ESR Studies for the Photoinduced Electron Transfer of the Phthalocyanine-Paraquat Systems

doi:10.3866/PKU.WHXB19950408

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	ESR Studies for the Photoinduced Electron Transfer of the Phthalocyanine-Paraquat Systems
	Chen Dewen; Wang Hai; Zhou Jianwei; Yang Yukun; Xu Guangzhi
刊名	ACTA PHYSICO-CHIMICA SINICA
	1995
卷号	11 期号:4 页码:325-330
关键词	Phthalocyanine Paraquat Electron Transfer Esr
ISSN号	1000-6818
DOI	10.3866/PKU.WHXB19950408
英文摘要	Photoinduced electron transfer of metal-phthalocyanine MPc (M=Zn, Mg, Fe, Co, Cu) dispersions in the presence of electron acceptors such as paraquat (4,4'-[-1,4-phenylene]-Bis-[-N-alkyl(oraryl)-2,6-diphenyl-]-pyridinium perchlorates, i.e. PQ(2+)) has been studied by means of ESR spectroscopy. The results show that, when irradiated with visible light, electron in valence band (VB) of photoconductor can be excited to conduction band (CB) to form an electron-hole pair and the electron may transfer from CB to PQ(2+) to produce a radical cation PQ(center dot)(+), then a weak ESR signal was observed. As in the TEA or EDTA, the strength of ESR signal can be enhanced by 5-6 times as much or more. While in the presence of oxygen in the system, the signal of PQ(center dot)(+) radical disappeared and superoxide radical anion O-center dot(-), was detected. It is obvious that the existence of oxygen might seriously hinder the process of photoinduced electron transfer.
语种	英语
出版者	PEKING UNIV PRESS
WOS记录号	WOS:000207590300008
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/55015]
专题	中国科学院化学研究所
通讯作者	Chen Dewen
作者单位	Acad Sinica, Inst Chem, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Chen Dewen,Wang Hai,Zhou Jianwei,et al. ESR Studies for the Photoinduced Electron Transfer of the Phthalocyanine-Paraquat Systems[J]. ACTA PHYSICO-CHIMICA SINICA,1995,11(4):325-330.
APA	Chen Dewen,Wang Hai,Zhou Jianwei,Yang Yukun,&Xu Guangzhi.(1995).ESR Studies for the Photoinduced Electron Transfer of the Phthalocyanine-Paraquat Systems.ACTA PHYSICO-CHIMICA SINICA,11(4),325-330.
MLA	Chen Dewen,et al."ESR Studies for the Photoinduced Electron Transfer of the Phthalocyanine-Paraquat Systems".ACTA PHYSICO-CHIMICA SINICA 11.4(1995):325-330.