【摘要】 苯并咪唑是优良的离子探针活性基团,以3种不同取代基结构的B-降胆甾苯并咪唑化合物作为金属离子受体,采用紫外光谱法和荧光光谱法对12种不同的金属离子(Co²⁺、K⁺、Na⁺、Li⁺、Pb²⁺、Ca²⁺、Zn²⁺、Sr²⁺、Ni²⁺、Ag⁺、Hg²⁺、Cu²⁺)进行检测,结果表明这3种化合物对Cu²⁺离子具有高度的选择性,抗干扰能力好,可作为选择性光学传感器,检出限分别为7. 31×10^-8、7. 99×10^-8、5. 85×10^-8mol/L,采用Job法测试,3种化合物与Cu²⁺的配合比为1∶1。更多还原

【Abstract】 Benzimidazole is an excellent active group of ionic probe.Using three kinds of different groups substituted B-norcholesteryl benzimidazole compounds as metal ion acceptors,the recognition abilities towards various metal ions( Co²⁺,K⁺,Na⁺,Li⁺,Pb²⁺,Ca²⁺,Zn²⁺,Sr²⁺Ni²⁺,Ag⁺,Hg²⁺,Cu²⁺) have been investigated via ultraviolet spectroscopy and fluorescence.The compounds showed high selectivity and good anti-interference ability to Cu²⁺,so may be used as selective optical sensor.The detection limit was down to 7. 31×10^-8 mol/L,7. 99×10^-8 mol/L and 5. 85×10^-8 mol/L,respectively.The stoichiometric ratio of the complex between Cu²⁺and compound were determined as 1 ∶1 by Job method.更多还原