references to the original literature and to review articles. Concluding with a chapter on retrosynthetic photochemistry, listing key reactions to aid the reader in designing their own synthetic pathways. This book will be a valuable source of information and inspiration for postgraduates as well as professionals from a wide range of chemical and natural sciences.

Author : K. C. Smith
Publisher : Springer Science & Business Media
Page : 431 pages
File Size : 47,9 Mb
Release : 2013-11-11
Category : Science
ISBN : 9781468417135

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The Science of Photobiology by K. C. Smith Pdf

Although there are several excellent books covering a few of the specialized areas of photobiology, at the present time there is no book that covers all areas of the science of photobiology. This book attempts to fill this void. The science of photobiology is currently divided into 14 subspecialty areas by the American Society for Photobiology. The first 14 chapters of this book deal with those subspecialty areas, each written by a leader in the field. Chapter 15, entitled "New Topics in Photobiology," highlights areas of research that may be desig nated sUbspecialties of photobiology in the future. This book has been written as a textbook to introduce the science of photobiology to advanced undergraduate and graduate students. The chapters are written to provide a broad overview of each topic. They are designed to contain the amount of information that might be presented in a one-to two-hour general lecture. The references are not meant to be exhaustive, but key refer ences are included to give students an entry into the literature. Frequently a more recent reference that reviews the literature will be cited rather than the first paper by the author making the original discovery. Whenever practical, a classroom demonstration or simple laboratory exercise has been provided to exemplify one or more major points in a chapter.

Author : J. Fabian,H. Hartmann
Publisher : Springer Science & Business Media
Page : 254 pages
File Size : 45,9 Mb
Release : 2013-11-11
Category : Science
ISBN : 9783642675874

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Light Absorption of Organic Colorants by J. Fabian,H. Hartmann Pdf

Although studies on synthetic dyes have been performed for more than 100 years, their detailed elucidation requires further extensive research. The discovery of novel high polymers, the necessity of supplying a whole range of shades and increasing require ments for dyestuffs of high fastness properties give rise to a permanent search for new dyes. Extensive investigations on dyes were also occasioned by various applications in the field of spectral sensitization and of staining of biological specimens. Another more recent development concerns the lasing properties of some organic dyes. Most of the progress, however, was only achieved by time-consuming, purely empirical approaches and theoretical understanding of the dye properties is only at its very beginnings. The color is the sine qua non of every dye. For this reason organic chemists and color chemists have looked for relations between the "color and constitution" of dye molecules for a long time. This knowlege as a whole is known as "theory of color". The classic theory of color was established abou t 100 years ago by Witt and was signi ficantly extended 50 years later by W. Konig.

Author : Wolfgang Tress
Publisher : Springer
Page : 464 pages
File Size : 52,7 Mb
Release : 2014-11-22
Category : Technology & Engineering
ISBN : 9783319100975

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Organic Solar Cells by Wolfgang Tress Pdf

This book covers in a textbook-like fashion the basics or organic solar cells, addressing the limits of photovoltaic energy conversion and giving a well-illustrated introduction to molecular electronics with focus on the working principle and characterization of organic solar cells. Further chapters based on the author’s dissertation focus on the electrical processes in organic solar cells by presenting a detailed drift-diffusion approach to describe exciton separation and charge-carrier transport and extraction. The results, although elaborated on small-molecule solar cells and with focus on the zinc phthalocyanine: C60 material system, are of general nature. They propose and demonstrate experimental approaches for getting a deeper understanding of the dominating processes in amorphous thin-film based solar cells in general. The main focus is on the interpretation of the current-voltage characteristics (J-V curve). This very standard measurement technique for a solar cell reflects the electrical processes in the device. Comparing experimental to simulation data, the author discusses the reasons for S-Shaped J-V curves, the role of charge carrier mobilities and energy barriers at interfaces, the dominating recombination mechanisms, the charge carrier generation profile, and other efficiency-limiting processes in organic solar cells. The book concludes with an illustrative guideline on how to identify reasons for changes in the J-V curve. This book is a suitable introduction for students in engineering, physics, material science, and chemistry starting in the field of organic or hybrid thin-film photovoltaics. It is just as valuable for professionals and experimentalists who analyze solar cell devices.

Author : United States. Environmental Protection Agency. Library Systems Branch
Publisher : Unknown
Page : 702 pages
File Size : 47,8 Mb
Release : 1974
Category : Environmental protection
ISBN : UCR:31210012859458

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U.S. Environmental Protection Agency Library System Book Catalog Holdings as of July 1973 by United States. Environmental Protection Agency. Library Systems Branch Pdf

Author : James P. Snyder
Publisher : Elsevier
Page : 448 pages
File Size : 55,8 Mb
Release : 2013-10-22
Category : Science
ISBN : 9781483275659

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Nonbenzenoid Aromatics by James P. Snyder Pdf

Nonbenzenoid Aromatics, Volume II, provides an overview of the state of knowledge in the field of non-benzenoid aromatic compounds. The theme that threads its way through the six chapters is that of ""aromaticity,"" with each author making an effort to evaluate this concept in light of his own work. It is with this in mind that this treatise was initiated with an historical account tracing the development of the idea up to the discovery of the electron. The book begins with discussions of the estimation of the thermochemical and kinetic stability of a system which has not yet been synthesized and the calculation of electronic spectra. This is followed by separate chapters on the electron spin resonance (ESR) spectra of radical ions of nonbenzenoid aromatics; the theoretical and empirical bases of exaltation; and treatment of cyclic (4n + 2) π-electron systems with six or more π-electrons and bearing one or more formal charges. Subsequent chapters deal with the chemical binding and delocalization in phosphonitrilic derivatives, and cyclobutadiene-metal complexes.

