影像科学与光化学 ›› 1989, Vol. 7 ›› Issue (4): 25-30.DOI: 10.7517/j.issn.1674-0475.1989.04.25

• 研究论文 • 上一篇    下一篇

光谱增感菁染料自缔合作用的热力学研究——Ⅱ.3,3′-二(γ-磺酸丙基)-9-乙基-4,5,4′,5′-二苯并噻碳菁在DMF-水混合溶剂中J-聚集体生成和J-聚集热

宫永宽, 申洁如, 钟广学, 张祖训   

  1. 西北大学化学系, 西安 710069
  • 收稿日期:1988-04-23 修回日期:1988-11-16 出版日期:1989-11-20 发布日期:1989-11-20
  • 通讯作者: 宫永宽

THERMODYNAMIC PROPERTIES OF SELF-ASSOCIATION OF PHOTOGRAPHIC SPECTRAL SENSITIZING CYANINE DYES Ⅱ. J-AGGREGATE FORMATION OF 3,3’-DI-(r-SULFOPROPYL)-9-ETHYL-4,5,4’,5’-DIBENZOTHIA-CARBOCYANINE IN DMF-H2O MIXED SOLVENTS AND HEAT OF J-AGGREGATION MEA

GONG YONG-KUAN, SHEN JIE-RU, ZHONG GUANG-XUE, ZHANG ZU-XUN   

  1. Chemistry Department, the Northwest University, Xian 710069, P.R. China
  • Received:1988-04-23 Revised:1988-11-16 Online:1989-11-20 Published:1989-11-20

摘要: 由吸收光谱研究了3,3′-二(丁-磺酸丙基)-9-乙基-4,5,4′,5′-二苯并噻碳菁三乙胺盐(Ⅰ)在DMF-水溶液中生成J-聚集体的效应;直接测量了25℃形成J-聚集体过程的热效应,得到了J-聚集体的聚集热△Hs=-(43±1)×103J(表示1摩尔单分子染料连接到J-聚集体上的平均焓变化)。根据Daltrozzo等人将J-聚集体生成当作“结晶”过程的观点,求得该体系中染料I J-聚集体至少包含的染料单分子数n为6。

关键词: 菁染料, 照相光谱增感染料, J聚集体, 聚集热

Abstract: Results were reported for the study of J-aggregation of 3, 3’-di-(r-sulfopropyl)-9-ethyl-4, 5,4’,5’-dibenzothia-carbocyanine triethylamine salt (I) on adding KBr to its solutions in DMF-H2O mixed solvents, where only dimer monomer equilibrium of the dye existed. Heat effects of the mentioned mainly J-aggregate forming processes were measured directly and the J-aggregation enthalpy, △Hs, expressed as the mean aggregation enthalpy per monomer unit (i.e. the-average enthalpy change if one monomer is associated to a growing J-aggregate) was obtained. J-aggregation number was estimated to be 6.

Key words: cyanine, photographic spectral sensitizing dye, J-aggregates, enthalpy of aggregation