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A Bi-metallic MOF Catalyst via Sensitive Detection & Adsorption of Fe3+ Ions for Size-selective Reaction Prompting

Abstract

A Cadmium(II)-based MOF, Cd-MDIP, was successfully prepared by hydrothermal reaction between tetra-carboxylic ligand 5,5'-methylenebisophthalic acid (H4MDIP) and cadmium perchlorate. The X-ray crystal structure analysis exhibited that there are two uncoordinated carboxyl groups in each ligand and a 1D elliptical channel along [001] direction. Because of the existence of uncoordinated carboxyl groups within open frameworks, Cd-MDIP exhibited high sensitivity (Stern-Volmer constant KSV = 4.13 × 104 L/mol) and low detection limit (80 nM) for Fe3+ ions in pure water, which is much lower than the national standard for Fe3+ in daily drinking water (5.4 μM) set by the Ministry of Environmental Protection of P. R. China. Most importantly, Cd-MDIP also featured the ultrahigh adsorption of Fe3+ in aqueous solution that can not be destroyed even by EDTA /base. Importantly, the MOF material (Cd-MDIPFe3+) after adsorbing Fe3+ could act as the first example of an excellent bi-metallic Lewis-acid catalyst for the cyanosilylation reaction of aromatic aldehydes in a size-selective fashion, and their efficiency was almost 10-times higher than that of the original Cd-MDIP.

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Publication details

The article was received on 25 Mar 2018, accepted on 04 May 2018 and first published on 08 May 2018


Article type: Paper
DOI: 10.1039/C8DT01145A
Citation: Dalton Trans., 2018, Accepted Manuscript
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    A Bi-metallic MOF Catalyst via Sensitive Detection & Adsorption of Fe3+ Ions for Size-selective Reaction Prompting

    Y. Li, Z. Chang, F. Huang, P. Wu, H. Chu and J. Wang, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT01145A

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