摘要
合成了含有丹磺酰胺荧光团的新型Zn2+荧光探针DH1(5-(二甲基氨基)-N-(4-(2-(2-羟基亚苄基)甲酰肼基)苯基)萘-1-磺酰胺),利用光谱法研究它对锌离子的识别作用。光谱滴定和ESI-MS谱分析表明DH1与Zn2+以1∶1的化学计量数配位。在CH3CN/H2O(φ,9∶1)体系中,DH1与Zn2+结合后荧光显著增强,量子产率高达0.53,荧光检测限达到1.0×10-7 mol.L-1,而其他常见金属离子,如K+,Li+,Na+,Mg2+,Ca2+,Cr3+,Mn2+,Ni 2+,Pb2+,Cu2+,Cd2+,Co2+,Fe2+及Hg2+不引起荧光光谱变化。结果表明,DH1对锌离子识别具有较高的选择性和灵敏度。
A novel dansyl sulfonamide-based fluorescence probe DH1 [（E）-5-（dimethylamino）-N-（4-（2-（quinolin-2-ylmethylene） hydrazineearbonyl）phenyl）aphthalene-l-sulfonamide] was synthesized for detection of Zn^2＋. Spectral properties of DH1 such as UV-Vis, fluorescence spectra and ESI-MS for recognition of Zn^2＋ were studied. Spectrophotometric titration and ESI-MS spectra indicate the formation of a 1 ： 1 complex of Zn^2＋ with DH1. The results show that DH1 has high quantum yield of 0. 53 and low the detection limit of 1.0×10-7 mol · L 1 for detection of Zn^2＋ in acetonitrile/water（9 ： 1, volume ratio）. Moreover, no fluorescence intensity changes were observed in the presence of other common metal ions such as K^＋ , Li^＋ , Na^＋ , Mg^2＋ , Ca^2＋ , Cr^3＋, Mn^2＋ , Ni^2＋ , Pb^2＋ , Cu^2＋ , Cd^2＋ , Co^2＋ , Fe^2＋ and Hg^2＋ , indicating that DH1 has excellent selectivity and high sensitivity for detection of Zn^2＋.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第10期2722-2725,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(20801008)
辽宁省教育厅科学研究一般项目(L2011105)
辽宁工业大学教师科研启动基金项目(X201116)资助
关键词
锌离子
荧光探针
丹磺酰胺
识别
Zinc ion
Fluorescence probe
Dansyl sulfonamide
Recognition
