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Two novel lanthanide coordination polymers, {[Ln(stp)(bipy)(H2O)] ·(H2O)} n [Ln = Eu ( 1) and Dy ( 2)], were synthesized by hydrothermal reactions of 2-sulfoterephthalate (stp) and 4,4′-bipyridine (bipy) ligands with europium/dysprosium(III) salts. Structural analyses show that both complexes 1 and 2 are isomorphic and crystallize in the monoclinic crystal system with space group P21/ n. Complex 1 exhibits a two-dimensional grid-like structure from europium(III) ions bridged by the carboxyl and sulfonate groups of stp ligands. Notably, the stretching 4,4′-bipyridine ligands besides the 2D grid-like layers form π ···π interactions and interpenetrate into the empty voids of another adjacent layer into a twofold interpenetrated structure. Fluorescence analysis show that the emission of two complexes exhibit the characteristic peaks of lanthanide ions. [ABSTRACT FROM AUTHOR]

In this article, [Ag8(btc)2(2,2′-bpy)2] n (1) and [Ag4(btc)(phen)2] n (2) (H4btc = biphenyl-2,2′,4,4′-tetracarboxylic acid, 2,2′-bpy = 2,2′-bipyridine, phen = 1,10-phenanthroline) have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectra, thermogravimetric analyses, and single-crystal X-ray diffraction. Complex 1 shows a 3-D framework containing a 2-D bilayer network constructed from (btc)4− with Ag (I), whereas 2 features a 2-D supramolecular bilayer network. The differences of the two complexes demonstrate that nitrogen-containing chelating ligands have a significant effect on the formation and structure of the resulting complexes. Electrochemistry properties of 1 were also studied. [ABSTRACT FROM PUBLISHER]

Two new coordination polymers, [Zn(H2btc)(4,4'-bpy)2]n (1) and {[Cd(H2btc) (terpy)] · H2O}n (2) (H4btc = biphenyl-2,2',4,4'-tetracarboxylic acid, 4,4'-bpy = 4,4'-bipyridine, terpy = terpyridine), have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectra, and single-crystal X-ray diffraction. Complexes 1 and 2 are 1-D chains linked through partially deprotonated H4btc. The adjacent 1-D chains of 1 are further formed into 2-D supramolecular architecture through inter-chain N-H···O hydrogen bonds. In contrast, due to a different auxiliary ligand, the 1-D chains of 2 are further extended into 3-D supramolecular framework through inter-chain O-H···O hydrogen bonds. Thermal stabilities and luminescence of 1 and 2 were also studied. [ABSTRACT FROM AUTHOR]

abstract Two novel coordination polymers (CPs), [Cd 2 (cbta)(phen) 2 (H 2 O)] n (1), {[Zn 2 (cbta)(phen) 2 ] [Zn 2 (cbta) (phen) 2 (H 2 O)]·4H 2 O} n (2) (H 4 cbta = 1-(2-carboxylphenoxy)-2,3,5-benzene tricarboxylic acid; phen = 1,10-phenanthroline), were synthesized and characterized by elemental analyses, FT-IR spectra, single-crystal X-ray diffraction analyses. CP 1 shows a 2D network structure based on tetranuclear CdII clusters and (cbta)4- ligands, which are arranged in a [ABAB···] alternation to form a 3D supramolecular structures through π···π stacking interactions. Noticeably, CP 2 contains two kinds of independent units [Zn 2 (cbta)(phen) 2 ] (A) and [Zn 2 (cbta)(phen) 2 (H 2 O)]·4H 2 O (B) to form a 1D+1D structure. A shows 1D double chain based on Zn1, Zn2, which are recognized each other to generate a 2D supramolecular network (A) by hydrogen bonding interactions. While B are ring chains comprised of Zn3, Zn4, which are linked into 2D supramolecular network (B) through π···π stacking interactions. The peculiar structural feature is that the neighboring 2D networks are arranged in a [ABAB···] alternation to form a 3D supramolecular structure through hydrogen bonding interactions and C H···π and C H⋯O week interactions. Especially the (ctba)4- ligands in 1 – 2 adopt three different conformations and coordination modes. The thermal stabilities, XRD, UV, photoluminescence properties of CPs 1–2 were also studied. Remarkably, CPs 1–2 exhibit photocatalytic activities for degradation of dye (MB) under UV light irradiation and show good stabilities toward UV-light photocatalysis. Graphical abstract Two novel d10 metal CPs have been successfully synthesized and structurally characterized. 1 is a 2D network structure based on tetranuclear CdII clusters. 2 contains two kinds of independent units [Zn2(cbta)(phen)2] (A) and [Zn2(cbta) (phen)2(H2O)]·4H2O (B) to form an 1D+1D structure. The peculiar structural feature is that the neighboring A and B chains are arranged in a [ABAB···] alternation to form 3D supramolecular structure through hydrogen bonding interactions and π ... π stacking interactions. In addition, the thermal stability, photoluminescence and photocatalysis of 1–2 were also studied. Image 1 Highlights • Two Cd/Zn CPs with H 4 cbta and phen ligands. • 1 shows a 2D network based on tetranuclear CdII clusters and (cbta)4- ligand. • 2 contains two independent units (A) and (B) to form an 1D+1D structure. • The thermal stabilities and luminescence properties were also studied. • 1–2 exhibit photocatalytic activities for degradation of dye under UV light irradiation. [ABSTRACT FROM AUTHOR]

Two coordination polymers, {[Zn2(L)(bpy)] ·2H2O} n ( 1) and [Zn2(L)(bpe)] n ( 2) [H4L = terphenyl-2,2′,4,4′-tetracarboxylic acid, bpy = 4,4′-bipyridine, and bpe = 1,2-bis(4-pyridyl)ethane], were hydrothermally synthesized under similar conditions and characterized by elemental analysis, IR spectroscopy, TGA, and single-crystal X-ray diffraction analysis. Compound 1 has a 3D framework containing Zn-O-C-O-Zn 1D chains. Compound 2 exhibits a 3D framework, which features tubular channels. The channels are occupied by bpe molecules. The differences in the structures demonstrate that the auxiliary dipyridyl-containing ligand has a significant effect on the construction of the final framework. Additionally, the fluorescent properties of the two compounds were also studied in the solid state at room temperature. [ABSTRACT FROM AUTHOR]