基于“Off-On”罗丹明染料高选择性Cu^(2+)荧光探针的合成  

Synthesis of a highly selective "off-on" chemodosimeter for Cu^(2+) based on rhodamine dyes

作　　者：于璐[1] 张丽珠[1] 樊保敏[1] 吴红梅[1] 

机构地区：[1]云南民族大学民族资源化学国家民委-教育部重点实验室,云南昆明650500

出　　处：《云南民族大学学报（自然科学版）》2013年第4期253-256,共4页Journal of Yunnan Minzu University:Natural Sciences Edition

基　　金：国家自然科学基金(21162040;20902080);云南省应用基础研究面上项目(2012FB170)

摘　　要：以罗丹明B为原料,设计合成了一个Cu2+荧光探针R1.通过其光谱性能和离子选择性测试结果表明,R1在V(乙醇)∶V(水)=10∶90的介质中能高选择性识别Cu2+.其最大发射波长为582 nm,而其它常见离子如Na+,K+,Mg2+,Ca2+,Mn2+,Cd2+,Cr3+,Co2+,Ni2+,Ag+,Pb2+,Zn2+,Fe3+和Hg2+则几乎不引起探针的荧光光谱变化.在1×10-5mol/L范围内Cu2+的荧光滴定结果表明,探针的检测限为8×10-6mol/L.表明R1对Cu2+的识别具有很高的灵敏度.此外,R1是一个对pH不敏感的分子探针,通过拟合计算出探针R1的pKa为4.2.表明探针可以在pH 4.5～10的范围内对Cu2+进行有效地检测.A Cu^2＋ fluorescence chemodosimeter R1 was synthesized based on rhodamine B. It Was found that the fluorescence intensity of R1 increased wltla tlae aoaluon of Cu^2＋ inethanol/water （ 10：90, V/V） solution. The maximum emission wavelength of R1 was 582 nm. With the addition of Cu^2＋ , R1 showed an apparent fluorescent enhancement. Different from Cu^2＋ other metal ions such as Cr^3＋,Fe^3＋ ,Fe^2＋, Hg^2＋, Mn^2＋, Co^2＋,Pb^2＋,Mg2＋, Ca^2＋, Cd^2＋, Zn^2＋, Ba^2＋, K^＋ and Ni^2 ＋ did not induce any spectral response under identical conditions.The sensor was useful for measuring Cu^2＋ at the concentrations ranging from 1 × 10^-6 moL/L with a detection limit of 8 × 10^-6mol/L. The compound R1 was a pH insensitive probe and its pKa was 4. 2, which could detect Cu^2＋ effec-tively in a relatively wide pH range（ 4. 5 - 10）.

关 键 词：CU2+ 荧光探针 罗丹明染料 选择性 

分 类 号：TQ613[化学工程—精细化工]