[1]邱凤仙.光谱法研究微乳液对PAPC-Cu(Ⅱ)显色反应的增敏作用及热力学性质[J].东南大学学报(自然科学版),2004,34(4):507-510.[doi:10.3969/j.issn.1001-0505.2004.04.019]
　Qiu Fengxian,Ni Liang.Study on sensitized effects of micro-emulsion on color reaction of 4-(2-pyridylazo)-pyrocatechol with copper(Ⅱ)and thermodynamic properties by means of spectrum[J].Journal of Southeast University (Natural Science Edition),2004,34(4):507-510.[doi:10.3969/j.issn.1001-0505.2004.04.019]
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光谱法研究微乳液对PAPC-Cu(Ⅱ)显色反应的增敏作用及热力学性质()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第4期
页码:
507-510
栏目:
化学化工
出版日期:
2004-07-20

文章信息/Info

Title:
Study on sensitized effects of micro-emulsion on color reaction of 4-(2-pyridylazo)-pyrocatechol with copper(Ⅱ)and thermodynamic properties by means of spectrum
作者:
邱凤仙1;  2;  倪良1
1 江苏大学化学化工学院, 镇江 212013; 2 东南大学化学化工系, 南京 210096
Author(s):
Qiu Fengxian1;  2;  Ni Liang1
1 School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
2 Department of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, China
关键词:
光谱法;  显色剂;  微乳液;  配合反应;  热力学性质
Keywords:
spectrum;  color developing reagent;  micro-emulsion;  coordination reaction;  thermodynamic properties
分类号:
O657.32
DOI:
10.3969/j.issn.1001-0505.2004.04.019
摘要:
测定了不同介质中新显色剂4-(2-吡啶偶氮)-邻苯二酚(PAPC)与 Cu(Ⅱ)体系的吸收光谱,结果发现混合微乳液对显色反应具有显著的增敏作用.配合物的最大吸收波长为504 nm,表观摩尔吸光系数为5.83×104 L/(mol·cm),铜质量浓度在0～1.2 μg/cm3范围内服从朗伯-比耳定律.结合实验数据采用等摩尔连续法和平衡移动法确定了配合物的组成和不同温度下的平衡常数,并由热力学原理得到了配合反应的焓变、熵变和Gibbs自由能变等热力学性质.
Abstract:
Absorption spectrum of systems composed of new color reagent 4-(2-pyridylazo)-pyrocatechol and copper( Ⅱ )were measured in different solutions. The results show that mixing micro-emulsion has apparent sensitization effect on the color reaction. The maximum absorption wavelength of the complex is 504 nm. The apparent molar absorptive index is 5.83×104 L/(mol·cm). Beer’s law is obeyed in the range of 0 to 1. 2 μg/cm3 Cu( Ⅱ ). According to experimental data, the components and the stable constants of coordination compounds at different temperatures are determined by employing the equal molar continuous method and the equilibrium moving method. The enthalpy, entropy and the Gibbs’ free energy of the coordination reaction are obtained based on the relationship between the stable constants and temperatures.

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备注/Memo

备注/Memo:
基金项目: 江苏省教育厅“青蓝工程”基金资助项目、自然科学基金资助项目、江苏大学高级人才基金资助项目(02JDG013).
作者简介: 邱凤仙(1965—),女,博士生,副教授; 倪良(联系人),男,博士,教授,niliang@ujs.edu.cn.
更新日期/Last Update: 2004-07-20