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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Synergy Effects of Electric and Magnetic Fields on Locally Excited-State Fluorescence of Photoinduced Electron Transfer Systems in a Polymer Film
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Synergy Effects of Electric and Magnetic Fields on Locally Excited-State Fluorescence of Photoinduced Electron Transfer Systems in a Polymer Film

机译：电场和磁场对聚合物膜中光诱导电子转移系统的局部激发态荧光的协同效应

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摘要

Photoluminescence of electron donor—acceptor pairs that show photoinduced electron transfer (PIET) hasbeen measured in a polymer film under simultaneous application of electric field and magnetic field.Fluorescence emitted from the locally excited state (LE fluorescence) of 9-methylanthracene (MAnt) andpyrene (Py) is quenched by an electric field in a mixture of 1,3-dicyanobenzene (DCB) with MAnt or Py,indicating that PIET from the excited state of MAnt or Py to DCB is enhanced by an electric field. Simultaneousapplication of electric and magnetic fields enhances the reverse process from the radical-ion pair produced byPIET to the LE fluorescent state of MAnt or Py. As a result, the electric-field-induced quenching of the LEfluorescence is reduced by application of the magnetic fields. Thus, the synergy effect of electric and magneticfields is observed on the LE fluorescence of MAnt or Py. Exciplex fluorescence spectra resulting from PIETcan be obtained by analyzing the field effects on photoluminescence spectra, even when the exciplexfluorescence is too weak to be determined from the steady-state or time-resolved photoluminescence spectraat zero field.
机译：在同时施加电场和磁场的情况下，在聚合物薄膜中测量了电子给体-显示光致电子转移（PIET）的受体对的光致发光。9-甲基蒽（MAnt）和py的局部激发态（LE荧光）发出的荧光（Py）在1,3-二氰基苯（DCB）与MAnt或Py的混合物中被电场淬灭，表明从MAnt或Py的激发态到DCB的PIET被电场增强。电场和磁场的同时应用增强了从PIET产生的自由基离子对到MAnt或Py的LE荧光态的逆过程。结果，通过施加磁场减少了电场诱导的LE荧光的猝灭。因此，在MAnt或Py的LE荧光上观察到电场和磁场的协同作用。即使当激基荧光太弱而无法从零场的稳态或时间分辨光致发光光谱确定时，也可以通过分析场对光致发光光谱的影响来获得PIET产生的激基荧光光谱。

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