【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。更多还原

【Abstract】 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.更多还原