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Six hydrous Cd(II) coordination polymers based on a scorpion-like 5-(3-pyridylmethoxy)isophthalic acid (H 2 L), namely {[CdL(H 2 O)]·2H 2 O} n ( 1 ), [Cd 4 L 4 (H 2 O) 4 ] n ( 2 ), [CdL(H 2 O)] n ( 3 ), [CdL(H 2 O) 2 ] n ( 4 ), {[CdL(H 2 O)]·H 2 O} n ( 5 ) and [CdL] n ( 6 ), were hydrothermally synthesized and characterized by EA, IR, PXRD, TG-DSC and X-ray structural analysis. Temperature and solvent play crucial roles in the preparation of the coordination polymers. Complexes 1 – 3 were prepared in a H 2 O-DMF (6:2) solvent system at slightly different temperature (85, 100 and 120 °C). Complexes 4 – 6 were prepared in different H 2 O-DMF solvents (6:3 and 8:2) and H 2 O-MeCN (3:6) solvent. These complexes possess different coordinated and/or lattice water molecules, and exhibit structural diversity and various topology nets. Complex 1 is a 2D double-layered coordination polymer. Complex 2 features a 3D porous framework with irl topology. Complex 3 displays a 2D double-layered network. Complex 4 is a 3D coordination polymer with sra topology. Complex 5 exhibits a 3D wave-like framework with sra topology. Complex 6 is a 3D coordination polymer with self-catenated hxg-d topology. 5-(3-Pyridylmethoxy)isophthalate adopts three types of coordination modes. These complexes exhibit higher thermal stability and emit strong luminescence. [ABSTRACT FROM AUTHOR]

Three Cu(I)-cyanide coordination polymers based on trigonal 1,3,5-tris(1H-imidazol-1-yl)benzene (tib) ligand, namely [Cu 3 (CN) 3 (tib)] n ( 1 ), [Cu 4 (CN) 4 (tib)] n ( 2 ), and [Cu 2 (CN) 2 (tib)] n ( 3 ), have been prepared and characterized by elemental analysis, IR, PXRD, thermogravimetry and single-crystal X-ray diffraction analysis. Complex 1 displays a 3D metal-organic framework with nanosized pores. Complex 2 is a 3D coordination polymer assembled by three μ 2 -cyanides and a μ 3 -cyanide with a very short Cu(I)···Cu(I) metal bond(2.5206 Å). Complex 3 is a 2D coordination polymer constructing from 1D Cu(I)-cyanide zigzag chain and bidentate tib spacer. Three Cu(I) complexes are thermally stable up to 250–350 °C. Complexes 1 – 3 show similar orange emission band at 602 nm originating from LMCT mechanism. [ABSTRACT FROM AUTHOR]

Six coordination polymers based on 5-(3-pyridylmethoxy)isophthalic acid (H 2 L), namely [Zn 2 L 2 ] n ( 1 ), [Zn 2 L 2 (1,3-bix)] n ( 2 ), [CdL(1,3-bix)] n ·2 n H 2 O ( 3 ), [CdL(azpy) 0.5 (H 2 O)] n ( 4 ), [CdL(btx) 0.5 ] n ( 5 ), and [CdL(btmb)] n ·2 n H 2 O ( 6 ) (1,3-bix = 1,3-bis(imidazol-1-ylmethyl)benzene, azpy = 4,4′-azobispyridine, btx = 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene, btmb = 4,4′-bis(1,2,4-triazol-1-ylmethyl)biphenyl), have been synthesized and characterized by elemental analyses, IR spectra, PXRD, thermogravimetry and X-ray structural analysis. Complex 1 is a 3D coordination polymer, simplified as a 4-nodal (4,4,5,5)-connected topology net with point symbol {4 3 .6 3 }{4 3 .6 2 .8}{4 4 .6 5 .8}{4 4 .6 4 .8 2 }. Complex 2 is a 3D coordination polymer, simplified as a crs - d topology net with point symbol {6;8 2 }{6 2 ;8 3 ;10}. Complex 3 is a 2D coordination polymer with a 2-nodal (3,5)-connected topology net. Complex 4 exhibits a 2D double-layered network with a 2-nodal (3,4)-connected topology net, assembled by two parallel [CdL] n layers pillared by azpy spacer. Complex 5 is a 3D coordination polymer, simplified as a 2-nodal (3,8)-connected topology net with point symbol {4 3 } 2 {4 6 .6 18 .8 4 }. Complex 6 shows a 2D double-layered network with a 2-nodal (3,5)-connected topology net, constructed from wave-like [CdL] n network pillared by btmb spacer. 5-(3-Pyridylmethoxy)isophthalate exhibits five types of coordination modes. Anhydrous or dehydrated substances of 1 – 6 were thermally stable to 300–400 °C. These Zn(II)/Cd(II) complexes emit blue luminescence originating from ligand-centered emission. [ABSTRACT FROM AUTHOR]

