用于水中Cr_(2)O_(7)^(2-)/Ce^(3+)检测的二维聚合物的合成及性质研究  

Synthesis and Properties of Two-Dimensional Polymers Based on Cr_(2)O_(7)^(2-)/Ce^(3+)Detection in Water

作　　者：孙娜[1,3] 贺柳婷[1] 王晓娟 司秀文 孙亚光 SUN Na;HE Liuting;WANG Xiaojuan;SI Xiuwen;SUN Yaguang(Shenyang University of Chemical Techology,Shenyang 110142,China;Shanxi Institute of Chemical Industry,Taiyuan 030000,China;Nankai University,Tianjin 300711,China)

机构地区：[1]沈阳化工大学理学院,辽宁沈阳110142 [2]山西省化工研究所,山西太原030000 [3]南开大学先进能源材料化学教育部重点实验室,天津300071

出　　处：《沈阳化工大学学报》2023年第4期289-296,355,共9页Journal of Shenyang University of Chemical Technology

基　　金：国家自然科学基金面上项目(21671139);国家自然科学基金青年基金(22301191);一带一路“创新人才交流外国专家项目”(DL2022006007L);辽宁省教育厅科研项目(LJ2019011);辽宁省科技计划联合计划(基金)项目(2023-BSBA-274);博士后基金面上项目(2023M731798)。

摘　　要：水热条件下,N-杂环羧酸配体1,3-双(4-羧基苄基)苯并咪唑鎓氯盐与过渡金属Cd^(2+)合成了新型配位聚合物[Cd(L_(1))(L_(2))·2H_(2)O]n[H_(2)L+1Cl^(-)=1,3-双(4-羧基苄基)苯并咪唑氯鎓氯盐,HL_(2)=3-(4-羧基苄基)苯并咪唑,HL_(2)由H_(2)L+1Cl^(-)原位生成].使用荧光光谱法分析了Cd-CP对水中常见离子的检测能力,结果表明Cd-CP可以特异性识别水中的Cr_(2)O_(7)^(2-)和Ce^(3+),分别显示荧光猝灭和增强,检测限分别为1.198×10^(-4)mol·L^(-1)和3.386×10^(-4)mol·L^(-1),具有灵敏度高、选择性高、检测限低等特点.分析了Cd-CP检测水中Cr_(2)O_(7)^(2-)/Ce^(3+)传感机制.Cd-CP材料将为荧光检测的广泛应用提供一定的帮助.A new coordination polymer,[Cd(L_(1))(L_(2))·2H_(2)O]n,(Cd-CP),was synthesized by N-heterocyclic carboxylic acid ligands 1,3-bis(4-carboxybenzyl)-benzimidazole chloride and transition metal Cd^(2+)ions under solvothermal conditions,(H_(2)L_(1)+Cl^(-)=1,3-bis(4-carboxylbenzyl)-benzimidazolium chloride,HL_(2)=3-(4-carboxyl benzyl)benzimidazole),HL_(2)is generated in situ by H_(2)L_(1)+Cl^(-)).Fluorescence spectroscopy was used to analyze the detection ability of Cd-CP on common ions in water.The results showed that Cd-CP could specifically identify Cr_(2)O_(7)^(2-)and Ce^(3+)in water,showing fluorescence quenching and enhancement.And the Cd-CP revealed high sensitivity,high selectivity,low detection limit(1.198×10^(-4)mol·L^(-1)/3.386×10^(-4)mol·L^(-1))in water.The sensing mechanism of Cr_(2)O_(7)^(2-)/Ce^(3+)in water detected by Cd-CP was analyzed.Cd-CP will offer certain guidance for the widespread application of fluorescence detection.

关 键 词：配位聚合物 晶体材料 发光探针 

分 类 号：O614.24[理学—无机化学]