Synthesis of twist-twist pi-conjugated di-sec-alkylstilbenes and stilbene polymers.
Twist-twist pi-conjugated (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 electronic segmentation for organic light emitting diode (OLED) studies.
Gano
James E
JE
Department of Chemistry, Bowman-Oddy Laboratories, University of Toledo, Toledo, Ohio 43606, USA. jgano@frii.com
Osborn
D J
DJ
Kodali
Nagendra
N
Sekher
Padmanabhan
P
Liu
Min
M
Luzik
Eddie D
ED