A twofold interpenetrated two-dimensional zinc(II) coordination polymer for the highly sensitive detection of nitrofurantoin in aqueous medium.

A novel ZnII coordination polymer, namely, poly[{μ2 -bis[4-(2-methyl-1H-imidazol-1-yl)phenyl]methanone-κ2 N3 :N3' }(μ2 -5-bromobenzene-1,3-dicarboxylato-κ2 O1 :O3 )zinc(II)], [Zn(C8 H3 BrO4 )(C21 H18 N4 O)]n or [Zn(Br-BDC)(MIPMO)]n , (I), has been synthesized by the solvothermal method using 5-bromoisophthalic acid (Br-H2 BDC), bis[4-(2-methyl-1H-imidazol-1-yl)phenyl]methanone (MIPMO) and Zn(NO3 )2 ·6H2 O. Structure analysis showed that compound (I) displays twofold parallel interwoven sql nets. Fluorescence experiments confirmed that the compound can sensitively and selectively detect nitrofurantoin (NFT) in aqueous medium. In addition, the possible fluorescence quenching mechanisms of compound (I) toward NFT are investigated.