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首页> 外文期刊>Applied Magnetic Resonance >FT-EPR study on the sign of exchange interaction in triplet naphthalene-galvinoxyl encounter pair
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FT-EPR study on the sign of exchange interaction in triplet naphthalene-galvinoxyl encounter pair

机译：FT-EPR研究三重萘-丙氧基接触对中交换相互作用的迹象

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Chemically induced dynamic electron polarization (CIDEP) created in the quenching of triplet naphthalene by galvinoxyl were investigated by time-resolved Fourier-transform electron paramagnetic resonance (FT-EPR) measurements with monitoring a free induction decay signal of a pulsed microwave irradiation. Transient FT-EPR spectra of galvinoxyl with CIDEP were observed in various nonpolar solvents with different viscosity. A transient FT-EPR signal phase shows remarkable dependence on the viscosity: FT-EPR signal phases were absorption and emission in the solvents with low and high viscosity, respectively. Time evolutions of the FT-EPR signal of galvinoxyl were well simulated by a model of the radical-triplet pair mechanism (RTPM) for CIDER A sign of the J value in the triplet naphthalene-galvinoxyl system in various solvents were discussed on the basis of the sign rule in the RTPM and the transient FT-EPR signal phase. One of possible explanation for the solvent viscosity dependence of the transient FT-EPR signal phase was presented on the basis of hypothetical model of the J value.
机译：通过时间分辨傅立叶变换电子顺磁共振（FT-EPR）测量，并监测脉冲微波辐射的自由感应衰变信号，研究了在用加尔萘氧基淬灭三重萘时产生的化学诱导动态电子极化（CIDEP）。在具有不同粘度的各种非极性溶剂中观察到了加尔维诺尔与CIDEP的瞬态FT-EPR光谱。瞬态FT-EPR信号相显示出对粘度的显着依赖性：FT-EPR信号相分别在低粘度和高粘度溶剂中吸收和发射。通过CIDER的自由基-三重态对机理（RTPM）模型很好地模拟了加尔维诺尔FT-EPR信号的时间演变。在此基础上，讨论了三元酚-加尔维诺尔体系中各种溶剂中J值的符号。 RTPM和瞬态FT-EPR信号相位中的符号规则。基于J值的假设模型，提出了有关瞬态FT-EPR信号相的溶剂粘度依赖性的一种可能解释。

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