期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 110, 期 51, 页码 25590-25592出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp0673361
关键词
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A model for aggregates of quadrupolar (DAD or ADA) molecules is presented that relaxes the dipolar approximation for intermolecular electrostatic interactions. New effects, including the appearance of bound biexcitons in clusters of nonpolar molecules, are predicted with interesting and unforeseen consequences on the material properties. Specifically, we show that the large two-photon absorption cross-section, typical of quadrupolar chromophores, can be further amplified by orders of magnitude as a result of aggregation.
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