Synthesis, Characterization, and Optical Properties of Monodisperse Chiral Oligofluorenes
作者:Yanhou Geng、Anita Trajkovska、Dimitris Katsis、Jane J. Ou、Sean W. Culligan、Shaw H. Chen
DOI:10.1021/ja026165k
日期:2002.7.1
The first series of monodisperse chiral oligofluorenes was synthesized and characterized. Chain length was found to play an important role in solid morphology. Whereas dimer through tetramer are amorphous, pentamer through hexadecamer all show cholesteric mesomorphism with varying degrees of morphological stability against crystallization. Pristine spin-cast films, approximately 90 nm in thickness