影像科学与光化学 ›› 1989, Vol. 7 ›› Issue (1): 37-41.DOI: 10.7517/j.issn.1674-0475.1989.01.37

• 研究论文 • 上一篇    下一篇

外加盐反离子对一种阴离子菁染料的J-聚集效应

周金渭, 杨建武, 申洁如   

  1. 西北大学化学系 西安
  • 收稿日期:1987-08-10 修回日期:1988-08-20 出版日期:1989-02-20 发布日期:1989-02-20
  • 通讯作者: 周金渭

THE EFFECT OF COUNTERIONS ON THE J-AGGREGATION OF AN ANIONIC CYANINE DYE

ZHOU JIN-WEI, YANG JIAN-WU, SHEN JIE-HU   

  1. Deportment of Chemistry, Northwest University, Xian, P. R. China
  • Received:1987-08-10 Revised:1988-08-20 Online:1989-02-20 Published:1989-02-20

摘要: 研究了室温下外加盐反离子对一种阴离子菁染料在稀水溶液的J-聚集体形成的效应。吸收光谱表明反离子未并入平面菁离子自身的堆叠体内,而应是以电性关系“束缚”于其外。电化学法测定染料溶液中反离子活度的结果表明,菁离子堆叠体与“束缚”于其外的简单金属反离子之间接近于以电价关系相维系。吸收光谱还表明,分别加入所选用的几种简单盐反离子时,它们引起在同浓度染料Ⅰ稀溶液中产生J-聚集体的最低浓度主要受反离子电荷的,控制,反离子本性的影响不明显;高价反离子对于引发生J-聚集体特别有效。

关键词: 菁染料, 聚集态, 反离子

Abstract: The effect of counterions on the J-aggregai ion of an anionic cyanine dye, 4, 5, 4', 5'-dibenzo-9-ethyl-3, 3'-bis-(3-sulfopropyl)-thiacarbocyanine (1), in dilute aqueous solutions at room temperature was studied. Absorption spectra indicated that the counterions were not incorporated in the planar dye-ion stacks. Counterion activity measurements for dye I in solutions on adding simple metal ion salts resulted in that the dye-ion stacks with the surrounding counterions bound nearby behaved nearly as a salt-like "totality". The spectra also showed that, for the-added metal ion salts, the minimum Counterion concentrations necessary for initiating J-ag-gregation of dye I in dilute solutions of constant dye concentration depends mainly on the charge of the counterions, being much more efficient for the high velent ones. The effect of the nature-of the counterions was not significant.

Key words: cyanine dye, aggregation, counterion