Citation: . SYNTHESIS AND OPTICAL PROPERTIES OF POLY (THIENYLACETYLENES)*[J]. Chinese Journal of Polymer Science, ;1999, 17(1): 81-86. shu

SYNTHESIS AND OPTICAL PROPERTIES OF POLY (THIENYLACETYLENES)*

Received Date: 17 March 1998

3 -Ethynyl-4-(trimethylsilyl)thiophene (1a) and 3 -ethynyl-4-bromothiophene (1 b ) selectivelyundergo acetylene polymerizations in the presence of the MoCl5- and WCl6-Ph3SiH catalysts to give soluble,high-molecular-weight poly(thienylacetylenes) (2) (Mw up to 602000) in high yields (up to 100%). Lighttransmission spectra of THF solutions of 2 continuously red-shift with increasing concentration. Theconcentratochromism shows a logarithmic concentration dependence; that is, the optical transitions of 2 are predictably tunable by simply changing their concentrations.
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