Author : A.L. Horvath
Publisher : Elsevier
Page : 1505 pages
File Size : 47,7 Mb
Release : 2012-12-02
Category : Science
ISBN : 9780444596734

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Molecular Design by A.L. Horvath Pdf

This book is a systematic presentation of the methods that have been developed for the interpretation of molecular modeling to the design of new chemicals. The main feature of the compilation is the co-ordination of the various scientific disciplines required for the generation of new compounds. The five chapters deal with such areas as structure and properties of organic compounds, relationships between structure and properties, and models for structure generation. The subject is covered in sufficient depth to provide readers with the necessary background to understand the modeling techniques. The book will be of value to chemists in industries involved in the manufacture of organic chemicals such as solvents refrigerants, blood substitutes, etc. It also serves as a reference work for researchers, academics, consultants, and students interested in molecular design.

Author : Gerald Segal
Publisher : Springer Science & Business Media
Page : 319 pages
File Size : 42,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781468425598

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Semiempirical Methods of Electronic Structure Calculation by Gerald Segal Pdf

If one reflects upon the range of chemical problems accessible to the current quantum theoretical methods for calculations on the electronic structure of molecules, one is immediately struck by the rather narrow limits imposed by economic and numerical feasibility. Most of the systems with which experimental photochemists actually work are beyond the grasp of ab initio methods due to the presence of a few reasonably large aromatic ring systems. Potential energy surfaces for all but the smallest molecules are extremely expensive to produce, even over a restricted group of the possible degrees of freedom, and molecules containing the higher elements of the periodic table remain virtually untouched due to the large numbers of electrons involved. Almost the entire class of molecules of real biological interest is simply out of the question. In general, the theoretician is reduced to model systems of variable appositeness in most of these fields. The fundamental problem, from a basic computational point of view, is that large molecules require large numbers of basis functions, whether Slater type orbitals or Gaussian functions suitably contracted, to provide even a modestly accurate description of the molecular electronic environment. This leads to the necessity of dealing with very large matrices and numbers of integrals within the Hartree-Fock approximation and quickly becomes both numerically difficult and uneconomic.

Author : Nina Berova,Prasad L. Polavarapu,Koji Nakanishi,Robert W. Woody
Publisher : John Wiley & Sons
Page : 884 pages
File Size : 41,5 Mb
Release : 2012-03-27
Category : Science
ISBN : 9781118012925

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Comprehensive Chiroptical Spectroscopy, Volume 2 by Nina Berova,Prasad L. Polavarapu,Koji Nakanishi,Robert W. Woody Pdf

This book provides an introduction to the important methods of chiroptical spectroscopy in general, and circular dichroism (CD) in particular, which are increasingly important in all areas of chemistry, biochemistry, and structural biology. The book can be used as a text for undergraduate and graduate students and as a reference for researchers in academia and industry. Experimental methods and instrumentation are described with topics ranging from the most widely used methods (electronic and vibrational CD) to frontier areas such as nonlinear spectroscopy and photoelectron CD, as well as the theory of chiroptical methods and techniques for simulating chiroptical properties. Applications of chiroptical spectroscopy to problems in organic stereochemistry, inorganic stereochemistry, and biochemistry and structural biology are also discussed, and each chapter is written by one or more leading authorities with extensive experience in the field.

Author : Jacek Waluk
Publisher : John Wiley & Sons
Page : 400 pages
File Size : 48,7 Mb
Release : 2000-06-13
Category : Science
ISBN : 0471297070

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Conformational Analysis of Molecules in Excited States by Jacek Waluk Pdf

A unique look at some of the hottest topics in photophysics and photochemistry today The study of molecules in excited states has exploded over the past decade, providing new insights into conformational changes in organic molecules and opening up research opportunities for scientists and professionals in chemistry, physics, biology, medicine, and materials engineering. Using conformational analysis as a unifying concept, this important new work provides readers with a cohesive and cutting-edge overview of this fascinating and challenging field. From conformational changes accompanying photoinduced electron transfer to elementary photophysical and photochemical processes in living systems, the most representative and challenging topics are carefully gleaned from the vast literature, highlighting major conceptual problems along with the relevant experimental techniques. Authoritative, detailed contributions from both experimentalists and theoreticians include coverage of: * Conformational changes in intramolecular excited state electron transfer * Conformational aspects of excited state proton transfer * The novel topic of solute-solvent friction in chemical reactions * Mechanisms and structural aspects of exciplex formations * Conformational aspects of organic photochemistry * Calculations of excited state conformational properties