A Luminescent Cd(II)-Based Metal −Organic Framework for Detection of Fe(III) Ions in Aqueous Solution

Publication date: Available online 11 February 2018 Source:Journal of Solid State Chemistry Author(s): Fen-fang Li, Miao-li Zhu, Li-ping Lu A novel Cd( (II)-organic framework [Cd(Hcbic)]n (H3cbic = 1-(4-carboxybenz-yl)−1H-benzoim-idazole-5, 6-dicarboxylic acid) was assembled and characterized by X-ray single crystal analysis. The Cd-MOF features one-dimensional left and right-handed double helical chains with screw-pitch of about 4.727Å and the 4-methyl benzoic acid groups of Hcbic2− ligands in MOF-1 play many ribbons distributing in the two sides of the 2D networks. It is found that MOF-1 shows high selectivity (K SV = 1.8 × 105 L / mol) for Fe3+ ions in water solution with luminescent quenching because of the existence of uncoordinated carboxyl groups within open frameworks, which indicates that MOF-1 is a simple and reliable detection sensing reagent for Fe3+ in practical applications. Graphical abstract

Source: Journal of Solid State Chemistry - February 11, 2018 Category: Chemistry Source Type: research