Study of the photophysics and energy transfer of 9,10-diphenylanthracene in solution

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書誌事項

公開日
2000-08
権利情報
  • https://www.elsevier.com/tdm/userlicense/1.0/
  • https://www.elsevier.com/legal/tdmrep-license
DOI
  • 10.1016/s1010-6030(00)00322-1
公開者
Elsevier BV

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説明

Abstract Photophysics of 9,10-diphenylanthracene (DPA) in benzene solution was studied with time-resolved thermal lensing (TRTL) technique. The TRTL signal was composed of the fast and slow-rising components. The heat conversion efficiency, which is defined as the ratio of energy released as heat against energy absorbed, was determined to be 0.31±0.01, revealing that the fluorescence quantum yield is fairly large (0.88±0.03), while the quantum yield for triplet formation is quite small (0.04±0.02) by analyzing the slow component of the TRTL signal. The triplet–triplet (T–T) absorption of DPA in benzene appeared for the wavelength region of 420–470 nm, obtained by energy transfer with triplet benzophenone used as a photosensitizer. The quenching rate constant of DPA by triplet benzophenone was determined to be (3.6±0.3)×10 9  M −1  s −1 with Stern–Volmer plots. The intrinsic energy transfer rate was also estimated by analyzing the time profile of the TRTL signal.

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