文章基本信息

标题：Kinetics of J-Aggregation by Salting Out of 1, 1'-Diethy1-2, 2'-Cyanine Chloride from Dilute Aqueous Solutions
本地全文：下载
作者：Toshio TANAKA ; Hiroshi SAIJO ; Masashi IWASAKI 等
期刊名称：日本写真学会誌
印刷版ISSN：0369-5662
电子版ISSN：1884-5932
出版年度：1987
卷号：50
期号：1
页码：22-26
出版社：The Society of Photographic Science and Technolgy of Japan
摘要：Kinetics of J-aggregation by salting out of 1, 1'-diethyl-2, 2'-cyanine chloride (Dye 1) from dilute aqueous solutions have been studied by mixing Dye 1 solutions with concentrated sodium sulfate solutions in a rapid solution mixing device and measuring the optical absorbance of the mixture at J-band maximum as a function of time with a conventional ultraviolet spectrophotometer. The aggregation rate was larger at lower temperatures, suggesting that nucleation was the rate-determining step of J-aggregation. From the concentration-dependence of the rate, the reaction order of nucleation of J-aggregates was calculated to be about 5, using an n-th order rate equation modified to apply to nucleation systems with low supersaturations. The temperature-dependence of residual monomer concentration at the end of the reaction gave a mean enthalpy of 42 kJ/mol for the dissolution of monomers from J-aggregates.