ESR STUDY ON THE FREE RADICALS IN THE PHOTOCHEMICAL REACTION BETWEEN ALKYL DIAMINES AND PIGMENT DISPERSIONS

doi:10.7517/j.issn.1674-0475.1990.03.177

Imaging Science and Photochemistry ›› 1990, Vol. 8 ›› Issue (3): 177-181.DOI: 10.7517/j.issn.1674-0475.1990.03.177

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ESR STUDY ON THE FREE RADICALS IN THE PHOTOCHEMICAL REACTION BETWEEN ALKYL DIAMINES AND PIGMENT DISPERSIONS

CHEN CI-PING¹, REN XIN-MIN¹, ZHANG YONG-KANG², LU DAO-HUI²

1. Institute of Photographic Chemistry, Acadcmia Siniea, Beijing 100101, P. R. China;
2. Institute of Chemistry, Acadcmia Siniea, Beijing 100080 P. R. China

Received:1988-11-03 Revised:1989-06-20 Online:1990-08-20 Published:1990-08-20

Abstract

Abstract: Photoinduced electron transfer reactions between alkyl diamines and ZnO,TiO₂ dispersions in heptane or benzene solution were studied with the combination of ESR spectroscopy and spin trapping technique.The signal of a nitrogen-centered radical adduct of DMPO was observed.The results obtained indicate that the trapped radical is a cation radical of diamine produced from diamine and photogenerated hole.

Key words: alkyl diamines, pigment dispersions, photoreaction, ESR, free radicals

CHEN CI-PING, REN XIN-MIN, ZHANG YONG-KANG, LU DAO-HUI. ESR STUDY ON THE FREE RADICALS IN THE PHOTOCHEMICAL REACTION BETWEEN ALKYL DIAMINES AND PIGMENT DISPERSIONS[J]. Imaging Science and Photochemistry, 1990, 8(3): 177-181.

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ESR STUDY ON THE FREE RADICALS IN THE PHOTOCHEMICAL REACTION BETWEEN ALKYL DIAMINES AND PIGMENT DISPERSIONS

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