一种席夫碱化合物的合成及其对Sb3+的识别研究

Synthesis of a Novel Schiff Base Deviratives and Its Recognition of Sb3+

过量存在的Sb3＋对生物具有致毒性和致癌性,迄今有关其检测探针的报道非常少。介绍了一种席夫碱化合物（E）-N-（（E）-3-（4-二甲基氨基苯基）烯丙基）-1,2-苯二胺的合成及其作为Sb3＋比色探针的应用研究。该化合物与Sb3＋结合后产生生色传感效应,席夫碱溶液由淡黄色迅速变成玫红色,最大吸收波长从398 nm红移至507 nm。而其他常见金属离子的加入则基本不引起变化。在一定浓度范围内,席夫碱溶液在507 nm的吸光度与加入的Sb3＋浓度呈良好的线性关系,其最低检测限为2.5×10^（-7）mol/L。配位比分析显示,探针与Sb3＋形成了1∶1型的配合物。该席夫碱化合物对Sb3＋的识别结合具有较好的选择性和灵敏度,可实现定量检测和比色检测。

Overexposure to Sb3＋ could cause toxicities and carcinogenesis.However,chemical sensors used for Sb3＋ detection are rarely developed up to now.In this work,a novel Schiff base compound（E）-N-（（E）-3-（4-（dimethylamino） phenyl） allylidene）benzene-1,2-diamine is synthesized and evaluated as a colorimetric Sb3＋ probe.Probe exhibits a good selectivity and sensitivity towards Sb3＋ in aqueous solution.Addition of Sb3＋ to a solution results in a rapid color change from light yellow to rose red,which corresponds to a large red shift of the maximum absorption peak from 398 nm to 507 nm.Meanwhile,addition of other common metal irons induce no or minimal spectral changes.The absorbance at 507 nm is linearly related to the Sb3＋ concentrations and the detection limit for Sb3＋is 2.5×10^（-7） mol/L.Job＇s plot and Benesi—Hildebrand＇ s plot confirmed that the stoichiometry ratio of probe with Sb3＋ is 1∶1.The Schiff-base compound has a high selectivity and sensitivity towards Sb3＋,and could be used for quantitative and colorimetric detection.