摘要
设计并合成了Cd基金属有机骨架(MOF)[Cd(BDC)(BPZ)(H2O)]n(1),其中BPZ=3,3’,5,5’-四甲基-1H,1’H-4,4’-联吡唑,H_(2)BDC=对苯二甲酸。化合物1具有三维孔道,其孔壁内有多个—CH3基团和自由的羧基氧原子,甲基基团的存在显著提高了MOF的疏水性和稳定性。另外,甲基和未配位的羧基氧原子可通过氢键或范德瓦耳斯作用力增强与多巴胺(DA)分子作用。1对DA具有灵敏的电化学传感性能。制备的1/GCE电极的差分脉冲伏安(DPV)测试结果显示其检测DA的线性范围为0.4~764.7μmol·L^(-1),检出限为56.8 nmol·L^(-1)。在常见干扰物的存在下,电极的DPV响应电流无明显变化。电极用于实际样品检测时的回收率在95.23%~100.90%之间。
A Cd-based metal-organic framework(MOF)[Cd(BDC)(BPZ)(H2O)]n(1),where BPZ=3,3′,5,5′-tetramethyl-1H,1′H-4,4′-bipyrazole and H2BDC=terephthalic acid,was designed and synthesized.Compound 1 possesses a 3D pore structure with—CH3 groups and free carboxyl oxygen atoms on the pore walls.The presence of methyl groups significantly enhances the hydrophobicity and stability of MOF.Moreover,the methyl group and uncoordinated carboxyl oxygen atoms can interact with dopamine(DA)molecules through hydrogen bonding or van der Waals interactions,endowing in 1 with sensitive electrochemical sensing properties for DA.The differential pulse voltammetry(DPV)test of the prepared 1/GCE electrode showed that it had a wide linear range of 0.4 to 764.7μmol·L^(-1) for detecting DA,and the detection limit was as low as 56.8 nmol·L^(-1).The DPV response current of the electrode remained unchanged in the presence of common interferents.When the electrode was applied for real sample analysis,the recovery rates ranged from 95.23%to 100.90%.CCDC:2320732.
作者
马甜甜
李素梅
张丞雨
续璐
白乙艳
付云龙
籍文娟
杨海英
MA Tiantian;LI Sumei;ZHANG Chengyu;XU Lu;BAI Yiyan;FU Yunlong;JI Wenjuan;YANG Haiying(Key Laboratory of Magnetic Molecules and Magnetic Information Materials,College of Chemistry and Materials Science,Shanxi Normal University,Taiyuan 030032,China;Department of Applied Chemistry,Yuncheng University,Yuncheng,Shanxi 044000,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2024年第4期725-735,共11页
Chinese Journal of Inorganic Chemistry
基金
运城市科技局基础研究项目(No.YCKJ-2020065)资助。
关键词
金属有机骨架
电化学传感
多巴胺
metal-organic framework
electrochemical sensing
dopamine
