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In this article, it has used four rigid bidentate N-donor ligands (phen = phenanthroline, 2,2′-bipy = 2,2′-bipyridine, 4,4′-bipy = 4,4′-bipyridine, bpe = 1,2-bis(4-pyridyl)ethene) reacted with the Cd(II) ions and flexible ligand 4,4′-((5-carboxy-1,3-phenylene)bis(oxy))dibenzoic acid (H 3 cpbda), and successfully synthesized five complexes with different dimensions and luminescence properties. In addition to the “T” and “Y” shaped molecular configurations of H 3 cpbda, the “M” shaped molecular configuration is found for the first time. Three types of molecular configurations act various roles to assemble different dimensional structures. Furthermore, the influence of two different kinds of rigid bidentate N-donor ligands on dimensions and luminescence properties has been studied. [ABSTRACT FROM AUTHOR]

Abstract: Reaction of disulfide-containing ligand 6,6′-dithiodinicotinic acid (H2cpds) with lanthanide metal salts led to three compounds {[Ln2(cpds)3(H2O)5]·7H2O} n (Ln=Gd, 1; Tb, 2; Er, 3) under hydrothermal conditions. The single-crystal X-ray diffraction analysis revealed that complexes 1–3 are isostructural. Two eight-coordinated metal centers are connected with carboxylate groups of H2cpds to give a binuclear [Ln2(CO2)4] unit. H2cpds discloses two independent binding modes resulting in the two types of 1-D chains by the connection of [Ln2(CO2)4] unit. Finally, the 1-D chains are linked by H2cpds to construct a 3-D network with an uncommon twofold interpenetrating 4-connected CdSO4 structure type (65,8 topology). It is worth noting that polyrotaxane-like motif is also exhibited in the 3-D network. The Tb(III) compound exhibits strong green photoluminescence in the visible region. Furthermore, the magnetic property of the Gd(III) compound has been investigated in the temperature range of 2–300K. The thermal behaviors and XPRD patterns of three compounds have also been discussed. [ABSTRACT FROM AUTHOR]

Abstract: Six new coordination polymers based on V-shaped linkage 2,5-bis(4-pyridyl)-1,3,4-thiadiazole (bpt) and transition metal ions, [Co(bpt)(pm)0.5(H2O)] n ·3nH2O (1), [Cu2(bpt)(pm)(H2O)4] n (2), [Co(bpt)(pydc)] n ·2nCHCl3 · nH2O (3), [Cu2(bpt)(pydc)2(H2O)2] n (4), [Cu2(bpt)(pydco)2(H2O)2] n · nH2O (5) and [Cd(bpt)(pydco)] n (6) (H4pm=pyromellitic acid, H2pydc=pyridine-2,6-dicarboxylic acid, H2pydco=pyridine-2,6-dicarboxylic acid N-oxide), have been synthesized under the intervention of various polycarboxylate ligands. Complex 1 exhibits a 3-D 4-connected structure with 1-D nanosized open channels encapsulated lots of water molecules. Complex 2 represents a 2-D grid containing two types of rectangular windows. When pydc and pydco instead of pm, complexes 3 and 6 were obtained with highly undulated 2-D layers. The interlayers of 3 are filled with two kinds of solvent molecules, whereas 6 is a double-layered framework without free molecules. Complexes 4 and 5 consist of two distinct 1-D infinite chains held together to form different 2-D supramolecular networks. Importantly, bpt spacer shows changeful conformational geometries and generates complicated crystalline architectures with the introduction of polycarboxylate ligands. Additionally, thermal stability of complexes 1, 3 and 5, fluorescent properties of 6 and X-ray powder diffraction of 1 have also been investigated. [Copyright &y& Elsevier]

Abstract: Four new coordination networks based on dipyridyl linkages 2,6-(N,N′-di(4-pyridyl)amino)pyridine (dpap) or 1,3-bis(4-pyridyl)propane (bpp) and different dicarboxylates have been synthesized and structurally characterized. Using dpap to react with two different dicarboxylates, maleic acid (H2mal) and 4,4′-sulfonyldibenzoate (H2sdba), respectively, two different two-dimensional (2D) coordination polymers of Cd(II), [Cd(dpap)(mal)] n (1) and {[Cd(dpap)(sdba)]·2H2O} n (2) were obtained. Compound 1 features a 42-membered bimetallic macrocyclic structural motif which is extended by mal groups to form a 2D network. In the case of 2, two different layers can be achieved depending on the conformation of sdba. The layer has a (8210) net topology with Cd as nodes and dpap, sdba bridges as the connectors. The overall structure of {[Mn(dpap)(sdba)]·1.5H2O} n (3) similar to that of 2 despite the presence of different metal ions. When dpap was replaced by bpp to react with Co(NO3)2 ·6H2O, another 1D coordination polymer, {[Co(bpp)(H2O)4]·sdba} n (4) was constructed. The 1D chains join sdba to make an overall 3D supramolecular architecture by hydrogen-bonding interactions ( (22), (12)). The Cd coordination polymers exhibit strong solid-state luminescence emission at room temperature. Thermal stability of these crystalline materials has been explored by thermogravimetric analysis of mass loss. [Copyright &y& Elsevier]

