摘要
设计并合成了一种基于联二萘酚衍生物的荧光传感器1,1在乙腈溶液中对Cu^(2+)具有很好的选择性和灵敏度。当所加金属离子的浓度为1的10倍的时候,只有Cu^(2+)能显著猝灭1的荧光,而其它离子(Hg^(2+),Pb^(2+),Sr^(2+),Ba^(2+),Cd^(2+),Ni^(2+),Co^(2+),Fe^(2+),Mn^(2+),Zn^(2+),Ce^(3+),Mg^(2+),K^+,Fe^(3+),Cr^(3+),Na^+)仅能引起1的荧光发射强度略微下降。结合比实验证明1与Cu^(2+)是以1:2的方式结合,通过Benesi-Hildebrand方程计算得出其表观结合常数为4.09×10^(10)M^(-2)。
A new binol derivative based sensor 1 was designed and synthesized.Sensor 1 exhibits high selectivity and sensitivity to Cu^(2+) in CH_3CN solution.The fluorescence intensity of 1 was greatly quenched when 10 equiv of Cu^(2+) was added into 1 solution,other metal ions such as Hg^(2+),Pb^(2+),Sr^(2+),Ba^(2+),Cd^(2+), Ni^(2+),Co^(2+),Fe^(2+),Mn^(2+),Zn^(2+),Ce^(2+),Mg^(2+),K~+,Fe^(3+),Cr^(3+) and Na~+ only can induce minor fluorescence intensity decrease.The interaction of sensor 1 and Cu^(2+) was proven to adopt a 1:2 binding stoichiometry, and the apparent binding constant is calculated to be 4.09×10^(10)M^(-2).
出处
《渤海大学学报(自然科学版)》
CAS
2011年第1期37-41,共5页
Journal of Bohai University:Natural Science Edition
基金
辽宁省教育厅资助项目(No:2008T002)
关键词
联二萘酚
荧光传感器
荧光识别
binaphthol
fluorescent sensor
fluorescent recognition