感绿菁染料J-聚集体吸附在氯化银微晶表面的吸收光谱  

The Absorption Spectrum of Green-Sensitive Cyanine Dyes J-Aggregate Adsorbed on Silver Chloride Microcrystals

作　　者：张继县[1] 李晓苇[1] 张荣香[1] 赖伟东[1] 赵晓辉[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《光谱学与光谱分析》2006年第10期1965-1967,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10274017);河北省自然科学基金项目(103097);河北大学科学基金项目(2003Q02)资助

摘　　要：染料J-聚集体对于现代彩色信息记录与存储材料、生物光电子器件、光合作用、太阳能转换与存储等方面具有十分重要的应用前景和理论意义。感绿菁染料在适当浓度时,对立方体氯化银微晶有增感效应,文章应用吸收光谱法对增感后的氯化银微晶样品进行了研究。研究表明,增感染料浓度低于0.02 mL(染料浓度为5.0 mg.mL-1)/40 g乳剂时,感绿菁染料在立方体氯化银表面不形成J-聚集体,吸收光谱没有J-聚集体吸收峰出现;当染料浓度高于0.2 mL(染料浓度为5.0 mg.mL-1)/40 g乳剂时,染料开始在立方体氯化银微晶表面聚集并形成J-聚集体,吸收光谱有J-聚集体吸收峰出现。随染料浓度进一步增加,J-聚集体的吸收明显加强,吸收峰有微小的红移。The silver chloride microcrystals emulsion which are sensitized by the adsorbed green-sensitive cyanine dye of different concentration, was studied by using the absorption spectrum. The experiments show that when the sensitizing concentration is less than 0. 02 mL（5.0 mg·mL^-1 ）/40 g emulsion, the dye J-aggregate is not formed on the surface of silver chloride microcrystals; when the dye concentration is more than 0.2 mL（5.0mg·mL^-1/40 g emulsion, the dye J-aggregate is formed on the surface of silver chloride microcrystals; compare to the M-state of dye, the maximal absorption peak of J-aggregate shifted to a longer wavelength by about 50 nm. It was found, when the J-aggregate is formed, the absorption in the wavelength range of more than 450 nm is increased.

关 键 词：感绿菁染料J-聚集体 吸收光谱 增感浓度 

分 类 号：TQ571.4[化学工程—精细化工]