Abstract: The combination of transition metal ions with mixed ligands resulted in the formation of three new coordination polymers, {[Co(C4H4O5)(bpe)(H2O)2]·(0.5bpe)(H2O)} n (1), {[Cu(C4H4O6)(bipy)]·5H2O} n (2) and {[Cu(C4H4O5)(bpa)]·2.5H2O} n (3) (, , bpe=1,2-bis(4-pyridyl)ethene, bipy=2,2′-bipyridine, bpa=1,2-bis(4-pyridyl)ethane), which were prepared under solvothermal conditions and characterized by single-crystal X-ray diffraction. 1 and 2 feature 1D chain structures. Interestingly, each pair of chains recognizes each other through aromatic π–π stacking interactions, generating a zipper-like double-stranded chain in 2. Compound 3 shows 2D 63 topology framework with a rectangle-like grid. [Copyright &y& Elsevier]

Abstract: Three new iron(III) citrate complexes [Fe2(cit)2(H2O)2](H2bpa) (1), [Fe2(cit)2(H2O)2](H2bpe) (2) and [Fe4(cit)4(H2O)4](H2bpp)2(H2O) (3) (cit=C(O−)(COO−)(CH2COO−)2, bpa=1,3-bis(4-pyridyl)ethane, bpe=1,3-bis(4-pyridyl)ethene, bpp=1,3-bis(4-pyridyl)propane) were synthesized and characterized by elemental analysis, spectroscopic techniques and magnetic properties. Single X-ray diffraction analyses in the 1–3 complexes reveal that the iron ion is six-coordinated and is bound by two deprotonated citrates and a pair of aqua ligands in a distorted octahedral fashion. The anionic complex contains a centro-symmetrical planar of four-membered Fe2O2 ring. There are significant contributions to the stabilities of the assembled lattices in 1–3 arising from the protonated pyridine analogue counterions neutralizing the anionic charges of the complexes. The units in the complexes are connected together via hydrogen bonding to form 3D supramolecular networks. The supramolecular structures of 1–2 show alternating and motif linking the anionic moieties which are in turn interwoven with cationic moieties, while 3 shows alternating and motif. The magnetic properties of 1–3 are investigated and discussed in detail. [Copyright &y& Elsevier]

Abstract: Two 1D coordination polymers, [Cu(mal)(Hdpa)] n (1) and {[Cu(mal)(tpy)]·4H2O} n (2) (mal=maleate, Hdpa=2, 2′-dipyridylamine and tpy=2,2′:6′,2″-terpyridine), have been synthesized and their crystal structures, IR spectra, thermal analyses, magnetic properties were determined. In 1 and 2, the maleate ligands link adjacent metal centers to form 1D coordination polymeric chains. Furthermore, the carboxylate oxygen atoms and the aromatic chelate ligands provide potential supramolecular recognition sites for noncovalent interactions to form higher dimensionality. In 1, each pair of 1D chains recognize each other through strong hydrogen bond formed by active amine (–NH–) hydrogen and aromatic π–π stacking interactions to generate a zipperlike double-stranded chain. In contrast, when the substitutions of tpy for dpa further enhance the π–π aromatic stacking interactions, complex 2 is directly constructed into 2D zipperlike layers by the unprecedented aromatic π–π stacking interactions that same orientated aromatic chelate ligands are simultaneously attached to both sides of the chain and the significant C–H⋯O hydrogen bonds. These layers are constructed through hydrogen bonds and result in a 3D supramolecular network with 1D open channels, in which exists an unprecedented one-dimensional water chain. Both were magnetically characterized, showing weak ferromagnetic behavior. [Copyright &y& Elsevier]

