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Using a symmetrical aromatic carboxylic acid ligand, 4,4′-(pyridine-3,5-diyl)bis(3-fluorobenzoic acid) (H2L), three Co(II)-based metal–organic frameworks, namely, {[Co3(L)2(H2O)2(HCOO)2]}n (1), {[Co3(L)3(H2O)]·4H2O·2DMF}n (2) and {[Co5(L)4(H2O)4(μ3-H2O)2]·11H2O·6DMF·2(NO3)}n (3), have been solvothermally synthesized. Structural analysis demonstrates that 1–3 possess diverse secondary structural units (SBUs). 1 is a 3D network with a binodal (3,6)-connected Schläfli topology based on trinuclear [Co3(COO)4(HCOO)2N2] SBUs. Compound 2 possesses different trinuclear [Co3(COO)6N3(μ3-H2O)] SBUs, which are further extended by L2− to produce a 3D porous network containing 1D channels with a triangular shape along the c axes, and with an uncommon (3,9)-connected topology. In particular, 3 is constructed from unique pentanuclear [Co5(μ3-H2O)2N4(COO)8]2+ SBUs to form a (3,12)-connected network, and contains one-dimensional triangular channels. Furthermore, the desolvated frameworks of 2 and 3 show selective adsorption for C2H2 and CO2 over CH4 at 273 and 298 K. Moreover, the magnetic properties of 1–3 have been completely examined. [ABSTRACT FROM AUTHOR]

Abstract Six new transition metal coordination polymers (CPs) based on polycarboxylate and isomeric terpyridyl carboxylate ligands, namely, [Co(333cptpy) 2 ] n ·2 n H 2 O (1), [Co 2 (333cptpy) 2 (ox)(H 2 O) 2 ] n (2), [Co(233cptpy) 2 (H 2 O) 2 ] n (3), [Ni 2 (333cptpy) 2 (H1,3,5-btc)(H 2 O) 2 ] n ·2 n H 2 O (4), [Ni 2 (233cptpy)(1,3,5-btc)(H 2 O) 2 ] n ·3 n H 2 O (5), [Cu 3 (333cptpy) 2 (m -bdc) 2 ] n (6), (H333cptpy = 4′-(3-carboxyphenyl)-3,2′:6′,3"-terpyridine, H233cptpy = 4′-(2-carboxyphenyl)-3,2′:6′,3"-terpyridine, H 2 ox=oxalic acid, H 3 (1,3,5-btc) = benzene-1,3,5-tricarboxylic acid, H 2 (m -bdc) = benzene-1,3-dicarboxylic acid) have been obtained. Compound 1 exhibits a 1D loop chain structure. Compound 2 displays a (3,6)-connected 3D topological network with point symbol of {4.82} 2 {42.811.102}. Compound 3 is also a 1D loop chain structure. Compound 4 shows a (3,6)-connected 3D network with point symbol of {4.82} 2 {42.812.10}. Compound 5 demonstrates a classical 3D rtl network with point symbol of {4.62} 2 {42.610.83}. Compound 6 presents an interesting (3,4,6)-connected net based on paddle-wheel copper(II) units with point symbol of {4.62} 2 {42.68.83.102}{64.82}. The magnetic properties are discussed in detail. Graphical abstract Six new coordination polymers (CPs) based on polycarboxylate and isomeric terpyridyl carboxylate ligands, namely, [Co(333cptpy) 2 ] n ·2 n H 2 O (1), [Co 2 (333cptpy) 2 (ox)(H 2 O) 2 ] n (2), [Co(233cptpy) 2 (H 2 O) 2 ] n (3), [Ni 2 (333cptpy) 2 (H1,3,5-btc) (H 2 O) 2 ] n ·2 n H 2 O (4), [Ni 2 (233cptpy)(1,3,5-btc)(H 2 O) 2 ] n ·3 n H 2 O (5), [Cu 3 (333cptpy) 2 (m -bdc) 2 ] n (6), (H333cptpy=4′-(3-carboxyphenyl)-3,2′:6′,3"-terpyridine, H233cptpy = 4′-(2-carboxyphenyl)-3,2′:6′,3"-terpyridine, H 2 ox=oxalic acid, H 3 (1,3,5-btc) = benzene-1,3,5-tricarboxylic acid, H 2 (m -bdc) = benzene-1,3-dicarboxylic acid) have been synthesized. The magnetic properties are discussed in detail. fx1 Highlights • Six new transition metal coordination polymers (CPs) have been synthesized. • Isomeric terpyridyl carboxylate ligands display multiple coordination modes. • Crystal structures and magnetic properties have been discussed. [ABSTRACT FROM AUTHOR]