Novel functional composite materials based on chitosan (CTS), composites with both electrorheological (ER) performance and luminescence property have been synthesized by a very simple grinding method. The biocompatible chitosan, as well as the Tb(NO3)3·6H2O, La(NO3)3·6H2O and sulphosalicylic acid (C7H6O6S·2H2O, SSA) were chosen as starting materials. The composition, ER performance, luminescence property and dielectric property of the materials have been studied. Our results show that sulphosalicylic acid (SSA) and the rare earth (RE=Tb, La) complexes (TbSSA, TbLaSSA) in the material may enhance the ER performance of chitosan. The material (CTSTbSSA) containing the complex (TbSSA) of Tb3+ ion has the highest ER activity among the studied materials. The composition and structure of the RE complexes are the dominant factors in improving the ER effect. The materials (CTSTbSSA, CTSTbLaSSA) containing the RE complexes exhibit fine luminescence performance. The material with both ER activity and luminescence performance is a novel multifunction material which would have the prospect of a wide application. [ABSTRACT FROM AUTHOR]

Highlights: [•] Six 3-(4-hydroxypyridinium-1-yl)phthalate coordination polymers were prepared. [•] Complex 4 exhibits a 1D nano-tubular structure with larger cavity occupied by (H2O)5 cluster. [•] Four typical coordination modes of 3-(4-hydroxypyridinium-1-yl)phthalate are observed. [•] Complexes 1 and 3 exhibit blue luminescence. [ABSTRACT FROM AUTHOR]

Abstract: Seven new organic–inorganic hybrid compounds containing inorganic polyoxometalates and trigonal organic ligand 2,4,6-tris-(3/4-pyridyl)-1,3,5-triazine (3/4-tpt), namely [Mo8O26M(Htpt)2(H2O)2] n (M=Zn (1), Co (2), Ni (3)), [Mo8O26Cu(Htpt)2(H2O)2] n ·2nH2O (4), [Mo8O26(H2tpt)2]·6H2O (5), [Mn(Mo4O13)(4-tpt)2] n (6) and [Fe3(Mo4O15)(3-tpt)] n ·nH2O (7), were synthesized hydrothermally and characterized by EA, IR, TG, and PXRD techniques. Single crystal X-ray structural analysis revealed that compounds 1–4 are 1-D coordination polymers constructed from [Mo8O26]4− cluster and [M(Htpt)2(H2O)2]4+ fragments. Compound 5 is an isolated cluster composed of [Mo8O26]4− anion and monodentate H2tpt2+ cation. 3-Tpt ligands in 1–5 are partially protonated and act as monodentate ligands. Octamolybdates adopt β- and γ-[Mo8O26]4− structural mode in compounds 1–4 and 5, respectively. In compound 6, each [Mo4O13]2− tetramer links four Mn(II) ions to form a 2-D wave-like polymeric layer. The 2-D [MnMo4O13] bimetallic layers are pillared by neutral 4-tpt bidentately to generate a 3-D metal–organic framework. Compound 7 is a 3-D coordination polymer constructed from 2-D [Fe3(Mo4O15)] bimetallic polymeric layer and pillared by neutral tridentate 3-tpt. These compounds are thermal stable under 250°C. The compounds 1 and 5 display luminescence with emission maximum at 481 and 442nm, respectively. [Copyright &y& Elsevier]

