Physical Aspects of Radiation-Induced Processes on SiO2, γ-Al2O3, Zeolites, and Clays
Physical Aspects of Radiation-Induced Processes on SiO2, γ-Al2O3, Zeolites, and Clays
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DOI:
10.1021/cr020378a
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发表时间:
2005-04
期刊:
影响因子:
62.1
通讯作者:
J. K. Thomas
中科院分区:
文献类型:
--
作者:
J. K. Thomas
There is a wealth of information on many aspects of the photophysics, photochemistry, and radiation chemistry of many molecular systems in solution, where events are now described from femtoseconds to ambient time, or stable products. For the most part the observed radiation-induced chemistry is determined by the properties of the system and is inviolate. However, the chemistry may be directed into areas of great utility via organized assemblies. The aim of photochemists for over three decades1-5 has been to mimic nature and design chemical systems that direct the photochemistry to useful ends. Numerous examples of exciting new concepts in chemistry have been developed, and this has contributed to the successful design of solar harvesting devices. 6 Further work is now underway in this arena of research. These studies of small particle or colloid photochemistry are now masquerading under the banner of nanochemistry. In early designs, advantage was taken of various micellar systems to promote the photochemistry of hydrophobic molecules in aqueous media. The interface of the microparticles was also used as a mode of separating charged products. Today the established field of colloid chemistry plays host to photochemistry, synthesis of nanoparticles, etc. 7 It was soon realized that the energetic chemistry produced on photolysis of organic systems led to damaging side effects on the compo-John Kerry Thomas was born in Wales in 1934. He attended the University of Manchester in England from 1951 to 1957, when he obtained a B. Sc. degree in 1954 and a Ph. D. in 1957. His graduate work on the photoand X-ray degradation of polymers was supervised by Dr. JH Baxendale, a notable kineticist. From 1957 to 1958 he was a postdoctoral fellow at the National Research Council in Ottawa, Canada. He returned to Harwell, England, as a Scientific Officer in 1958, where he carried out work on radiation-induced surface graft polymerization. In 1960 he joined the Argonne National Laboratory in Illinois, where he remained until 1970. It was there that he developed the short-pulsed nanosecond laser and pulse radiolysis techniques, which are so popular in physical chemistry today. With these techniques he studied the fundamental chemical processes induced by radiation. In 1970 he went to the University of Notre Dame as a professor of chemistry. In 1969 he was awarded an honorary Doctor of Science by the University of Manchester; in 1974 he was given the research award of the Radiation Research Society; and he was a Gäst Professor at the Hahn Meitner Institute in Berlin in 1975. He was appointed Julius A. Nieuwland CSC Professor of Chemistry in 1984. He has been the recipient of the Award in Colloid or Surface Chemistry sponsored by the Procter and Gamble Co. in 1993. He is the author of over three hundred research papers and review articles and an ACS Monograph 181,“Chemistry of Excitation at Interfaces”. This text describes in some detail Dr. Thomas’s application of pulsed photochemical methods to investigate reactions at interfaces as well as the nature of the interfaces themselves. Dr. Thomas has established many of the original concepts used in this fast growing field of reactions in organized or constrained media with its many applications to storage of energy, biokinetics, and catalysis. He is a member of the American Chemical Society, a Fellow of the Royal Society of Chemistry, the Photobiology Society, and the Society for Radiation Research, where has been a member of the council. He has served on the Editorial Board of the Journal for Radiation Research and presently serves on the Editorial Board of Chemical …