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Abstract: Two novel lanthanide complexes, [Nd2(L)6(bipy)(H2O)]n (1) and [Sm2(L)6(bipy)(H2O)]n (2) (HL=3,5-bis(trifluoromethyl)benzoic acid, bipy=2,2′-bipyridine), have been solvothermal synthesized and characterized by single-crystal X-ray diffraction, infrared spectroscopy, element analyses and powder X-ray diffraction. Single-crystal X-ray diffraction measurements reveal that the crystal structures are isostructural, crystallizing in the orthorhombic space group P-1 and they consist of linear tetrameric Ln4 units which are connected through carboxylate of L ligands into a one-dimensional (1D) zigzag chain and spread into 2D supramolecular (4,4) sql net. Furthermore, magnetic studies reveal antiferromagnetic behavior for complex 1. The luminescent properties of 2 were also studied. [Copyright &y& Elsevier]

Abstract: Three new 3D transition metal coordination complexes, namely, [Co(Aze)(L)] (1), [Cu(Aze)(L)]2 (2) and [Cd(Aze)(L)]·3H2O (3) (Aze = azelaic acid, L = 1,4-bis (1-imidazolyl)-benzene) have been synthesized hydrothermally from the self-assembly of the transition metal ions (M2+) with flexible aliphatic dicarboxylate ligand (Aze) and the rigid bis(imidazole) ligand (L). All complexes display three-dimensional (3D) structures. Complex 1 shows a three-fold interpenetrating 4-connected dmp net. Complex 2 shows a noninterpenetrating 4-connected cds net. Complex 3 shows the pcu net built on 6-connected Cd2 units and particularly there exists weave-like water chains penetrating the channels of the pcu net along b direction. Furthermore, thermogravimetric studies of 1, 2 and 3, and photoluminescent property of 3 have also been investigated. [Copyright &y& Elsevier]

Abstract: Two chiral complexes, [Cu(L1)(L2)H2O]·3H2O (1) and [Ni(L1)(SCN)(H2O)2]·2H2O (2) (HL1=L-histidine, HL2=L-alanine), have been synthesized through slow evaporation of solvent and characterized by single-crystal X-ray diffraction, IR, powder X-ray diffraction, element analysis and circular dichroism measurements. Complexes 1 and 2 crystallize in the monoclinic system with chiral space group P21, respectively. Interestingly, magnetic and ferroelectric studies reveal that complexes 1 and 2 demonstrate ferromagnetic and ferroelectric properties. [Copyright &y& Elsevier]

Two acentric, i.e., noncentrosymmetric, mononuclear complexes, Co(5-ATZ)4Cl2, 1, and Cu(5-ATZ)4Cl2, 2, where 5-ATZ is the monodentate 5-amino-1-H-tetrazole ligand, have been prepared and characterized. Both complexes crystallize in the tetragonal system with the P4nc space group, a member of the polar noncentrosymmetric 4mm class, and thus both 1 and 2 can exhibit ferroelectric and nonlinear optical properties. Magnetic studies indicate that 1 is a paramagnetic high-spin cobalt(II) complex with a rather extensive spin-orbit coupling, modeled as a zero-field splitting parameter, D, of ±91(3) cm-1 and with very weak long-range antiferromagnetic exchange interactions. Direct current (dc) and ac magnetic studies indicate that 2 is a paramagnetic copper(II) complex that exhibits weak ferromagnetic exchange interactions below 15 K. Both 1 and 2 exhibit ferroelectric hysteresis loops at room temperature with remanent polarizations of 0.015 μC/cm2 and coercive electric fields of 5.5 and 5.7 kV/cm, respectively. [ABSTRACT FROM AUTHOR]

Abstract: Three new complexes, namely, [M(Pim)(L)] (M=Co (1), Cd (2), Pim=Pimelic acid, L=1,4-bis(1-imidazolyl)-benzene), [Zn(Pim)(L)]·H2O (3), have been synthesized hydrothermally from the self-assembly of the transtion metal ions (M2+) with flexible aliphatic dicarboxylate ligand (Pim) and the rigid bis(imidazole) ligand(L). Both complexes 1 and 2 consist of left- and right-handed single-helical chains and present a two-dimensional (2D) layer with 36-hxl topology. Complex 3 displays a 2D structure constructed by right-handed single-helical chains and left-handed double-helical chains with intercrossed arrangement. Furthermore, thermogravimetric analyses for 1–3 and the photoluminescent properties of 2 and 3 have also been studied. [Copyright &y& Elsevier]

Abstract: A novel chiral copper-based complex constructed from chiral ligand, namely [Cu(L)(H2O)]·H2O (1) (L=(S)-3-phenyl-2-(pyrazine-2-carboxamido) propanoic acid). Complex 1 was prepared through solvothermal reactions and characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in the tetragonal system with non-centrosymmetric polar space group P43 and affords one-dimensional (1D) chiral helical chain. Ferroelectric and magnetic studies reveal that 1 shows both ferroelectric and weak ferromagnetic properties. [Copyright &y& Elsevier]