Abstract: Four novel coordination polymers constructed from flexible pamoic acid, namely [Co(pam)(4,4′-bipy)] n ·nH2O (1), [Ni(pam)(4,4′-bipy)(H2O)2] n ·2nCH3CN (2), [Cd(pam)(py)2] n ·npy (3) and [Mn2(pam)2(py)6(H2O)2] n ·2npy (4), (H2pam=pamoic acid, 4,4′-bipy=4,4′-bipyridine, py=pyridine), have been synthesized and characterized by elemental analysis, infrared spectra and X-ray crystallography. Complex 1 is a 2-D coordination polymer constructed from chelating bis-bidentate pam and 4,4′-bipyridine bridging ligands. Complex 2 is a 2-D coordination polymer assembled by bis-monodentate pam and 4,4′-bipyridine, where acetonitrile is filled in the rectangle channels. Both 2-D coordination polymers display undulated (4,4) grid layers as sql topology. Complex 3 displays a 1-D polymeric chain using chelating bis-bidentate pam as bridging ligand. Complex 4 exhibits an interesting bis-monodentate pam-Mn(II) 1-D polymeric chain, in which exist two-type six-coordinated manganese centers. Mn(1) is bound to four pyridine ligands, whereas Mn(2) is combined to two pyridine and two H2O molecules. Their thermal stabilities have been investigated. Cadmium complex 3 displays strong green luminescence with emission maximum at 543nm. [Copyright &y& Elsevier]

Hydrothermal reactions of AgNO 3 , K 3 [Fe(CN) 6 ] with N-heterocyclic ligands afforded three novel Ag(I)–cyanide coordination polymers, [Ag 2 (CN) 2 (tpt)] n ( 1 ), {[Ag(CN)(bpe) 0.5 ][Ag(CN)]} n ( 2 ) and [Ag(CN)(btmb) 0.5 ] n ( 3 ) (tpt = 2,4,6-tris(4-pyridyl)-1,3,5-triazine, bpe = 1,2-bis(4-pyridyl)ethane, btmb = 1,2-bis(1,2,4-triazol-1-ylmethyl)benzene). In complex 1 , two Ag(CN) linear chains are bridged by bidentate tpt ligand to form a ladder-like structure, which are further connected by Ag Ag metal bond to generate a 2D polymeric network. Complex 2 is an interesting 3D supramolecular architecture assembled by 2D [Ag 1 (CN)(bpe) 0.5 ] n network and linear [Ag 2 (CN)] n chain combined by strong Ag Ag metal bond. Complex 3 is a 1D ladder-like double-chain polymer constructed from Ag–cyanide linear chains and btmb spacer, which is further extended to a 2D supramolecular network by Ag–Ag weak interaction. The Ag–Ag metal interactions play important roles in the construction of three coordination polymers. Complexes 1 and 2 are respectively thermally stable at 300 and 180 °C. Complexes 1 and 3 emit strong blue luminescence. [ABSTRACT FROM AUTHOR]

Abstract: Hydrothermal reaction of CuCN with 2,5-bis(3-pyridyl)-1,3,4-oxadiazole (3-bpo) affords a wave-like infinite chain coordination polymer [Cu2(CN)2(3-bpo)] n (1). Replacement of 3-bpo by its isomer 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (4-bpo) could yields polymer [Cu(CN)(4-bpo)] n (2). In the complex 1, the bent 3-bpo ligand adopts bidentate chelating mode binds with the Cu(I)-cyanide chain to form 16-membered macrocyclic structure. The complex 2 exhibits a layered metal–organic framework, in which exo-bidentate 4-bpo ligand connects the Cu(I)-cyanide chains to form 2-D rectangle grid. Both of these Cu(I) complexes are thermal stable under 200°C and release 3-bpo or 4-bpo ligand in 200–360°C. Luminescent study reveals that 1 has green-light emission, while 2 has blue-light emission. [Copyright &y& Elsevier]