Abstract: By regulating the pH values, two new zinc(II) coordination polymers, formulated as [Zn4(μ7 -CTAI)(μ3 -OH)(μ2 -OH)3(H2O)2] n ·2n(H2O) (1), [Zn2(μ7 -CTAII)(H2O)3] n (2) have been prepared by a flexible ligand, cyclohexane-1,2,4,5-tetracarboxylic acid (H4CTA) under hydrothermal conditions. Complex 1 exhibits a two-dimensional binodal (3,6)-connected topological network containing rare octanuclear zinc(II) clusters as the secondary building units (SBU1). Complex 2 displays a three-dimensional binodal (4,8)-connected topological network containing unusual Zn4(COO)6 secondary building units (SBU2). And importantly, the conformation of H4CTA in 1 exhibits (a,e,e,a) fashion and transforms to thermodynamically more stable conformation (e,a,e,e) type in 2 by pH-controlled. In addition, both of the complexes show strong photoluminescence at room temperature, and may be good candidates for potential luminescence materials. [Copyright &y& Elsevier]

Abstract: Two new salts based on heterocyclic organic cations and uranyl triacetate anion were obtained via reaction of zinc uranyl acetate with 2-substituted imidazoles in presence of an excess of acetic acid. Uranyl triacetate anion in [2-MeImH]+ [UO2(CH3COO)3]− and [2-PhImH]+ [UO2(CH3COO)3]− H2O has an expected bipyramidal structure with linear uranyl group and three acetate groups laying in equatorial plane. [2-MeImH]+ [UO2(CH3COO)3]− structure analysis reveals H-bonded 1D chains connected through N–H···O hydrogen bonds. 2-phenylimidazolium in [2-PhImH]+ [UO2(CH3COO)3]− H2O demonstrate planar geometry without any rotation of its rings, which was not registered before. H-bonds and π–π interactions of phenyl groups in this system lead to complicate 2D “sandwich” layer formation. The main features of IR- and luminescence spectrum of both compounds are also discussed. [Copyright &y& Elsevier]

Abstract: This work presents a systematic investigation on coordination chemistry of a novel pyridine-2,6-dicarboxylic acid N-oxide (pydco), and also reveals the significant function of supramolecular interactions in dominating the resultant crystalline nets. Assemblies of pydco with transition-metal ions under similar conditions yield a series of polymers in the absence/presence of the organonitrogen ligands {[Cu(pydco)(L)0.5(H2O)]·2H2O} n (L=bipy (1), bpa (2) and bpe (3)), {[M(pydco)(bpp)(H2O)]·2H2O} n (M=Cu (4) and Ni (5)), [Ag2(pydco)] n (6) and [Ag2Cu(pydco)2] n (7) (bipy=4,4′-bipyridine, bpa=1,2-bis(4-pyridyl)ethane, bpe=1,2-bis(4-pyridyl)ethene, bpp=1,3–bis(4-pyridyl)propane). 1–5 feature different structural characteristics, although they exhibit analogous chain networks. Remarkably, extended architectures are further constructed with the aid of weak interactions. Reaction of pydco with AgAc yields a 2-D polymer 6, which was reported in our recent Communication. A mixed-metal coordination polymer 7 was obtained by the self-assembly of AgAc, Cu(Ac)2 ·H2O and pydco. In 7, two left- and right-hand helical chains are constructed by carboxylic groups of pydco and Cu centers, which are further connected by [AgCO2]2 cores into a 2-D network. Structural evolution under the co-ligand intervention in this series of compounds, as well as the general coordination rule of pydco, has been further discussed. Furthermore, variable temperature magnetic properties of 1, 3 and 7 are also studied. The magnetic measurements of 1 and 3 reveal the existence of weak antiferromagnetic interactions with J 1 =−4.59cm−1 and J 2 =−4.63cm−1, respectively. Whereas 7 displays weak ferromagnetic interactions with J 3 =1.81cm−1. [Copyright &y& Elsevier]

From the same starting materials, two novel metal–organic frameworks, namely {(cation)[Cu 4 (bptca) 2 (OH)(H 2 O) 2 ]· x (solvent)} n ( 1 ) and {(cation)[Cu 3 (bptca) 2 (H 2 O) 3 ]· y (solvent)} n ( 2 ) (H 4 bptca = biphenyl-2,3,3′,5′-tetracarboxylic acid), have been synthesized through the linkage of Cu 2 (COO) 4 paddle-wheel clusters. The complex 1 possesses both dinuclear [Cu 2 O 2 ] subunits encapsulated into cage-like units and tetranuclear [Cu 4 ( μ 3 -OH) 2 ] clusters, which exhibits an unusual 3D 4-nodal (4,4,4,8)-connected network with {4 12 .8 12 .10 4 }{4 3 .8 3 } 4 {4 6 }{8 6 } topology. Reducing the metal-to-ligand ratio, the other 3D (4,4)-connected framework 2 with {4 2 .8 4 } PtS-type topology was constructed under the intervention of mononuclear Cu(bptca) 2 and single Cu 2 (COO) 4 paddle-wheel supporting layers. Notably, both of the frameworks 1 and 2 accommodate infinite open 1D nanosized quadrate channels. [ABSTRACT FROM AUTHOR]

