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Photochemistry of Macromolecules: Proceedings of a Symposium by A. Douglas McLaren (auth.), Ronald F. Reinisch (eds.)

By A. Douglas McLaren (auth.), Ronald F. Reinisch (eds.)

Our wisdom of the photodegradation of polymers, chemical evolution, photosynthesis, visible notion and the organic results of sunshine relies seriously on our skill to explain the first photochemical strategies of macromolecules. This quantity brings jointly for the 1st time from the fields of average in addition to man made polymers a gaggle of stories facing macromolecular photochemistry. when you consider that macromolecular picture­ chemistry is an increasing new box that crosses the bounds among classical disciplines, the reader will come upon the employment of various medical ways and surprising terminology. although, it has develop into more and more obvious that researchers in those fields have a lot to benefit from one another. even supposing this publication isn't meant to offer an in depth survey of the photochemistry of macromolecules. it does characterize the editor's point of view at the courting among conception, kinetic reviews and the synthesis features of photochemistry. the guidelines expressed through the participants provide a worthy com­ posite of theoretical and experimental ways in case you are excited about difficulties that have photochemical relevance, and express that investigators from various fields percentage many recommendations and maybe a few universal difficulties. This novel array of current wisdom should still offer a foundation for organizing and figuring out photochemical info from chemistry, physics, biology and drugs. whereas of specific price to the examine employee, the ebook additionally will be of curiosity to the graduate scholar approximately to embark on an issue in macromolecular photograph­ chemistry.

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Extra info for Photochemistry of Macromolecules: Proceedings of a Symposium held at the Pacific Conference on Chemistry and Spectroscopy, Anaheim, California, October 8–9, 1969

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13. , and S. Abdulnur, Federation Proc. 2, Part lIl, Suppl. 15, S-12 (1965). - 14. , and E. Lodeman, Angew. Chem. Intern. Ed. 15. Zavil'gePskii, G. , B. N. Ilyashenko, and S. Ya. Dityatkin, Dok. Akad. Nauk, SSSR, 171, 732 (1966). 16. Tramer, Zofia, K. L. Wierzchowski, and D. Shugar, Acta Biochim. Polo~. 16, 83 (1969). 17. Hosszu, J. , and R. O. Rahn, Biochem. Biophys. Res. Commun. 29, 327 (1967). 18. Rahn,. R. , and J. L. Hosszu, Photochem. Photobiol. 19. Rahn, R. , J. K. Setlow, and J. L. Hosszu, Biophys.

2) This lower value is undoubtedly due to the reduced 43 ENERGY TRANSFER IN POLYMERIC KETONES Figure 2. Stern-Volmer Plot for Quenching of Naphthalene CONCENTRATION C=O GROUPS (moles r:-') mobility of the naphthalene in the solid matrix of the polymer. In fact if one assumes a constancy of the p factor, one can use these data to estimate kcliff and hence the diffusion coefficient D for naphthalene in polyet hylene by substitution in the Smoluchowski equation: ~iff = 41/r' DN 1000 where ;0 is the radius of the diffusing molecule, D is the diffusion coefficient and N is Avogadro's number.

Alcantara and S. Y. Wang, Photochem. Photobiol. 4, 473 (1965). S. Y. Wang and R. Alcantara, Photochem. Photobiol. 4, 477 (1965). C. Janion and D. Shugar, Acta Biochim. Polon. 14, 293 (1967). K. C. Smith, in Radiation Research (G. ) North Holland Publ. , Amsterdam (1967), p. 756. K. C. Smith, Biochem. Biophys. Res. Commun. 34, 354 (1969). ENERGY TRANSFER IN POLYMERIC KETONES IN THE SOLID PHASE M. Heskins and J. E. Guillet Department of Chemistry University of Toronto Toronto 181, Canada Energy transfer studies in polymeric systems have indicated that effective stabilization of polymer molecules against the action of ultra-violet radiation may be possible by this mechanism.

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