On the rigidity of polynorbornenes with dipolar pendant groups.
A range of polynorbornenes (PNBs) with fused dipolar pendant groups at C-5,6 positions was synthesized by ring-opening metathesis polymerization catalyzed by a ruthenium carbene complex (Grubbs I). Photophysical studies, EFISH measurements, and atomic force microscopy images have been used to investigate the structures and morphology of these polymers. These results suggest that the polymers may adopt rigid rod-like structures. The presence of the double bonds in PNBs appeared to be indispensable for the rigidity of the polymers. Interaction between unsaturated pendant groups may result in coherent alignment leading to a rod-like structure.
Lin
Wei-Yu
WY
Department of Chemistry, National Taiwan University, Taipei 106, Taiwan.
Murugesh
Modachur G
MG
Sudhakar
Sundarraj
S
Yang
Hsiao-Ching
HC
Tai
Hwan-Ching
HC
Chang
Chia-Seng
CS
Liu
Yi-Hung
YH
Wang
Yu
Y
Chen
I-Wen Peter
IW
Chen
Chun-Hsien
CH
Luh
Tien-Yau
TY