Abstract: Four copper(I) cyanide coordination polymers containing 2-(n-pyridyl)benzimidazole ligands, namely [Cu2(CN)(2-PyBIm)] n (1), [Cu2(CN)2(3-PyHBIm)] n (2), {[Cu3(CN)3(4-PyHBIm)4]·2H2O} n (3) and [Cu5(CN)3(4-PyBIm)2] n (4), have been synthesized and characterized by X-ray crystallography. Complex 1 is a one-dimension coordination polymer in which 2-(2-pyridyl)benzimidazole is deprotonated and adopts a bridging tridentate coordination mode. Complex 2 has ladder-like structure in which 2-(3-pyridyl)benzimidazole does not deprotonate and acts as a bidentate bridge. Complex 3 displays a saddle-shaped helical chain constructed through μ2-cyanide group and the outstretched neutral 2-(4-pyridyl)benzimidazole monodentate ligand. Complex 4 shows two-dimension layer polymeric structure in which deprotonated 2-(4-pyridyl)benzimidazole acts as a tridentate bridging ligand. The cyanide groups in four complexes all act as bidentate bridging ligands. These complexes are thermal stable and display luminescence in the solid states. [Copyright &y& Elsevier]

[Display omitted] • Six 5,5′-(1,2-phenylenebis(methoxy))diisophthalate coordination polymers were prepared. • The tetracarboxylic acid displays seven types of coordination modes. • These complexes exhibit 2D networks and 3D porous MOFs. • Mn(II) complexes 1 and 2 have antiferromagnetic couplings. Mn(II)/Cd(II) nitrates react with 5,5′-(1,2-phenylenebis(methoxy))diisophthalic acid (H 4 L) and four dipyridyl-typed N -donor ligands to afford six coordination polymers, {[Mn 2 (L)(bpee) 2 ]·DMF} n (1), {[Mn 3 (H 2 L) 3 (bpmp)(H 2 O) 2 ]·2DMF·2H 2 O} n (2), {[(CH 3) 2 NH 2 ] 2 [Cd(L)]·2H 2 O} n (3), [Cd 2 (L)(H 2 O) 2 (DMF)] n (4), {[Cd(L) 0.5 (bpdb)]·DMF} n (5) and [Cd(H 2 L)(bpp)(H 2 O)] n (6) [bpee = 1,2-bis(4-pyridyl)ethylene, bpmp = 1,4-bis(4-pyridylmethyl)piperazine, bpdb = 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene, bpp = 1,3-bis(4-pyridyl)propane]. These complexes were characterized by elemental analyses, IR spectra, PXRD, thermogravimetry and X-ray structural analysis. H 4 L displays seven types of coordination modes in them. Four complexes are 3D coordination polymers, except 2D wave-like network of complex 3 and 1D double-chain polymer of complex 6. Cd(II) complexes 3 , 4 and 6 display strong blue luminescence. Complex 1 exhibits weak antiferromagnetic coupling in [Mn 2 (μ 2 -COO) 2 (COO) 2 ] dimer, while complex 2 shows antiferromagnetic coupling in [Mn 3 (μ 2 -COO) 6 ] trinuclear cluster. [ABSTRACT FROM AUTHOR]

Three copper(I) cyanide coordination polymers, namely [Cu 8 (CN) 8 (btmb) 2 ] n ( 1 ), [Cu(CN)(btmb) 0.5 ] n ( 2 ) and [Cu 2 (CN) 2 (dpa)] n ( 3 ) (btmb = 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene, dpa = di(4-pyridyl)amine), were synthesized under hydrothermal conditions and characterized by elemental analyses, IR spectra, PXRD and thermogravimetric analyses. Single-crystal X-ray diffraction analyses reveal that complex 1 is an interesting 2D double-layered network constructing from eight distinct Cu(I) centers, eight μ 2 -cyanides and two tetradentate cis -btmb ligands. Complex 2 is a ladder-like coordination polymer assembled by CuCN linear chain and bidentate trans -btmb linker. Complex 3 has a 2D wave-like network constructing from CuCN zigzag chain and V-shape dpa spacer. These coordination polymers are thermally stable up to 270–300 °C. They emit blue luminescence originating from ligand-centered emission. [ABSTRACT FROM AUTHOR]

