高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (6): 766.

• 研究论文 • 上一篇    下一篇

用光度法测定物种溶液状态的缔合数和缔合度

何锡文, 史长虹, 张贵珠, 杨万龙, 于贵英   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1992-10-04 修回日期:1993-03-15 出版日期:1993-06-24 发布日期:1993-06-24
  • 通讯作者: 何锡文
  • 基金资助:

    国家自然科学基金

Spectrophotometry for Measuring Association Number and Association Degree in Solution State of the Species

HE Xi-Wen, SHI Chang-Hong, ZHANG Gui-Zhu, YANG Wan-Long, YU Gui-Ying   

  1. Department of Chemistry, Nankai Umiwsity, Tianjin, 300071
  • Received:1992-10-04 Revised:1993-03-15 Online:1993-06-24 Published:1993-06-24

摘要: 以分光光度法研究物种的溶液状态,提出了新的模型测定缔合数和缔合度并使之定量化。经过联吡啶和罗丹明6G体系验证,表明该方法准确可靠。

关键词: 缔合数, 缔合度, 分克克度法, 联吡啶, 罗丹明6G

Abstract: Anew approach for measuring association number (i) and associated degree (a) in species solution is presented.Selection of different values of i will yield curve with differing shape, but only the correct value of i will yield a straight line with slope p and intercept of εM.The value of a can be obtained from spectrophotometric data through the equation.The systems of bipyridine in cyclohexane and rhodamine 6Gin water are used to demonstrate the applicability of the method, it has been applied to the determination of i and α with satisfactory results.This paper describes the effect of rhodamine 6Gmonomer solution on recovering of fluorescence more effectively to the dimer solution.Rhodamine 6Gdimerizes in higher concentration range in aqueous solution and its fluorescence fades remarkably.In the case, the variation of R 6Gfluorescence intensity implies that the process from dimer to monomer is D→2M; Mi→M+(i-1.)Min water medium.

Key words: Association number, Associated degree, Spectrophotometry, Bipyridine, Rhodamine6G

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