Photostabilizing effects of singlet oxygen quenchers on long chain cyanine dyes  

作　　者：曾万学 陈萍 郑德水 Tsuneki Okazaki Masaaki Hayami 

机构地区：[1]Institute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101,China [2]Nippon Kankoh-Shikiso Kenkyusho,Okayama 701,Japan

出　　处：《Science China Chemistry》1995年第11期1298-1305,共8页中国科学（化学英文版）

基　　金：the National Natural Science Foundation of China

摘　　要：The total rate constants of the reaction of six antioxidants with singlet oxygen were measured by fluorospectroscopy,and the effects of these antioxidants on the photostability of the dyes were also investigated kinetically.The results reveal that the six antioxidants are the effective quenchers of singlet oxygen (~1O_2)and can increase the photostability of the dyes.The power of metal chelates to quench ~1O_2 is the strongest,and the chelates show the most effects on the photostability of the dyes.The photostability of the dyes has something to do with the relative amount of the antioxidant used.The total rate constants of the reaction of six antioxidants with singlet oxygen were measuredby fluorospectroscopy,and the effects of these antioxidants on the photostability of the dyes were alsoinvestigated kinetically.The results reveal that the six antioxidants are the effective quenchers of singlet oxygen（¹O₂）and can increase the photostability of the dyes.The power of metal chelates to quench ¹O₂ is thestrongest,and the chelates show the most effects on the photostability of the dyes.The photostability of thedyes has something to do with the relative amount of the antioxidant used.

关 键 词：LONG CHAIN cyanine DYE SINGLET oxygen QUENCHER PHOTOOXIDATION 

分 类 号：O621.1[理学—有机化学]