Citation:
Yan, Q. ; Zhao, D. *. Conjugated Dimeric and Trimeric Perylenediimide Oligomers. Org. Lett. 2009, 11, 3426-3429.
摘要:
Dimeric and trimeric molecules comprising perylenediimide units conjugatively linked by phenylene, ethynylene, or a butadiynylene spacer via the bay positions were prepared. Electrochemical and photophysical characterizations showed that oligomers connected by C-C triple bond(s) exhibited effectively lowered LUMO compared to the monomer. Molecular modeling confirmed that the C-C triple bond realized efficient delocalization of frontier orbitals, while phenylene was less competent in extending the conjugation, partially due to steric interactions.See also: 2009