一种简单的化学传感体系对草酸根的比色识别

摘要

制备了一种基于2,7-萘二酚衍生物的双核锌配合物Zn2L,在水溶液中(HEPES 0．01 mol·dm-3,pH=7．4)Zn2L与指示剂邻苯二酚紫(PV)构筑成一种比色化学传感体系(CE)。该化学传感体系对草酸根具有良好的选择性识别作用,向CE溶液中加入草酸根引起溶液颜色由蓝色变为黄色。除丙二酸根对草酸根的识别具有轻微干扰外,其他二元酸离子包括邻苯二甲酸根,间苯二甲酸根,对苯二甲酸根,丁二酸根,戊二酸根,己二酸根对草酸根的识别无明显干扰。%A new 2,7-naphtalenediol-based dinuclear zinc complex Zn2 L was prepared,which was used to construct a colorimetric chemosensing ensemble(CE)with pyrocatechol violet(PV)as indicator in water solution(HEPES 0. 01 mol·dm-3,pH=7. 4). The obtained chemosensing ensemble displays highly selective recognition to oxalate. Addition of oxalate to CE solution induced a notice-able color change from blue to yellow. Except malonate behaves a slight interference,other dicarboxylates such as phthalate,isoph-thalate,terephthalate,succinate,glutarate,adipate do not produce significant influence on oxalate recognition process.