Four coordination complexes based on (1,1′,2′1″-terphenyl)-4,4′4″,5′-tetracarboxylic acid (H4ttac), {[Co2(H2ttac)2(H2O)5]·(H2O)10} n (1), [Co2(ttac)(pyridine)(H2O)3] n (2), {[Co2(ttac)(4,4′-bipy)1.5(H2O)]·(H2O)} n (3), and {[Co3(ttac)2(bpe)3(H2O)2]·(H2O)6} n (4), (bpe=1,2-bis(4-pyridyl)ethene, 4,4′-bipy=4,4′-bipyridine), have been hydrothermally synthesized and structure characterization. Complex 1 exhibits a one-dimension chain with a cavity of 12.75×12.84Å2, and further stacks into a 3D framework through hydrogen bonds. 2 forms a (4,6)-connected 2D layer with the symbol of (32.42.5.6)2(32.46.52.64.7). 3 Is a 3D (4,4,4,5)-connected framework with the Schlafli symbol of (42.6.82.10)2(42.63.85)2(62.83.12)2. 4 displays a 2D double-layered grid with trinuclear units to construct a (4,4,6)-connected net marking the symbol of (4.84.12)2(43.62.8)2(44.62.88.12). The study on dihedral angles between the two monocarboxylic benzene rings in H4ttac ligands in complexes 1–4 shows that the change of dihedral angles from 62.85°, 66.24°, 56.41° to 59.69° mainly originated from the coordination numbers of their monocarboxylic groups from 3, 4, 2 to less than 2. Temperature-dependent magnetism susceptibility measurements show a ferromagnetic behavior for complex 4 and antiferromagnetic characters for complexes 1–3. [ABSTRACT FROM AUTHOR]

Highlights: [•] Four Zn(II) complexes have been synthesized via mixed ligands strategy. [•] All of them contain meso-helical chain constructed by metal center and bib ligand. [•] Luminescent spectra have been also investigated. [Copyright &y& Elsevier]

Three new coordination complexes, namely [Cd(HL)(μ-bpp)(H2O)]n·(H2O)n (1), [Co(HL)(μ-bpp)]n·(H2O)n (2), and [Ag2(L)2/3(μ-bpp)]n (3) [H3L=3-(4-carboxyphenoxy)phthalic acid and bpp=1,3-bis(4-pyridyl)propane], have been successfully synthesized by using H3L and accessory bridging ligand. The predominant influence in 1–3 may be the nature of different metal ions, which result in the complexes assembling into supramolecular frameworks with different topological nets. Structural analysis reveals that the structure of 1 can be described as a 2D network with Point (Schälfli) symbol for net: {66} topology. Complex 2 shows the similar 2D 44 grid-like layers by the intermolecular hydrogen bonds, whereas dinuclear Ag(I) clusters in 3 act as coordination nodes, forming a sandwich-like 2D structure. In addition, the magnetic behavior of 2 was also studied. [ABSTRACT FROM AUTHOR]

Abstract: Five novel transition metal (Zn, Cd, Mn and Co)-based coordination polymers 1–5 with a flexible rodlike N,N′-donor ligand (bbi=1,1′-(1,4-butanediyl)bis(imidazole))and four O-donor polycarboxylate anions (H2oxa=oxalic acid; H2fma=fumaric acid; H2bpdc=2,2′-biphenyldicarboxylic acid; H4cit=citric acid) have been successfully synthesized and characterized by elemental analysis, IR spectra, and X-ray diffraction, namely {[Zn(bbi)3(NO3)]Br·2H2O} n (1), [Zn(oxa)(bbi)] n (2), [Mn(fma)2(bbi)2(H2O)2] n (3), [Cd2(bpdc)2(bbi)2] n (4) and {[Co8(cit)4(bbi)6(H2O)10]·7H2O} n (5). Compounds 1–5 display various coordination motifs due to different conformations of the bbi ligand, at the same time, owing to diverse coordination modes of the polycarboxylate ligands. And the effect of the polycarboxylate ligands plays important roles in the construction of extended networks. Compounds 1, 2 and 5 all exhibit 2D layer structures, in which 1 displays a 3-fold interpenetration framework containing 2D networks with (6,3) topology and 2 is a 2D structure with (4,4) topology. Compound 5 contains a 2D 44 grid-like layer with (44·62) topology composed of octanuclear cobalt clusters. Two high-dimensional compounds (3D) with a microporous network, containing 1D flower-like metal–organic motifs interlinked by bbi ligands for 4 and a 3-fold interpenetrating network with 66-dia topology by considering the manganese ion as a four-connected node for 3, are observed. The biological activities of the title compounds have been studied. The results indicate that 1–5 exhibit certain selective antimicrobial activities against Escherichia coli, Staphylococcus aureus and Enterobacter aerogenes, besides, 5 exhibits more obvious radical-scavenging activities than that of bbi ligand. Furthermore, Solid-state properties of thermal stability and the photoluminescence properties at room temperature for these crystalline materials have also been investigated. [Copyright &y& Elsevier]

