Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 3249 - 3256 (1988)
Update date:2022-08-04
Topics:
Evans, Jeffrey C.
Rowlands, Christopher C.
Turkson, Lydia A.
Barratt, Martin D.
Aqueous akaline solutions (pH 8) of (I) 2-methyl-4-chlorophenol, (II) 2-cyclohexyl-4-chlorophenol, (III) 2-benzyl-4-chlorophenol, (IV) 2,2'-methylene-bis-(4-chlorophenol), (V) 2-methoxy-4-chlorophenol, have been irradiated in situ with u.v. light and studied by electron spin resonance spectroscopy with a view to investigating further the free radicals formed by photoallergens with this basic chemical structure.Radical species were observed in all cases within minutes of irradiation.The radical spectra were interpreted and assigned as arising from substituted semiquinone radical anions, showing the initial replacement of the 4-chloro group with OH to give the corresponding hydroquinones.In the presence of oxygen, the hydroquinones are oxidised to the corresponding semiquinone radicals.There was no direct evidence of the presence of initial carbon-centred aryl radicals formed by the loss of chlorine; radicals of this type were, however, demonstrated by spin-trapping experiments using 5,5-dimethyl-1-pyrroline N-oxide (DMPO).
View MorePenglai Qianwei Chemical Co., Ltd.
Contact:86-535-3357802
Address:Shahelu (north), Penglai, Shandong, China
Yingkou Sanzheng Organic Chemical Co. Ltd.
Contact:+86-417-3638818
Address:25 Gengxinli Village, Daqing Road, Yingkou, Liaoning, China
Contact:+86-21-38122007
Address:2, Lane 1123, Kangqiao Road, Pudong New Area, Shanghai
Nantong Baokai Chemical Co., Ltd (Hangzhou Baokai Bio-Chemicals Co.,Ltd.)
Contact:+86-513-83886111
Address:No. 68 Suzhou road ,Binjiang Fine Chemical Industrial Park , Beixin town, Qidong city ,Jiangsu province
JiangXi Hong Run Chemical Co., Ltd
Contact:+86-0791-88521351
Address:XingHuo industrial zone in YongXiu county
Doi:10.1039/jr9640001881
(1964)Doi:10.1039/J19690001631
()Doi:10.1021/acscatal.6b01031
(2016)Doi:10.1155/2001/23925
(1948)Doi:10.1039/c39950000019
(1995)Doi:10.1246/bcsj.62.143
(1989)