Graphical abstract Three new series of lanthanide coordination polymers [LnL 2 (H 2 O) 4 ] n ·nNO 3 (Ln = Eu (1), Tb (2), Sm (3), Gd (4), Dy (5), Ho (6), Nd (7)), [LnL 2 (H 2 O) 4 ] n ·nCl (Ln = Yb (8), Er (9)) and [LnL(H 2 O) 2 (NO 3) 2 ] n (Ln = Sm (10), Nd (11)) assembled through an asymmetrical N-heterocyclic rigid carboxylate ligand (HL) were solvothermally constructed. A series of doped [Eu x Tb (1-x) L 2 (H 2 O) 4 ] n ·nNO 3 compounds with different doping molar ratios were also prepared. And the Eu(III)/Tb(III) molar ratio and the excitation wavelengh ([Eu(III)/Tb(III) = 2:3, 340 nm) were determined to gain the nearly white light emission. Meanwhile, compound 2 -Tb shows the high selectivity and sensitivity for Fe3+ cation via a luminescence quenching effect. In addition, the magnetic properties of 4 -Gd, 5 -Dy, 6 -Ho, 8 -Yb, 9 -Er were also measured. Abstract Three new series of lanthanide coordination polymers [LnL 2 (H 2 O) 4 ] n ·nNO 3 (Ln = Eu (1), Tb (2), Sm (3), Gd (4), Dy (5), Ho (6), Nd (7)), [LnL 2 (H 2 O) 4 ] n ·nCl (Ln = Yb (8), Er (9), and [LnL(H 2 O) 2 (NO 3) 2 ] n (Ln = Sm (10), Nd (11)) assembled through an asymmetrical N-heterocyclic rigid carboxylate ligand (HL) were solvothermally constructed. Compounds 1 – 7 , 8 , 9 and 10 , 11 display three diverse series of isomorphic 1D chain structures. Furthermore, the thermal stabilities and photoluminescence properties of these compounds were also studied. Based on a view that the emissions of 1 -Eu and 2 -Tb are composed of the three primary colors and they are isostructural, we prepared a series of doped [Eu x Tb (1-x) L 2 (H 2 O) 4 ] n ·nNO 3 compounds with different doping molar ratios. And the Eu(III)/Tb(III) molar ratio and the excitation wavelengh ([Eu(III)/Tb(III)] = 2:3, 340 nm) were determined to gain the nearly white light emission. Meanwhile, the magnetic properties of 4 -Gd, 5 -Dy, 6 -Ho, 8 -Yb, 9 -Er were also measured. [ABSTRACT FROM AUTHOR]

• Two novel copper(II) coordination polymers were synthesized. • Complex 1 is a 2D layer based on [Cu 2 (COO) 4 ] SBUs with a kgd topological network. • Complex 2 shows a 3D supramolecular structure with a single-node SP 2-periodic net (6,3)Id topology. • Magnetic studies show that complex 2 exhibits antiferromagnetic behavior. Two novel Cu(II) coordination polymers, namely, [Cu 2 (HL1) 2 ] n ·2nCH 3 CN·nH 2 O (1) , [Cu(HL2)(H 2 O)] n (2) , were solvothermally synthesized by isomeric N-heterocyclic multicarboxylate ligands (H 3 L1= 5-(3,4-dicarboxylphenoxy)nicotic acid, H 3 L2 = 5-(2,3-dicarboxylphenoxy)nicotic acid). Complex 1 possess the [Cu 2 (COO) 4 ] SBUs and displays a 2D kgd topological network with the point symbol of (43) 2 (46·66·83). Complex 2 shows a three-dimensional supramolecular structure with a single-node SP 2-periodic net (6,3)Id topology with a topological symbol of (42·64). Meanwhile, magnetic studies show that complex 2 exhibits antiferromagnetic behavior. Two new copper(II) coordination polymers show different structures. Complex 1 is a 2D layer based on [Cu 2 (COO) 4 ] SBUs with a kgd topological network. Complex 2 shows a 3D supramolecular structure with a single-node SP 2-periodic net (6,3)Id topology. These compounds present typical magnetic properties and good thermal stabilities. [Display omitted] [ABSTRACT FROM AUTHOR]

