[×ÊÔ´] ÍƼö¡¶The Jahn-Teller Effect in C60 and Other Icosahedral Complexes¡·

The Jahn-Teller Effect in C60 and Other Icosahedral Complexes By C. C. Chancey, M. C.M. O'Brien -------------------------------------------------------------------------------- Publisher:   Princeton University Press Number Of Pages:   225 Publication Date:   1997-11-24 ISBN-10 / ASIN:   0691044457 ISBN-13 / EAN:   9780691044453 Binding:   Hardcover -------------------------------------------------------------------------------- Book Description: Because of the high symmetry involved, the Jahn-Teller effect is the natural starting point for considering electron-phonon (or vibronic) interactions in icosahedral molecules. This work is the first comprehensive theoretical analysis of the Jahn-Teller interaction in C60 and other icosahedral complexes. The importance of this research derives in part from the increasing, widespread interest in C60 and other molecular clusters and their application in science and industry. The electrical and spectroscopic properties of fullerene and fulleride compounds depend intimately on the coupling between the electronic and vibrational modes of these systems, and this book addresses the fundamental theoretical questions. In particular, a chapter is devoted to the connection between the theory and experimental observations, such as ESR (electron spin resonance) effects and molecular spectra. Earlier books have discussed the theory of Jahn-Teller interactions in lower symmetry structures (cubic, tetrahedral, tetragonal, trigonal,...); this is the first that focuses on the new icosahedral systems, whose most famous example is Buckminsterfullerene, C60. The book's authors have over fifty years of combined research experience into the theoretical aspects of the Jahn-Teller effect. -------------------------------------------------------------------------------- Summary: THE JAHN-TELLER EFFECT IN C60 AND OTHER ICOSAHEDRAL COMPLEXE Rating: 5 The Jahn-Teller theorem was presented in 1936, however, the first clear experimental evidence of a Jahn-Teller system was provided only in 1952. Moreover, early experimental and theoretical works had concentrated on systems possessing symmetries that were octahedral or lower; icosahedral systems were very rare and exotic. Interestingly enough, the oldest known work on the icosahedral symmetry and molecular spectra (L. Tisza, Z. Phys. 82, 48, 1933 - not quoted in the book), published when no icosahedral molecules were known, acknowledges a help from E. Teller. The discovery of the C60 molecule has however focused interest on the icosahedral Jahn-Teller systems as many cations and anions of C60 are Jahn-Teller active. The new book presents a comprehensive survey of the topic. This volume is the first book that focuses on the icosahedral systems themselves and the authors based it on decades of their own research experience in the Jahn-Teller effect. The book is divided into six chapters on 153 pages, followed by eight appendixes on 45 pages. The introductory part places C60 into a wider context of boron-rich solids containing B12 or B84 clusters, B12H12, smaller and higher fullerenes like C20 and C80, icosahedral structures with 13, 19, 55, and 147 atoms in xenon clusters, the smallest icosahedral systems Si13, Na13, or Mg13, and the Berry phase. The following four chapters will be enjoyed be specialists as they systematically discuss various conceptual and theoretical aspects of icosahedral systems and their Jahn-Teller behavior in general (icosahedral symmetry and its effects; triplets; quartets; quintets). The last and the longest chapter represents a bridge to experiments. Electron spin resonance, vibrational, and electronic spectra are discussed and illustrated on observed data. Although the discussion is mostly directed towards the Jahn-Teller effects in isolated icosahedral complexes, the chapter closes with molecular crystals and superconductivity in the fullerides. High-temperature superconductivity has indeed enhanced interest in vibronic coupling. The well prepared and produced book is of a primary interest of fullerene theoreticians and spectroscopists. However, its introductory and application parts appeal to the whole fullerene community. ISBN 0-691-04445-7 Summary: Nicely written monograph...highly readable Rating: 5 Quoted from a book review by Dr. Robert Silbey (MIT), Journal of the American Chemical Society, Vol. 120, No. 48 (December 1998): "This is a nicely written monograph that could also be used in a one-term course of vibronic coupling effects in molecules and solids for students with a background of standard quantum mechanics for physical chemistry. It begins with an introduction to the Jahn-Teller effect in lower symmetry systems and proceeds to discuss icosahedral symmetry and its effects. Until fairly recently, icosahedral symmetry [I_h] was of course only of academic interest; this changed dramatically with the discovery of C_60. The authors of this book have treated the effects of this symmetry on the spectra and properties of icosahedral complexes in an elegant and complete manner. The book consists of six chapters and eight appendices. The first two are introductory, consisting of a short introduction to the Jahn-Teller effect and to the icosahderal group. The next three chapters theoretically treat the electronic triplets, quartets, and quintets of the I_h group, respectively. The adiabatic potential energy surfaces are treated clearly and completely. The authors then go on to take the "bridge to experiment" in a long but very well-written chapter, in which they discuss multimode effects, electron paramagnetic resonance, and the spectra of the ions of C_60, and finally make a few remarks on superconductivity in the fullerides. The appendices are useful and complete, containing discoussions of the adiabatic approximation and quantum tunneling and good discussion of various mathematical aspects of the Jahn-Teller problem. I recommend this book either as a highly readable monograph or as a text for advanced students in chemistry." ÏÂÔØÁ´½Ó http://rs70.rapidshare.com/files ... edral_Complexes.rar

»Ø¸´´ËÂ¥