【摘要】 以杜醌为光敏剂 ,用高时间分辨电子自旋共振 (TRESR)波谱仪研究了杜醌 /乙二醇体系、杜醌 /氮氧自由基 /乙二醇体系的化学诱导动态电子自旋极化 (CIDEP)。实验表明 ,紫外激光照射下 ,在杜醌 /乙二醇溶液中得到以三重态机理极化为主的中性杜半醌自由基DQH·和以碳为中心的乙二醇碳自由基R·(OH) 2 的极化信号 ,而加入氮氧自由基TEMPO后 ,则只观测到极化的TEMPO的E +E/A极化谱 ,其产生机理属于以四重态为先驱的自由基 -三重态对极化机理 (QP RTPM ) ,结合极化强度的理论计算对该体系的极化形成过程进行了分析更多还原

【Abstract】 The CIDEP spectra of duroquinone/ethylene glycol system and duroquinone/TEMPO/ethylene glycol system have been investigated experimentally with the highly time-resolved ESR spectrometer. The emission lines from DQH^· and R^·（OH）₂ were obtained in duroquinone/ethylene glycol solution originated from TM. After adding TEMPO into DQ/ethylene glycol solution, three emissive E+E/A pattern CIDEP of polarized TEMPO were obtained. Based on the theoretical calculation of CIDEP intensity, the polarization mechanism of TEMPO in duroquinone/TEMPO/ethylene glycol system is quartet precursor RTPM（QP-RTPM）.更多还原