A series of two-dimensional lanthanide coordination polymers: synthesis, structures, magnetism and selective luminescence detection for heavy metal ions and toxic solvents

Abstract

A series of two‐dimensional (2D) coordination polymers (CPs), namely poly[[bis(μ‐acetato)diaqua(μ6‐biphenyl‐3,3′,5,5′‐tetracarboxylato)bis(N,N‐dimethylacetamide)digadolinium(III)] N,N‐dimethylacetamide monosolvate], {[Gd2(C16H6O8)(C2H3O2)2(C4H9NO)2(H2O)2]·C4H9NO}n (CP1), poly[[bis(μ‐acetato)diaqua(μ6‐biphenyl‐3,3′,5,5′‐tetracarboxylato)bis(N,N‐dimethylacetamide)didysprosium(III)] N,N‐dimethylacetamide monosolvate], {[Dy2(C16H6O8)(C2H3O2)2(C4H9NO)2(H2O)2]·C4H9NO}n (CP2), poly[bis(μ‐acetato)diaqua(μ6‐biphenyl‐3,3′,5,5′‐tetracarboxylato)bis(N,N‐dimethylacetamide)dineodymium(III)], [Nd2(C16H6O8)(C2H3O2)2(C4H9NO)2(H2O)2]n (CP3), poly[bis(μ‐acetato)diaqua(μ6‐biphenyl‐3,3′,5,5′‐tetracarboxylato)bis(N,N‐dimethylacetamide)disamarium(III)], [Sm2(C16H6O8)(C2H3O2)2(C4H9NO)2(H2O)2]n (CP4), has been synthesized from rigid biphenyl‐3,3′,5,5′‐tetracarboxylic acid under solvothermal conditions. Their structures have been determined by single‐crystal X‐ray diffraction analyses, elemental analyses, IR spectra, powder X‐ray diffraction and thermogravimetric analyses, and CP1–CP4 crystallize in the monoclinic space group P21/n. CP1–CP4 are isomorphous and feature similar 2D double layers, which are further extended via interlayer hydrogen‐bonding interactions into a three‐dimensional (3D) supramolecular structure. Hydrogen‐bonding interactions between N,N‐dimethylacetamide molecules and carboxylate O atoms strengthen the packing of the layers. The organic ligands interconnect with metal ions to generate 2D layered structures with a (4,4)‐connected net having {44.62} topology. CP1 has been investigated for its magnetic properties and magnetic susceptibility measurements were carried out in the range 2.0–300 K. The results of the magnetic measurements show weak antiferromagnetic coupling between the GdIII ions in CP1. Moreover, the strong luminescence of CP2 and CP4 can be selectively quenched by the Fe3+ ion and toxic solvents (e.g. acetone).

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

“…One type is M-L-M and the second one is a Mn 2 L 2 ring to make this an unusual 4-connected net (Figure ) with 2-fold interpenetration . Few other examples on rectangular grids based 2D MOFs have been reported in the literature. − …”

“…For electrically conductive Cu­(II) 2D MOFs, Dincǎ et al . demonstrated chemiresistive sensing of VOCs through linear discriminant analysis and ambient CO 2 with RH sensitivity (400–2500 ppm). , A few more reports on solvents, VOCs, and gas sensing appeared in the literature. ,,,,,− …”

Di-functional luminescent sensors based on Y3+ doped Eu3+ and Tb3+ coordination polymers: fast response and visible detection of Cr3+, Fe3+ ions in aqueous solutions and acetone

“…Subsequently, an isostructural RE-CP (1-Y) was obtained through identical procedure (Scheme 1). 39,40 With careful adjustment of the relative ratio of Y 3+ /Eu 3+ and Y 3+ /Tb 3+ , two series of isomorphous RE-CPs, namely Eu x Y 1Àx and Tb x Y 1Àx , were successfully obtained through isomorphous substitution technique (Scheme 2). The powder X-ray diffraction (PXRD) proved the isostructural structures of the doped complexes and the pure RE-MOF ( Fig.…”

Proton conductivity study on three CS/IL@fle‐MOF membranes

“…As a new type of multifunctional nanoporous material, metal–organic frameworks (MOFs) constitute a type of crystalline framework material formed by chemical self‐assembly of inorganic metal ions or clusters and organic ligands. [ 17–20 ] Based on the chemical properties of high specific surface area, high porosity, and controlled pore size, the proton conductivities of MOF materials have caught the attention of researchers both at home and abroad. [ 21–26 ] It is reported that MOF materials can have low‐temperature (<373 K) and high‐temperature (>373 K) proton conductivity depending on structures.…”