期刊
MOLECULES
卷 15, 期 11, 页码 7582-7592出版社
MDPI
DOI: 10.3390/molecules15117582
关键词
Spirobifluorene; pyrene; fluorescence; pi-conjugation; dye
资金
- NEDO of Japan [09C46622]
We have synthesized a highly luminescent (log epsilon > 5.0, Phi > 0.9) pyrene dye based on a spirobifluorene skeleton [2,2',7,7'-tetrakis(7-tert-butyl-1-pyrenyl)-9,9'-spirobi[9H-fluorene; 4-PySBF]. The use of spirobifluorene prevents fluorescence quenching by intramolecular energy transfer and/or electron transfer among the chromophores in the excited state. The emission spectra of 4-PySBF exhibited a red shift of 20 nm in comparison to a model compound [9,9'-dioctyl-2,7-bis(7-tert-butyl-1-pyrenyl)-9H-fluorene; 2-PyF], but its UV-Vis spectrum remained unchanged.
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