Conductive metal organic framework for ion-selective membrane-free solid-contact potentiometric Cu2+ sensing

被引：13

作者：

Xu, Longbin ^{[1
]}

Gan, Shiyu ^{[1
]}

Zhong, Lijie ^{[1
]}

Sun, Zhonghui ^{[1
]}

Tang, Yitian ^{[1
]}

Han, Tingting ^{[1
]}

Lin, Kanglong ^{[1
]}

Liao, Chunxian ^{[1
]}

He, Dequan ^{[1
]}

Ma, Yingming ^{[1
]}

Wang, Wei ^{[1
]}

Niu, Li ^{[1
]}

机构：

[1] Guangzhou Univ, Ctr Adv Analyt Sci, Sch Chem & Chem Engn, Sch Civil Engn,Guangzhou Key Lab Sensing Mat & De, Guangzhou 510006, Peoples R China

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2022年 / 904卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Ion selective electrodes; Potentiometric sensor; Copper ion; Conductive MOF; ELECTRODES; MECHANISMS;

D O I：

10.1016/j.jelechem.2021.115923

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The conductive metal organic framework (MOF) discloses efficient electron transfer ability and its specific framework structure could realize ion recognition. The state-of-the-art solid-contact ion-selective electrodes (SC-ISEs) rely on both solid contact (SC) and ion-selective membrane (ISM) for respective functions of ion-to-electron transduction and ion recognition. Herein, we report an ISM-free SC-ISE by using the conductive MOF of Cu-3(HHTP)(2) (Cu as metallic nodes and 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) as triph-enylene-based organic linkers) as a bifunctional role of SC and ISM for Cu2+ sensing. The experimental results demonstrated a Nernstian and selective response to Cu2+ with a slope of 29.5 +/- 0.3 mV dec(-1). Compared with traditional Cu2+-ISM-based SC-ISEs, the potentiometric response time has been greatly reduced from similar to 50 s to 10 s. Moreover, the ISM-free conductive MOF could offer normal potentiometric responses even under a short conditioning time in solution (minutes). In addition, organic solvent tolerance has also been proved for the ISM-free conductive MOF-based SC-ISE. This work demonstrates that the MOF could be feasible for constructing a type of ISM-free solid potentiometric ion sensors.

引用

页数：8

共 46 条

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