期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 5, 期 15, 页码 2588-2593出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz5011797
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- Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, DOE [DE-FG02-99ER14999]
- Camille and Henry Dreyfus Postdoctoral Program in Environmental Chemistry
Energy transfer in perylene-3,4:9,10-bis(dicarboximide) (PDI) aggregates is often limited by formation of a low-energy excimer state. Formation dynamics of excimer states are often characterized by line shape changes and peak shift dynamics in femtosecond visible transient absorption spectra. Femtosecond near-infrared transient absorption experiments reveal a unique low-energy transition that can be used to identify and characterize this state without overlapping excited singlet-state absorption. Three covalently bound PDI dimers with differing PDI-PDI distances were studied to probe the influence of interchromophore electronic coupling on the PDI excimer transient spectra and dynamics.
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