TIME-RESOLVED ESR STUDY ON THE PHOTOCHEMICAL PROCESS IN PHENOTHIAZINE/1,4-NAPHTHOQUINONE/ETHYLENE GLYCOL SYSTEM

Chinese Journal of Magnetic Resonance ›› 1998, Vol. 15 ›› Issue (3): 205-209.

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TIME-RESOLVED ESR STUDY ON THE PHOTOCHEMICAL PROCESS IN PHENOTHIAZINE/1,4-NAPHTHOQUINONE/ETHYLENE GLYCOL SYSTEM

Tian Qiu¹, Chen Ciping², He Guanglong¹, Jian Huahua¹, Xu Guangzhi¹

1. Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080;
2. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101

Received:1998-01-09 Revised:1998-03-09 Published:1998-06-05 Online:2018-01-13

Abstract

Abstract: The photoinduced hydrogen transfering reaction in phenothiazine/1,4-naphthoquinone/ethylene glycol system has been investigated by time-resolved electron spin resonance technique. From the measured emission CIDEP signals of neutral 1,4-naphtho semiqinone radical NQH·^*, it is concluded that the rate of hydrogen transfering reaction between ethylene glycol and 1,4-naphthoquinone is much faster than the rate of electron transfering reaction between phenothiazine and 1,4-naphthoquinone. The broadened CIDEP spectra obtained in acidic solution of 1,4-naphthoquinone/ethylene glycol systems indicate that a fast proton exchange process must exist between the spin polarized radicals NQH·^* and NQH·₂⁺^*.

Key words: TRESR, CIDEP, Proton transfer

Tian Qiu, Chen Ciping, He Guanglong, Jian Huahua, Xu Guangzhi. TIME-RESOLVED ESR STUDY ON THE PHOTOCHEMICAL PROCESS IN PHENOTHIAZINE/1,4-NAPHTHOQUINONE/ETHYLENE GLYCOL SYSTEM[J]. Chinese Journal of Magnetic Resonance, 1998, 15(3): 205-209.

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TIME-RESOLVED ESR STUDY ON THE PHOTOCHEMICAL PROCESS IN PHENOTHIAZINE/1,4-NAPHTHOQUINONE/ETHYLENE GLYCOL SYSTEM

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