π-延展的罗丹明酰肼类Hg^(2+)探针的合成及光谱性质  

Synthesis and spectral properties ofπ-extended rhodamine hydrazide probe for the detection of Hg^(2+)

作　　者：裴畅 杨杨[1] 叶近婷 刘景林[1,2] PEI Chang;YANG Yang;YE Jinting;LIU Jinglin(College of Chemistry and Materials Science,Inner Mongolia Minzu University,Tongliao 028000,China;Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis,Inner Mongolia Minzu University,Tongliao 028000,China)

机构地区：[1]内蒙古民族大学化学与材料学院,通辽028000 [2]内蒙古自治区天然产物化学及功能分子合成重点实验室,通辽028000

出　　处：《分析试验室》2022年第9期1011-1015,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(22061033);内蒙古自治区自然科学基金面上项目(2019MS02004);内蒙古自治区高等学校科学研究项目(NJZZ19146);内蒙古民族大学博士科研启动项目(BS566)资助。

摘　　要：将2-(4-二乙氨基)-2-羟基苯甲酰)苯甲酸与间苯二酚在HSO溶液中反应,合成了π-延展的罗丹明类衍生物氨基苯并吡喃氧杂蒽(ABPX),该衍生物与水合肼反应得到探针分子ABPX-hy,并通过质谱、红外光谱、核磁共振波谱等对其结构进行了表征。该探针在乙醇溶液中加入Hg^(2+)后,UV-Vis吸收光谱在500~600 nm明显增强,溶液颜色由无色变成粉色并逐渐加深,能够实现对Hg^(2+)的可视化检测。在10种常见金属离子共存溶液中,在533 nm处对Hg^(2+)的识别表现出较好的抗干扰性能。探针吸收强度与Hg^(2+)的加入量呈良好的指数关系。ABPX-hy的N,O结合位点与Hg^(2+)的连续配位,形成了化学计量比为2∶1的金属-探针络合物。密度泛函理论(DFT)计算研究了络合前后的轨道能量变化和空间变化。Theπ-extended rhodamine derivative aminobenzopyranoxanthene(ABPX)was synthesized by condensation of 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid with resorcinol in HSOsolution,then the derivative reacted with hydrazine monohydrate to obtain ABPX-hydrazide(ABPX-hy),and its structure was characterized by ESI-MS,FT-IR and NMR spectroscopy.The UV-Vis adsorption spectra at 500-600 nm tended to increase in the presence of Hg^(2+)in ABPX-hy ethanol solution,and the color of the solution changed from colorless to pink and gradually deepened,enabling visual colorimetric detection of Hg^(2+)by naked eye.Under the coexistence of 10 common metal ions,the recognition of Hg^(2+)at 533 nm showed good anti-interference sensing performance.The absorption intensity of ABPX-hy had a good exponential relationship with the addition of Hg^(2+).The continuous coordination of Hg^(2+)to the N and O binding sites of ABPX-hy formed 2∶1 stoichiometry of the ABPX-hy-Hg^(2+)complex.The orbital energy and spatial distribution levels of the closed-cycle to the open-cycle form were obtained by density functional theory(DFT)calculation.

关 键 词：π-延展的罗丹明 酰肼类探针 汞离子 吸收光谱 

分 类 号：O657.3[理学—分析化学]