J-聚集态染料超增感作用隔离机理  

Isolation Mechanism of Supersensitization of Cyanine Dyes J－ Aggregates

作　　者：勃.依.沙比罗 石钟豪 

机构地区：[1]莫斯科照相化学研究设计院科研中心 [2]中国乐凯胶片公司,保定071054

出　　处：《信息记录材料》2001年第1期1-7,共7页Information Recording Materials

摘　　要：根据“隔离”机理，超增感作用是由于 J－聚集态染料与化学增感产物之间的空间分离而减少电子与空穴的复合。“隔离”是基于有机物在 (Ag,Au)S中心上的独特吸附。这种独特吸附取决于超增感剂 1， 3偶极矩上的电荷距离是否与 (Ag,Au)S斑中 Ag＋ (Au＋ )和 S－ 2离子之间的距离相符合。“隔离”机理不同于熟知的 Gilman“还原”机理，根据本机理可通过不同结构有机物的组合应用使超增感作用获得超加和效应。An isolation mechanism of supersensitization of cyanine dyes J－ aggregates is considered.It consists of decrease of electron－ hole recombination due to space separation of the J－ aggregates and the products of chemical sensitization .It is concluded that the basis for the isolation mechanism of supersensitization is a specific adsorption of organic compounds on (Ag， Au)S－ centers.This adsorption is determined by conformity of distance between charges in 1， 3－ dipoles of supersensitizer to distance between Ag＋ (Au＋ )and S2－ ions in (Ag， Au)S cluster.The fundamental differences of the isolation mechanism from well known Gilman′ s reduction mechanism allows to realize superadditive supersensitization effect by the use of compositions of organic substances with a various structures.

关 键 词：菁染料 超增感 隔离机理 J-聚集态染料 

分 类 号：TQ613.5[化学工程—精细化工]