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S-2 emission from chemically modified BODIPYs
- Authors
- Cho, Dae Won; Fujitsuka, Mamoru; Ryu, Jung Ho; Lee, Myoung Hee; Kim, Hwan Kyu; Majima, Tetsuro; Im, Chan
- Issue Date
- 2012
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- CHEMICAL COMMUNICATIONS, v.48, no.28, pp.3424 - 3426
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL COMMUNICATIONS
- Volume
- 48
- Number
- 28
- Start Page
- 3424
- End Page
- 3426
- ISSN
- 1359-7345
- Abstract
- Novel boron dipyrromethene (BODIPY) derivatives having significant absorption and emission in the longer wavelength region were synthesized. BODIPY showed anomalous S-2 emission from the second excited (S-2) state at shorter wavelength. The photodynamics of the S-2 state was investigated by fluorescence up-conversion and transient absorption spectroscopic measurements. The decay time of the S-2 emission was dependent on the internal conversion and the intersystem crossing process. The assignments of transitions were supported by a theoretical calculation based on the time-dependent density functional theory.
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