Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 121, Issue 28, Pages 15481-15488Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.7b05522
Keywords
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Funding
- National Science Foundation (NSF) [CHE-1362504, CHE-1411458, CHE-1300603]
- Camille Dreyfus Teacher-Scholar Award
- Alexander von Humboldt Foundation
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1411458] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1362504] Funding Source: National Science Foundation
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Encapsulation of dye molecules is used as a means to achieve charge separation across different dielectric environments. We analyze the absorption and emission spectra of several coumarin molecules that are encapsulated within an octa-acid dimer forming a molecular capsule. The water solvated capsule effect on the coumarin's electronic structure and absorption spectra can be understood as due to an effective dielectric constant where the capsule partially shields electrostatically the dielectric solvent environment. Blue shifted emission spectra are explained as resulting from a partial intermolecular charge transfer where the capsule is the acceptor, and which reduces the coumarin relaxation in the excited state.
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