Highlights: [•] Three camphorate coordination polymers were prepared. [•] Complex 1 is a chiral 1D helical chain polymer and 2 exhibits a chiral 2D network. [•] Complex 3 is an achiral 2D polymer in which partial d-camphorate changes to l-camphorate. [•] Complexes 1 and 2 show violet luminescence, 3 exhibits an antiferromagnetic interaction. [ABSTRACT FROM AUTHOR]

Four cadmium complexes with flexible polycarboxylic acid ligands have been synthesized. The bidentate auxiliary ligands with different lengths and flexibility play an important role to affect their final structures. The luminescent sensing of compounds 1 and 4 toward nitrobenzene has also been investigated. • Four cadmium coordination polymers have been synthesized by using flexibly carboxylic ligand. • The auxiliary ligands play an important role to affect their final structures. • Compound 1 and 4 might be developed as a functional luminescent probe for detecting nitrobenzene. Reactions of cadmium ions with the flexible tetracarboxylic ligand, 5-(bis(4-carboxybenzyl)amino) isophthalic acid (H 4 L) gave rise to four complexes, namely {[(Me 2 NH 2) 2 Cd 3 (L) 2 ]∙10H 2 O)} n (1), {[Cd 2 (L)(pdp)(H 2 O) 2 ]∙2DMF·4H 2 O} n (pdp = 4-[(E)-4-Pyridinylazo]pyridine) (2), {[Cd 2 (L)(bpe)(H 2 O) 2 ]∙2DMF·4H 2 O} n (bpe = 1,2-bi(4-pyridyl)ethene) (3) and {[Cd 4 (L) 2 (bpmp) 3 ]∙2H 2 O} n (bpmp = N,Nʹ -bis-(4-pyridyl-methyl) piperazine) (4). Compound 1 features a three-dimensional anionic architecture constructed by triangular Cd 3 cluster and ligands, with rectangle channels encapsulating [Me 2 NH 2 ]+ cations. Compounds 2 and 3 present similar structures, exhibiting the 2D polythreading layer. Compound 4 possesses a 3D structure with 4,6-connected new topology. The powder X-ray diffraction, the thermal stabilities, and solid-state luminescence properties were studied for 1 – 4. Furthermore, the luminescent sensing of compounds 1 and 4 toward nitrobenzene has also been investigated. [ABSTRACT FROM AUTHOR]

Two new Cd(II) coordination polymers based on a flexible ligand 5-(bis(4- carboxybenzyl)amino)isophthalic acid (H 4 L) namely {[Cd 2 (L)(NMP) 2 (H 2 O) 2 ]·H 2 O} n (1) and{[Cd 4 (L) 2 (NMP) 2 (H 2 O)]∙2NMP} n (2) (NMP=N-methyl-2-pyrrolidone) have been prepared under hydrothermal conditions. Structural analyses revealed that 1 and 2 all exhibit three-dimensional network structures. Compound 1 shows 4-connect crb topology with [Cd 2 (CO 2) 4 ] as secondary building unit, while compound 2 can be regarded as a new 4,4,8-connect with a {411.615.82}{45.6}{46} topology with tetranuclear [Cd 4 (CO 2) 8 ]. By step-wise synthesis, tetranuclear cluster-based {[Cd 4 (L) 2 (NMP) 2 (H 2 O)]∙2NMP} n (2) can be synthesized successfully by using compound 1. The powder X-ray diffraction, the thermal stabilities, and solid-state luminescence properties of compounds 1 – 2 have also been investigated. Two 3D Cd coordination polymers with different topology were synthesized successfully. By step-wise synthesis, binuclear-cluster units can be transferred to tetranuclear cluster. Image 1 • Achieving the structure transformation from binuclear units to tetranuclear units by employing a step-wise synthesis method. • Two cadmium coordination polymers have been synthesized by using flexibly carboxylic ligand. • A new topology with 4,4,8-connected 3-nodal net. [ABSTRACT FROM AUTHOR]