Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 131, Issue 11, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3225202
Keywords
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Funding
- Japan Society for the Promotion of Science (JSPS) [21350011, 20655003]
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [18066010]
- global COE (center of excellence) program Global Education and Research Center for Bio-Environmental Chemistry of Osaka University
- Supramolecular Chemistry and Supramolecular Catalysis [P5-03]
- Grants-in-Aid for Scientific Research [18066010, 21350011] Funding Source: KAKEN
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Remarkable enhancement of two-photon absorption (TPA) peak is theoretically predicted in symmetric open-shell singlet diradical systems with intermediate diradical character as compared to closed-shell and pure diradical systems. It is revealed that the largest TPA peak intensities occur for open-shell singlet diradicals having a ferromagnetically coupled ground state and strongly depend on the ratio between damping factors of the excited states. This result confirms that open-shell singlet conjugated molecules with intermediate diradical characters have precedence over conventional closed-shell conjugated systems in resonant third-order nonlinear optical properties. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3225202]
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