Synthesis of Twist−Twist π-Conjugated Di-<i>sec</i>-alkylstilbenes and Stilbene Polymers
作者:James E. Gano、D. J. Osborn、Nagendra Kodali、Padmanabhan Sekher、Min Liu、Eddie D. Luzik
DOI:10.1021/jo0204505
日期:2003.5.1
(TTPC) pi systems promise unique properties with their 90 degrees twist angles. Di-sec-alkyl substituted stilbenes, 5, were prepared by low-valent titanium coupling of phenyl ketones, 4. Long alkyl chains stopped the coupling reaction. Stilbenes 5 were shown to be approximately 90% TTPC. Inserting TTPC units into poly(p-phenylene) polymers created highly fluorescent, soluble, TTPC pi systems with weak