影像科学与光化学 ›› 1989, Vol. 7 ›› Issue (3): 40-45.DOI: 10.7517/j.issn.1674-0475.1989.03.40

• 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——Ⅰ. 3,3′-二(γ-磺酸丙基)-9-乙基-4,5,4′,5′-二苯并噻碳菁在DMF-水混合溶剂中的二聚作用和二聚热

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:1989-08-20 发布日期:1989-08-20

THERMODYNAMIC PROPERTIES OF SELF-ASSOCIATION OF PHOTOGRAPHIC SPECTRAL SENSITIZING CYANINE DYES 1. DIMERIZATION OF 3,3’-DI-(r-SULFOPROPYL)-9-ETHYL-4,5,4’5’- DIBENZOTHIA-CARBOCYANINE DYE IN DMF-WATERMIXED SOLVENTS AND HEAT OF DIMERIZATIONMEAS

GONG YONG-KUAN, SHEN JIE-RU, ZHONO 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:1989-08-20 Published:1989-08-20

摘要: 本文用吸收光谱研究了3,3′-二(γ-磺酸丙基)-9-乙基-4,5,4′,5′-二苯并噻碳菁三乙胺盐(Ⅰ)在DMF-水混合溶剂中存在的状态,求得室温下该染料只存在二聚平衡的浓度范围。用本实验室研制的半导体精密量热系统,测量了25℃染料溶液的稀释热。在含45% DMF的水中,生成1摩尔二聚体的△H298、△G298及△S298分别为-(49.6±1.3)×103J、-(13.1±0.1)×103J和-(122.7±3.2)J·K-1;在含35% DMF的水中分别为-(36.0±1.0)×103J、-(19.1±0.1)×103J和-(54.0±1.5)J·K-1

关键词: 菁, 照相光谱增感染料, 自缔合作用, 二聚热

Abstract: The absorption spectra of 3, 3’-di-(γ-sulfopropyl) -9-ethyl-4,5,4’,5’-dibenzothia-carbocyani ne triethylamine salt (I) in DMF-H2O mixed solvvents of various compositions showed dimer-mo-nomer equilibrium at room temperature within a certain concentration range. For these solutions, the dilution heat effects were measured with the home-made Versatile Precision Semiconductor Calorimetric System made in this laboratory. Dimerization enthalpy △H, △G and △S, which for 1 mole dimer formation at 25℃ in solvents of 45% and 35% DMF (by volume), were found to be: -(49.6±1.3), -(36.0±1.0)kJ;- (13.1±0.1),-(19.9±0.1) kJ and -(122.7±3.2),-(54.0±1.5)J·K-1 respectively.

Key words: cyanine, photographic spectral sensitizing dye, enthalpy of dimerization, self association