Journal
ORGANIC LETTERS
Volume 11, Issue 15, Pages 3426-3429Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol9012734
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Funding
- National Natural Science Foundation of China [50603001, 20774005]
- Ministry of Science and Technology of China [2006CB921600]
- Fok Ying-Tung Educational Foundation [114008]
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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.
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