Issue 41, 2021

A porous anionic zinc(ii) metal–organic framework for gas adsorption, selective uptake of dyes and sensing of Fe3+ by Tb3+ ion encapsulation

Abstract

A three-dimensional (3D) metal–organic framework [(CH3)2NH2][Zn2(DMTDC)2(3-mtz)]·4DMF·3H2O (Zn-MOF) has been solvothermally synthesized by using mixed ligands of 3-methyl-1,2,4-triazole (3-Hmtz) and a thiophene-functionalized dicarboxylate ligand, 3,4-dimethylthieno[2,3-b]thiophene-2,5-dicarboxylic acid (H2DMTDC). Zn-MOF exhibits a uninodal 6-connected pcu α-Po topology structure and possesses an anionic framework with large 1D-trapezoidal channels. Gas adsorption studies reveal that the activated Zn-MOF-a displays selective adsorption of CO2 over N2 at 273 K and 298 K as well as a high isosteric heat of CO2 adsorption. Moreover, Zn-MOF shows selective adsorption of the cationic dyes over the anionic and neutral dyes, and can be used as a fast-response and sensitive probe for the detection of Fe3+ by fluorescence quenching after encapsulation of Tb3+ into the pores by postsynthetic cation exchange.

Graphical abstract: A porous anionic zinc(ii) metal–organic framework for gas adsorption, selective uptake of dyes and sensing of Fe3+ by Tb3+ ion encapsulation

Supplementary files

Article information

Article type
Paper
Submitted
11 aug 2021
Accepted
11 sep 2021
First published
14 sep 2021

CrystEngComm, 2021,23, 7348-7357

A porous anionic zinc(II) metal–organic framework for gas adsorption, selective uptake of dyes and sensing of Fe3+ by Tb3+ ion encapsulation

Y. Liang, J. Yao, M. Deng, Yan-E. Liu, Q. Xu, Q. Li, B. Jing, A. Zhu and B. Huang, CrystEngComm, 2021, 23, 7348 DOI: 10.1039/D1CE01074C

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