Spectral multitude and spectral dynamics reflect changing conjugation length in single molecules of oligophenylenevinylenes.
Single-molecule study of phenylenevinylene oligomers revealed distinct spectral forms due to different conjugation lengths which are determined by torsional defects. Large spectral jumps between different spectral forms were ascribed to torsional flips of a single phenylene ring. These spectral changes reflect the dynamic nature of electron delocalization in oligophenylenevinylenes and enable estimation of the phenylene torsional barriers.
Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama 2-12-1-S8, Meguro-ku, Tokyo 152-8552, Japan.
Hiroyuki
H
Kobayashi
Kousuke
K
Tsuchiya
Kenji
K
Ogino
Martin
M
Vacha