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题名: Measurement and characterization of singlet oxygen production in copper ion-catalyzed aerobic oxidation of ascorbic acid
作者: Song, Bo;  Wang, Guilan;  Yuan, Jingli
关键词: ascorbic acid ;  aerobic oxidation ;  europium ;  singlet oxygen production ;  time-resolved luminescence
刊名: TALANTA
发表日期: 2007-04-15
DOI: 10.1016/j.talanta.2006.10.021
卷: 72, 期:1, 页:231-236
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: Production of singlet molecular oxygen (O-1(2)) in the aerobic oxidation of ascorbic acid catalyzed by copper ion was measured and characterized using [4'-(9-anthryl)-2,2':6',2"-terpyridine-6,6"-diyl]bis(methylenenitrilo)tetrakis(acetate)-Eu3+ (ATTA-Eu3+) as a highly sensitive and selective time-resolved luminescence probe for O-1(2). The O-1(2) produced in the reaction was further characterized and confirmed by (i) chemical trapping Of O-1(2) with 9,10-diphenylanthracene (DPA), the corresponding endoperoxide was detected by HPLC and (ii) spin trapping of O-1(2) with 2,2,6,6-tetramethyl-4-piperidinol (TMP-OH), the corresponding free radical of TMP-OH oxide (TMPO center dot) was detected by electron spin resonance (ESR) spectroscopy. The effects of deuterium oxide, sodium azide and histidine on the O-1(2) signal were investigated. The mechanism investigation Of 102 production implied that the ascorbic acid-Cu(I) complex formed in the reaction could be an important intermediate for the O-1(2) production. The reaction of ascorbic acid with copper ion monitored by H-1 NMR and absorption spectroscopy demonstrated the formation of a copper ion-ascorbic acid complex. Except for Cu2+ and Cu+-ascorbic acid systems, no detectable 102 was produced in other transition metal cation-ascorbic acid systems in the studied range. (C) 2006 Elsevier B.V. All rights reserved.
关键词[WOS]: TIME-RESOLVED FLUOROIMMUNOASSAY ;  HUMAN-BLOOD-PLASMA ;  MOLECULAR-OXYGEN ;  VITAMIN-C ;  GENE-EXPRESSION ;  DNA ;  PHOTOACTIVATION ;  ANTIOXIDANT ;  SUPEROXIDE ;  ACTIVATION
语种: 英语
WOS记录号: WOS:000246225900032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140696
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dept Analyt Chem, Dalian 116023, Liaoning Prov, Peoples R China
2.Dalian Univ Technol, Dept Chem, State Key Lab Fine Chem, Dalian 116012, Peoples R China

Recommended Citation:
Song, Bo,Wang, Guilan,Yuan, Jingli. Measurement and characterization of singlet oxygen production in copper ion-catalyzed aerobic oxidation of ascorbic acid[J]. TALANTA,2007,72(1):231-236.
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