高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (9): 1245.

• 论文 • 上一篇    下一篇

钇与2-(4'-氯-2'-膦酰基-苯偶氮)-7-(2',6'-二溴-4'-氯-苯偶氮)-1,8-二羟基-3,6-萘二磺酸配位反应驰豫动力学研究

安从俊, 方贤安, 林智信, 曾福生   

  1. 武汉大学化学系, 武汉, 430072
  • 收稿日期:1991-09-16 出版日期:1992-09-24 发布日期:1992-09-24
  • 通讯作者: 安从俊

Studies on Relaxation Kinetics of Coordination Reaction Between Yttrium and 2-(4'-Chloro-2'-phosphono-phenyIazo)-7-(2',6'-dibromo-4'-chloro-phenylazo)-1,8-dihydroxy-3,6-naphthalene Disulfonic Acid

AN Cong-Jun, FANG Xian-An, LIN Zhi-Xin, ZENG Fu-Sheng   

  1. Department of Chemistry, Wuhan University, Wuhan, 430072
  • Received:1991-09-16 Online:1992-09-24 Published:1992-09-24

摘要: 用跳浓驰豫法测定不同温度下的驰豫时间τ.根据拟定的机理导出了1/τ的函数表达式为1/τ=k[H6R]0/[H3+O]-(6k/ε[H3+O]0)A,获得表观速率常数k及摩尔吸光系数ε,表观活化能为52.82KJ/mol,活化焓为50.34kJ/mol,活化熵在278K~298K范围内为负值,配合物稳定常数lgK'.为13.84。与孤立变量法、比尔法、平衡移动法获得的结果吻合.

关键词: 配位反应, 驰豫动力学,

Abstract: In this paper,the relaxation time was determined at different temperatures by the concentration jump relaxation method.The expression of l/t was derived from the assumed mechanism of reaction.The apparent rate constant and molecular absorbance index were obtained by the concentration-jump relaxation method.The arrhemus activation energy is 52.82 kJ/mol and the activation enthalpy is 50.43 kJ/mol.The activation entropy is a negative in the range of 278~K298 K.The stability constant of complex is 13.84.These experimental results are in agreement with those obtained by using other methods.

Key words: Coordination reaction, Relaxation kinetics, Yttrium

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