Synthesis and photooxidation of sodium 1,3-cyclohexadiene-1,4-diethanoate: A new colorless and water-soluble trap of singlet oxygen.

被引:31
作者
Nardello, V [1 ]
Azaroual, N [1 ]
Cervoise, I [1 ]
Vermeersch, G [1 ]
Aubry, JM [1 ]
机构
[1] FAC PHARM LILLE,URA CNRS 351,EQUIPE RECH RADICAUX LIBRES & OXYGENE SINGULET,F-59006 LILLE,FRANCE
关键词
D O I
10.1016/0040-4020(95)01004-1
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The sodium 1,3-cyclohexadiene-1,4-diethanoate has been designed as a new colorless trap for the measurement of photogenerated singlet oxygen in aqueous solution. Kinetic studies carried out by flash and steady-state photolysis have shown that this compound interacts with singlet oxygen via a pure chemical quenching with a rate constant k(r) equal to (2.6 x 10(7) +/- 0.3) M(-1).s(-1). The two products obtained by photooxidation have been identified. The major one (88%) is a stable endoperoxide whereas the minor one (12%) is an hydroperoxide which decomposes into a phenolic derivative by prolongated warming at 37 degrees C.
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收藏
页码:2031 / 2046
页数:16
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