Abstract: Two new coordination complexes, {[Co3(nip)2(ina)2(H2O)2]·4H2O}n (1) and {[Mn3(nip)2(ina)2]}n (2) (nip=5-nitroisophthalic acid, ina=isonicotinic acid), have been hydrothermally synthesized from mixed rigid ligands. Complex 1 consists of linear trimeric Co3 units which are connected through double bridges into a two-dimensional (2D) (4,4) sql net. While for complex 2, the metal Mn centers are connected into infinite {⋯Mn2⋯Mn2⋯Mn1⋯}n chains which are bridged by nip and ina ligands into a 3D structure with pcu topology. Magnetic properties of the two complexes have also been studied, complex 1 displays ferromagnetic interaction between intracluster Co(II) ions, and complex 2 shows antiferromagnetic behavior. [Copyright &y& Elsevier]

Abstract: The objective of this paper is to describe an unusual coordination polymer, M4(μ4-O)(bipy)(m-BDC)3 (sM4 =Zn2.36 Co1.64, bipy=4,4′-bipyridine, m-H2BDC=1,3-benzenedicarboxylic acid) (1), which has been hydrothermally synthesised and characterized by single-crystal X-ray diffraction, XRPD, IR, TGA, ICP, atomic absorption, and element analysis. 1 crystallizes in the P42/mnm space group and contains a M4O(O2C)6 secondary building unit (SBU) with an inclined interpenetrated (4,4) topology, and is a rare combination of the two most successful approaches to coordination polymer design: generation of metal carboxylate SBUs and the use of pyridyl donor bridges. Moreover, complex 1 exhibits intense fluorescence at about 424nm (λ ex =312nm) in the solid state. [Copyright &y& Elsevier]

Abstract: One 3D noninterpenetrating metallic-organic framework (MOF), namely M1.5(TMA)(4,4′-bpy)0.5(μ-OH2) 1 (M=Zn1.35Co0.15, H3TMA=benzene-1,3,5-tricarboxylic acid, 4,4′-bpy=4,4′-dipyridyl), showing unprecedented (3,4)-connected (8.102)2(4.84.10)2(42.82.102) topology, has been synthesized hydrothermally via the self-assemble of hybrid metal ions with polydentate O-donor H3TMA ligand and coligand of rigid bidentate N-donor 4,4′-bpy. [Copyright &y& Elsevier]

Abstract: The hydrothermal reaction of CoCl2·6H2O, 4,4′-(ethene-1,2-diyl)dibenzoic acid (H2L) and 1,3,5-tris(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene (titb) generates a new three-dimensional (3D) coordination polymer [Co(titb)(L)]·3H2O (1). Compound 1 crystallizes in a noncentrosymmetric Cc space group and the topology analysis suggests it features a rare binodal (3,5)-connected (63)(69·8) hms net with 2-fold interpenetration, constructed by the 2D Co(titb)2+ sheet pillared by L ligands via coordination to the Co atoms. Furthermore, the thermal and ferroelectric properties of 1 have also been studied. [Copyright &y& Elsevier]

In the title complex, [Cu(C7H4ClO2)2(C10H8N2)] n, the CuII ion, lying on an inversion centre, is coordinated by two monodentate 4-chloro­benzoate ligands and two N atoms from two bridging 4,4′-bipyridine ligands, each disposed about a centre of inversion, within an N2O2 square plane. This coordination leads to the formation of a linear chain. [ABSTRACT FROM AUTHOR]

Under hydrothermal conditions, a new polynuclear Cu(II) complex, [Cu 2 (nip)(ina)( μ 3 -OH)] 2 ·H 2 O ( 1 ) (H 2 nip = 5-nitroisophthalic acid, Hina = isonicotinic acid) has been synthesized with mixed organic ligands. Single crystal X-ray analysis reveals that complex 1 displays a three-dimensional (3D) structure based on the tetranuclear Cu 4 units. In the structure of 1 , two pairs of symmetry-related Cu(II) ions are connected by six carboxyl and two μ 3 -OH groups to generate the tetranuclear Cu 4 units, which are connected by the mixed ligands into a 3D framework. Topology analysis reveals a (3,8)-connected tfz-d net for 1 . Magnetic studies display antiferromagnetic behavior for 1 . And thermogravimetric analysis of 1 has also been investigated. [ABSTRACT FROM AUTHOR]

Abstract: The hydrothermal reaction of CdCl2·2.5H2O with 3,5-bis-oxyacetate-benzoic acid (H3BOABA) and 4,4′-bis(1-imidazolyl)biphenyl (L) generates a new three-dimensional (3D) coordination polymer, {[Cd2(BOABA)(L)(μ 3-OH)]2·3H2O}n (1). In 1, the Cd(II) centers are connected by carboxylate and μ 3-OH bridges into Cd-O-C rod-like secondary building units (SBUs) which are further linked by BOABA3− and L ligands into the 3D framework. Two types of irregular rhombic channels occupied by free water molecules were observed in the framework. And the topology analysis suggests an unusual (4,8)-connected net for 1. Furthermore, the thermal and photoluminescent properties of 1 have also been studied. [Copyright &y& Elsevier]