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The synthesis and characterization of Zn(ii)/Cd(ii) based MOFs by a mixed ligand strategy: a Zn(ii) MOF as a dual functional material for reversible dye adsorption and as a heterogeneous catalyst for the Biginelli reaction

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Abstract

Two mixed ligand MOFs, {[Zn2(5NO2-IP)2(L)2](H2O)}n (ADES-1) and {[Cd2(5NO2-IP)2(L)2(H2O)4](L)(H2O)(CH3OH)6}n (ADES-2) (where 5NO2-IP = 5-nitroisophthalate and L = (E)-N′-(pyridin-3-ylmethylene)nicotinohydrazide), have been synthesized and characterized via various analytical methods, including SXRD analysis. SXRD analysis revealed that both MOFs adopt an identical two-dimensional network topology. ADES-1 with bulk phase purity has been synthesized via a conventional reflux method and its potential applications as a functional material for reversible dye adsorption and as an efficient heterogeneous catalyst for the Biginelli reaction were exploited. ADES-1 exhibited the rapid and efficient adsorption of both cationic and anionic dye molecules with a slight preference for methyl violet (86%) compared to the other dyes that were investigated. A separation study involving a mixture of dyes and the application of ADES-1 as a column filler for the separation of organic dyes from water are also demonstrated. Moreover, the catalytic performance of ADES-1 towards a multi-component Biginelli reaction to yield 3,4-dihydropyrimidin-2(1H)-ones (DHPM) derivative has been studied. Finally, studies of the utilization of ADES-1 for dye adsorption and its catalytic activity revealed good stability and reusability, enabling it to be a potential functional material, and possible dye adsorption and Biginelli reaction mechanisms are also proposed.

Graphical abstract: The synthesis and characterization of Zn(ii)/Cd(ii) based MOFs by a mixed ligand strategy: a Zn(ii) MOF as a dual functional material for reversible dye adsorption and as a heterogeneous catalyst for the Biginelli reaction

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Article information


Submitted
20 Aug 2020
Accepted
29 Sep 2020
First published
30 Sep 2020

Mater. Chem. Front., 2020, Advance Article
Article type
Research Article

The synthesis and characterization of Zn(II)/Cd(II) based MOFs by a mixed ligand strategy: a Zn(II) MOF as a dual functional material for reversible dye adsorption and as a heterogeneous catalyst for the Biginelli reaction

U. Patel, B. Parmar, P. Patel, A. Dadhania and E. Suresh, Mater. Chem. Front., 2020, Advance Article , DOI: 10.1039/D0QM00611D

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