Accession Number : ADA187890

Title :   Photophysics and Photochemistry of Poly(Di-n-Hexylsilane) in Room Temperature Solution,

Corporate Author : IBM ALMADEN RESEARCH CENTER SAN JOSE CA

Personal Author(s) : Michl, J. ; Downing, J. ; Karatsu, T. ; Klingensmith, K. A. ; Wallrath, G. H.

Report Date : 13 NOV 1987

Pagination or Media Count : 21

Abstract : Polysilane high polymers represent a new class of radiation sensitive polymers which are receiving considerable attention because of their curious spectroscopic properties and the development of a number of new applications. The lowest singlet excitation is sigma type, is localized in all-trans segments, and travels rapidly along the polymer backbone from shorter to longer segments. This energy transfer is competitive with fluorescence and polymer chain scission. The lengths of the low energy emitting segments of poly(di-n-hexylsilane) in solution have been estimated at 10-20 Si units. The reactions subsequent to chain scission are complex and poorly understood, but it is certain that complex silicon based radicals are formed. Keywords: Polysilanes, Solution spectroscopy, Theoretical studies, Polymer structure.

Descriptors :   *EMISSION, *POLYMERS, *POLYSILANES, *RADIATION, CHEMICAL RADICALS, FLUORESCENCE, LOW ENERGY, ROOM TEMPERATURE, SENSITIVITY, SILICON, SOLUTIONS(GENERAL), SPECTROSCOPY, THEORY.

Subject Categories : Organic Chemistry
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE