Rapid Communication in Photoscience

  • 제1권2호
  • /
  • Pages.35-37
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  • 2012
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  • 2234-8182(pISSN)
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  • 2288-4564(eISSN)
한국광과학회 (Korean Society of Photoscience)
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Ketyl radical formation of excited 1, 8-naphthalimides in protic polar solvent

  • Cho, Dae Won (Konkuk University-Fraunhofer ISE Next Generation Solar Cell Research Center, Konkuk University) ;
  • Cho, Dae Won (Department of Chemistry, Yeungnam University) ;
  • Park, Hea Jung (Department of Chemistry, Pusan National University) ;
  • Yoon, Ung Chan (Department of Chemistry, Pusan National University) ;
  • Lee, Myoung Hee (Konkuk University-Fraunhofer ISE Next Generation Solar Cell Research Center, Konkuk University) ;
  • Im, Chan (Konkuk University-Fraunhofer ISE Next Generation Solar Cell Research Center, Konkuk University)
  • 투고 : 2012.04.03
  • 심사 : 2012.06.27
  • 발행 : 2012.06.01
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초록

Photoinduced electron-transfer process of 1,8-naphthalimide-linker-trimethylsilane (NI-O3-TMS, O3 = 3,6,9-trioxaundecyl) and NI-O3 has been investigated using the transient absorption measurements in $CH_3CN$ and $CH_3CN/H_2O$. The excitation of NI-O3-TMS in $CH_3CN$ produced the NI radical anion ($NI^{{\cdot}-}$) with a transient absorption band around 413 nm, via the intermolecular electron-transfer between NI moieties in the excited singlet state. In contrast, in a protic polar solvent mixture of $CH_3CN/H_2O$, a proton abstraction process occurred from $NI^{{\cdot}-}$ to generate the NI ketyl radical ($NIH^{\cdot}$), which showed a transient absorption band around 405 nm. The decay time constants of $NIH^{\cdot}$ were quite long compared to those of $NI^{{\cdot}-}$ in $CH_3CN$.

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참고문헌

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