Robust Cd(4,5-Imdb)-MOF for Lewis-Acid Assisted Catalysis and Selective Sensing of 2,4,6-Trinitrophenol

Ganapathi Anantharaman; Sharad Kumar Sachan; Anjali Rajora; Subham Ojha

doi:10.1002/asia.202401046

Robust Cd(4,5-Imdb)-MOF for Lewis-Acid Assisted Catalysis and Selective Sensing of 2,4,6-Trinitrophenol

Chem Asian J. 2024 Nov 22:e202401046. doi: 10.1002/asia.202401046. Online ahead of print.

Authors

Ganapathi Anantharaman¹, Sharad Kumar Sachan², Anjali Rajora², Subham Ojha²

Affiliations

¹ IIT Kanpur: Indian Institute of Technology Kanpur, Department of Chemistry, Department of Chemistry, IIT Kanpur, 208016, Kanpur, INDIA.
² Indian Institute of Technology Kanpur, Department of Chemistry, IIT Kanpur, 208016, Kanpur, INDIA.

PMID: 39576185
DOI: 10.1002/asia.202401046

Abstract

Developing multifunctional metal-organic frameworks (MOFs) for effective catalysis and sensing remains a significant challenge. This study presents the synthesis of an imidazole-based angular linker, 4,4'-(1-methyl-1H-imidazole-4,5-diyl)dibenzoic acid (4,5-H2Imdb), which is used in the synthesis of the Cd(4,5-Imdb)-MOF. This MOF demonstrates robust and recyclable properties, making it suitable for solvent-free Strecker synthesis and in the detection of the secondary explosive 2,4,6-trinitrophenol (TNP) molecule, with a limit of detection (LOD) of 7.5 ppb in methanol. The material's hydrolytic stability and reusability are thoroughly evaluated. Additionally, density functional theory (DFT) calculations provide insights into the selective detection mechanism of TNP. These findings highlight the potential of Cd(4,5-Imdb)-MOF in catalysis and sensing applications.

Keywords: 4,4'-(1-methyl-1H-imidazole-4,5-diyl)dibenzoic acid (4,5-H2Imdb) * Cadmium * 2,4,6-Trinitrophenol (TNP) * Sensing * MOF.