Accession Number:

ADA199097

Title:

Poly(Bis-Alkoxyphenylsilanes): Thermo and Solvatochromic Behavior

Descriptive Note:

Technical rept.

Corporate Author:

IBM ALMADEN RESEARCH CENTER SAN JOSE CA

Personal Author(s):

Report Date:

1988-08-01

Pagination or Media Count:

13.0

Abstract:

The first soluble polybis alkoxyphenylsilanes have been prepared and characterized. The UV spectra of the bis-p-alkoxyphenyl derivatives show a strong absorption at unexpectedly short wavelengths. These materials are thermochromic and at higher temperatures their spectra resemble those reported for the bis p-alkylphenyl derivatives. On the basis of these results, we propose that the silicon backbone of the polybis-p-alkoxyphenylsilanes is substantially nonplanar at room temperature possibly due to unfavorable dipolar substituent interactions in the planar zigzag form. This suggestion is supported by studies on the corresponding m-alkoxyphenyl derivatives and unsymmetrical alkoxphenyl substituted diaryl polysilanes. These latter materials also show solvatochromic spectral changes due to conformer redistribution. Absorption characteristics, Chain conformations, Solvatochromism, Silanes, Phenyl radicals.

Subject Categories:

  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE