Zn(Ⅱ)-MOF电化学传感器在硝基苯甲醛同分异构体识别中的应用  

Application of Zn(Ⅱ)-MOF Electrochemical Sensor in the Recognition of Nitrobenzaldehyde Isomers

作　　者：吴晓琴 胡莹颖[1] 冯佩琦 左莹 魏学红 WU Xiaoqin;HU Yingying;FENG Peiqi;ZUO Ying;WEI Xuehong(Scientific Instrument Center,Shanxi University,Taiyuan 030006,China;Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin 300071,China)

机构地区：[1]山西大学大型科学仪器中心,山西太原030006 [2]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：《山西大学学报（自然科学版）》2021年第3期551-561,共11页Journal of Shanxi University(Natural Science Edition)

摘　　要：合成"剪刀"模式一维双链结构的Zn(Ⅱ)金属有机骨架(Zn-MOFs){[Zn(HL2-)(bipy)(H2O)]·2DMA}n(Zn-1,H3L=均苯三酸,bipy-2,2’-二联吡啶)。Zn-1具有良好的溶液稳定性和电化学活性,将其作为电极基底材料,修饰在金电极(AuE)上,制备Zn-1/AuE电化学传感器,用于在水体系中识别硝基苯甲醛的三种同分异构体:2-硝基苯甲醛(2-NBA)、3-硝基苯甲醛(3-NBA)和4-硝基苯甲醛(4-NBA)。实验表明:1)Zn-1/AuE对于2-NBA识别电位为-0.533 V和-0.680 V,检测限为4.760μmol/L;对于4-NBA的识别电位为-0.467 V,检测限为5.823μmol/L;而对于3-NBA Zn-1/AuE没有明显电化学信号;2)Zn-1/AuE在包含多种有机干扰物的模拟废水体系中,可以实现对2-NBA和4-NBA选择性识别。An interesting scissors mode 1 D Zn(Ⅱ) metal-organic frameworks(MOFs) {[Zn(HL2-)(bipy)(H2O)] ·2 DMA}n(Zn-11,H3 L = trimesic acid, bipy = 2,2’-Dipyridyl, Zn-1) were synthesized and directly coated on at an Au electrode(AuE) surface to assemble a modified electrode(Zn-1/AuE). ZZnn-1 showed excellent electrochemical stability and electro-conductivity and it was used as an electrochemical sensor for recognizing or distinguishing three isomeric nitrobenzaldehydes, 2-nitrobenzaldehydes(2-NBA), 3-nitrobenzaldehydes(3-NBA) and 4-nitrobenzaldehydes(4-NBA) in water systems. The experiments indicated that 2-NBA was detected on ZZnn-1/AuE with two oxidation peak potentials-0. 533 V and-0. 680 V, 4-NBA was detected with the oxidation peak potential-0. 467 V and there was no obvious signals for 3-NBA. Furthermore, Zn-1/AuE showed excellent distinguishing effect towards 2-NBA or 4-NBA in mimic waste water environment.

关 键 词：金属有机框架 电化学传感器 硝基苯甲醛 同分异构体识别 

分 类 号：O657.1[理学—分析化学]