ISSN:
0268-2605
Keywords:
organosilicon
;
polymers
;
semiconducting
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A series of organosilicon polymers containing polysilane and diethynylaryl units along the polymer backbone were synthesized and examined with respect to their optical absorptions. The results indicate that delocalization takes place through the σ-π conjugated system. Lengthening of π-conjugation leads to lower excitation energies while nearly identical UV-vis spectra are observed with increased Si-Si chain length. Introducing a thiophene unit into the π-system instead of a benzene unit leads to a bathochromic shift reflecting greater σ-π delocalization. The polymers undergo photodegradation, probably via cleavage of the Si-Si bonds, and thermal crosslinking by reaction at the C≡C triple bonds. When doped with iodine, these polymers become semiconducting with conductivity of the order of 10-4 S cm-1.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aoc.590080417
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