Four new cobalt(II) and manganese(II) coordination polymers show different structures. Compound 3 exhibits intriguing 2D layers based on [Co 3 (COO) 4 ] SBUs, while compounds 1 , 2 and 4 display 1D loop chain. These compounds present typical magnetic properties and good thermal stabilities. • Four novel cobalt(II) and manganese(II) coordination polymers were synthesized. • H 3 L1 in compounds 1 , 2 and H 3 L2 in compounds 3 , 4 show different coordination modes, respectively. • Compounds 1 , 2 and 4 exhibit display 1D loop chain. Compound 3 displays a 2D framework based on the [Co 3 (COO) 4 ] SBUs. • Magnetic studies show that compounds 1 , 3 and 4 exhibit antiferromagnetic behavior. Four novel coordination polymers, namely, [Co(L1)Cl(H 2 O)] n (1), [Mn(L1)Cl(H 2 O)] n · n H 2 O (2), [Co 3 (L2) 2 (H 2 O) 2 ] n · n CH 3 CN· n H 2 O (3), [Mn 3 (L2) 2 (H 2 O) 12 ] n ·1.5 n H 2 O (4) were solvothermally constructed by two N -heterocyclic carboxylate bifunctional ligands, 1-(4-carboxylphenyl)-3-(prazin-2-yl)-1H-1,2,4-triazole (HL1) and 5-(2,3-dicarboxylphenoxy)nicotic acid (H 3 L2). Compounds 1 , 2 and 4 exhibit 1D loop chain, and 3 displays a 2D framework based on the [Co 3 (COO) 4 ] SBUs with a (4,8)-connected new topology with the point symbol of (418·610)(45·6) 2. Magnetic studies show that compounds 1 , 3 and 4 exhibit antiferromagnetic behavior. [ABSTRACT FROM AUTHOR]

Two new Co(II)-complexes, namely, [(NH 2 Me 2) 2 ][Co 4 (L) 2 (μ 2 -O) 2 (H 2 O) 5 DMF]·2DMF·3H 2 O (1) , [(NH 2 Me 2) 5 ][Co 12 (L) 6 (μ 3 -O) 4 (HCOO)(H 2 O) 6 ]·2DMF·8H 2 O (2) were solvothermally constructed based on a rigid pyridine polycarboxylate ligand (H 4 L, 2,6-di(2′,5′-dicarboxyphenyl) pyridine). Complex 1 and 2 dislay 3D frameworks with various metal cluster. Complex 1 is a 3D porous framework with a (4,8)-connected topology featured by 1D pore structure in a-axis direction with binuclear cluster [Co 2 (COO) 4 O] and tetranuclear cluster [Co 4 (COO) 8 O 2 ]. Complex 2 possess trinuclear cluster [Co 3 (COO) 6 O] and binuclear cluster [Co 2 (COO) 5 O], and it can be clearly observed that 2 is assembled by numbers of nano-cages by twisting a certain angle. Notably, the gas sorption behaviour investigation indicates that the desolvated 1a displays uptake capacity and adsorption selectivity to C 2 H 2 and CO 2 over CH 4. Furthermore, the results of magnetic studies show that complex 2 exhibits antiferromagnetic interactions between Co2+ ions. Two new Co(II)-complexes, namely, [(NH 2 Me 2) 2 ][Co 4 (L) 2 (μ 2 -O) 2 (H 2 O) 5 DMF]·2DMF·3H 2 O (1) , [(NH 2 Me 2) 5 ][Co 12 (L) 6 (μ 3 -O) 4 (HCOO)(H 2 O) 6 ]·2DMF·8H 2 O (2) were solvothermally synthesized based on a rigid pyridine polycarboxylate ligand, 2,6-di(2′,5′-dicarboxyphenyl) pyridine. Dramatically, the gas sorption behaviour investigation manifests that the desolvated 1a displays higher uptake capacities for CO 2 and C 2 H 2 and high selectivity for C 2 H 2 and CO 2 over CH 4. In addition, the results of magnetic property studies show that comple× 2 exhibits antiferromagnetic behavior. [Display omitted] • Two new complexes were constructed based on rigid pyridine polycarboxylate ligand. • Complexes 1 and 2 feature 3D porous frameworks. • The desolvated 1 a displays highly selective capture properties of C 2 H 2 and CO 2. • Complex 2 shows antiferromagnetic behavior. [ABSTRACT FROM AUTHOR]