β-环糊精与中性红-铜(Ⅱ)配合物的相互作用
Interaction Between β-cyclodextrin and Nature Red-Cu (Ⅱ) Complexes
作者：王兴明(西南科技大学 化学系,四川 绵阳 621010)；刘海萍(西南科技大学 化学系,四川 绵阳 621010)；石荣铭(西南科技大学 化学系,四川 绵阳 621010)
Author：(Dept. of Chem.，Southwest Univ. of Sci. and Technol.， Mianyang 621010, China)；(Dept. of Chem.，Southwest Univ. of Sci. and Technol.， Mianyang 621010, China)；(Dept. of Chem.，Southwest Univ. of Sci. and Technol.， Mianyang 621010, China)
收稿日期：2005-08-22 年卷（期）页码：2006,38(3):70-75
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：双波长法;β-环糊精;中性红-铜(Ⅱ)-β-环糊精包合缔合物
Key words：dual wavelength method;β-cyclodextrin;NR-Cu(Ⅱ)-β-CD association compound
基金项目：国家自然科学基金资助项目(40072020）;四川省教育厅自然科学基金重点资助项目(2000-A56)
中文摘要
采用UV-Vis光谱法研究了在pH=7.00的缓冲溶液中中性红(NR)-铜(Ⅱ)配合物与β-环糊精(β-CD)的结合作用。NR形成金属配合物NR-Cu(Ⅱ)后，结合β-CD的数目大大增加，体现了金属配合物与β-CD作用的特殊性。NR-Cu(Ⅱ)金属配合物与β-CD作用迅速，作用体系稳定，并建立了以NR-Cu(Ⅱ)配合物测定β-CD的分光光度法。NR-Cu(Ⅱ)-β-CD包合缔合物的结合比为nNR∶nCu(Ⅱ)∶nβ-CD=1∶2∶35，表观摩尔吸光系数ε=1.74×104L·mol-1·cm－1，NR-β-CD配合物与β-CD作用的表观结合常数K=1.97×10119。β-CD的浓度在0～199.5mg·L－1范围内遵守比耳定律(R=0.9956)，桑德尔灵敏度为0.066μg·cm－2，样品加标回收率为99.3%～100.8%，相对标准偏差为1.40%～2.26%。
英文摘要
The interaction of Nature Red(NR)-Cu(Ⅱ) with β-cyclodextrin(β-CD) was studied by UV-Vis spectrophotometric method in buffer solution(pH=7.00).The formation of complexes NR-Cu(Ⅱ) far and away increases the count of incorporate β-CD. This is the peculiarity of interaction between β-CD with NR-Cu (Ⅱ) complexes. Interaction between β-CD with NR-Cu (Ⅱ) is expeditious. Impact system is equable. Mcasurement methodology of β-CD is established. The apparent molar absorptivity of ε＝1.74×104L·mol－1·cm－1; Conditional constants were defined, nNR∶n Cu (Ⅱ)∶nβ-CD=1∶2∶35; Condition combine constant of NR-Cu (Ⅱ) andβ-CD K=1.97×10119; Beer's law was obeyed in the range of 0～199.5mg·L－1 and the sandell sensitivity is 0.066μg·cm－2 for the determination of β-CD(R=0.9956); The recovery of the method for the determination and the relative standard deviation of β-CD were 99.3%～100.8% and 1.40%～2.26%.
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