Sensitive Current Sensor Based on a Lanthanide Framework with Lewis Basic Bipyridyl Sites for Cu2+ Detection

Chenglong Liang; Shiyi Tan; Lixiong Shao; Xinxin Xue; Jiahao Liu; Nannan Liu; Weibing Zhang; Qian Shi

doi:10.1021/acs.inorgchem.3c00865

Sensitive Current Sensor Based on a Lanthanide Framework with Lewis Basic Bipyridyl Sites for Cu²⁺ Detection

Inorg Chem. 2023 Jun 19;62(24):9508-9517. doi: 10.1021/acs.inorgchem.3c00865. Epub 2023 Jun 9.

Authors

Chenglong Liang^{1

2}, Shiyi Tan^{1

3}, Lixiong Shao¹, Xinxin Xue^{1

2}, Jiahao Liu^{1

3}, Nannan Liu^{1

2

3}, Weibing Zhang¹, Qian Shi^{1

2}

Affiliations

¹ College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.
² Institute of New Materials & Industry Technology, Wenzhou University, Wenzhou 325000, P. R. China.
³ Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325027, P. R. China.

PMID: 37296395
DOI: 10.1021/acs.inorgchem.3c00865

Abstract

A new Yb-based three-dimensional metal-organic framework with free Lewis basic sites, [Yb₂(ddbpdc)₃(CH₃OH)₂] (referred to as ACBP-6), from YbCl₃ and (6R,8R)-6,8-dimethyl-7,8-dihydro-6H-[1,5]dioxonino[7,6-b:8,9-b']dipyridine-3,11-dicarboxylic acid (H₂ddbpdc) was synthesized by a conventional solvothermal method. Two Yb³⁺ are connected by three carboxyl groups to form the [Yb₂(CO₂)₅] binuclear unit, which is further bridged by two carboxyl moieties to produce a tetranuclear secondary building unit. With further ligation of the ligand ddbpdc^2-, a 3-D MOF with helical channels is constructed. In the MOF, Yb³⁺ only coordinates with O atoms, leaving the bipyridyl N atoms of ddbpdc^2- unoccupied. The unsaturated Lewis basic sites make this framework possible to coordinate with other metal ions. After growing the ACBP-6 in situ into a glass micropipette, a novel current sensor is formed. This sensor shows high selectivity and a high signal-to-noise ratio toward Cu²⁺ detection with a detection limit of 1 μM, due to the stronger coordination ability between the Cu²⁺ and the bipyridyl N atoms.