期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 47, 页码 19125-19130出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja205868b
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资金
- National Science Foundation [CHE-1057884, CRC-0526864, CHE-0216371]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1057884] Funding Source: National Science Foundation
The self-assembly of bolaamphiphile 1 into nanotubes containing a nanostructured electron donor/acceptor heterojunction is reported. In 10% MeOH/H2O, the tetraphenylporphyrin (TPP) and 1,4,5,8-naphthalenetetracarboxylic acid diimide chromophores engage in strong J-type pi-pi interactions within monolayer rings that further stack into the nanotube assemblies. In 10% MeOH/H2O at pH 1 or 11 or in pure MeOH, assembly is driven exclusively by the TPP ring, leading to the formation of nonspecific, unstructured aggregates. Steady-state, time-resolved fluorescence and femtosecond transient absorption spectroscopy revealed a strong dependence of the fluorescence decay and electron-transfer/charge-recombination time constants on the nature of the assemblies. These studies highlight the importance of local nanostructure in determining the photophysical properties of optoelectronic materials.
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