利用1,1,2-三甲基-1H-苯并[e]吲哚、碘乙烷和方酸合成一种非对称吲哚类方酸菁染料(HBIO),可有效识别去离子水中的Cu2+,并且不容易受到其他金属阳离子(Ba2+、Ca2+、Cd2+、Na+、Cr3+、Zn2+、Co2+、K+、Ag+、Pb2+、Ni2+、Al3+、Hg2+、Mg2+和Cu2+)的干扰。HBIO的荧光强度与Cu2+的浓度在一定范围内可以呈现出良好的线性关系,其相关系数(R2)为0.9961,HBIO与Cu2+的结合常数(Ka)约为7.961×109(L/mol)2。此外,通过分析Job's Plot图和红外光谱图,推测出HBIO与Cu2+的络合比为2∶1。
Synthesis of an asymmetric indole squarylium dye (HBIO) using 1,1,2-trimethyl-1H-benzo[e]indole,iodoethane and squaricacid,which can effectively recognize Cu2+ in deionized water,and it was not easily interfered by other metal cations (Ba2+,Ca2+,Cd2+,Na+,Cr3+,Zn2+,Co2+,K+,Ag+,Pb2+,Ni2+,Al3+,Hg2+,Mg2+ and Cu2+).A good linear relationship was observed between the fluorescence intensity of HBIO and the concentration of Cu2+ in a certain range.The correlation coefficient R2 was 0.9961,the binding constant (Ka) of HBIO and Cu2+ was about 7.961×109(L/mol)2.In addition,it was speculated that the complex ratio of HBIO-Cu2+ was 2∶1 which by analyzing the Job's Plot and FT-IR.
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基金资助
国家自然科学基金(21876015)
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