Abstract: Four Ag(I)/Co(II) complexes based on a flexible V-shaped ligand 3,3′, 4,4′-diphenylsulfone tetracarboxylic acid (H4dstc), namely [Ag(bpe)2]·H3dstc (1), {[Ag2(H2dstc)(bpp)(H2O)]·H2O} n (2), {[Co2(dstc)(bpe)2(H2O)2]·2H2O} n (3) and {[Co4(dstc)2(bpa)3(H2O)6]·7H2O} n (4) have been synthesized in the presence of different rod-like N-donor ligands 1,2-di(4-pyridyl)ethylene (bpe), 1,3-bis(4-pyridyl)propane (bpp), and 1,2-bis(4-pyridyl)ethane (bpa). In complex 1, the H3dstc– ligand does not take part in coordination but balances the charge by its one deprotonated carboxylate group. Complex 2 contains two different motifs: a cationic 1D chain [Ag(bpp)]+ and an anionic 1D meso-helix [Ag(H2dstc)(H2O)]–. Interestingly, the non-covalent hydrogen bonding interactions extend such simple discrete units or 1D chains into 3D supramolecular architectures. Complex 3 represents a 3D binodal 4-connected (64·82) network, while complex 4 can be simplified as a primitive cubic (pcu) network. In addition, the photoluminescence of 1 and 2 and the magnetism of 3 and 4 are investigated, respectively. [Copyright &y& Elsevier]

Abstract: Three ZnII/CdII-coordination polymers based on 2-propyl-4,5-imidazoledicarboxylate (H3pimdc), namely, [Zn(Hpimdc)H2O] n (1), [Cd(H2pimdc)2] n (2) and [Cd2(Hpimdc)2(bbi)0.5(H2O)2] n [bbi=1,10-(1,4-butanediyl)bis(imidazole)] (3), have hydrothermally been synthesized, which exhibit a systematic dimensional variation by changing the metal ions or introducing the auxiliary ligand. Complex 1 is a 1D zig-zag polymeric chain, which is finally extended into a 3D supramolecular network through (12) O–H⋯O H-bonding rings. Complex 2 shows a 2D layer comprised alternately arranged left- and right-handed helical chains. Complex 3 features a rare (3,3)-connected 83 network with opposite chiral layers in a slipped ABAB fashion. The photoluminescent properties and thermal stabilities of three complexes are also discussed. [Copyright &y& Elsevier]

Abstract: Based on 1H-imidazo[4,5-f][1,10]-phenanthroline (IP), 4,4′-oxybis(benzoic acid) (H2oba), and two different metal salts, two novel complexes were hydrothermally constructed, {[Cd2(oba)2(IP)2(H2O)]·H2O} n (1) and {[Mn2(IP)4(oba)2]·(oba)(H2O)2} n (2). Complex 1 exhibits a rare 2D→2D parallel interpenetration layer , which contains two same-hand chiral sheets with the space group. Complex 2 contains 1D left-hand helical chain with the C2 space group. Meanwhile, the dissociate oba and water molecules are connected to be a right-hand helical chain via hydrogen bonds, and form a twofold-interpenetrating structure. In addition, the two compounds also exhibit good thermal stability. [Copyright &y& Elsevier]

Abstract: The self-assembly of a V-shaped ligand 3,3′,4,4′-diphenylsulfonetetracarboxylate (dstc) and metal salts in the presence of a series of N-donor ligands yielded four new complexes, namely, [Cu4(H2dstc)4(phen)4]·12H2O (1), {[Cu2(dstc)(bpe)(H2O)2]·4H2O} n (2), [Cu3(dstc)(bipy)(μ2-OH)2(H2O)2] n (3), {[Cd5(dstc)2(bipy)2(μ3-OH)2(H2O)4]·4H2O} n (4) (phen=1,10-phenanthroline; bpe=1,2-bis(4-pyridyl)ethene; bipy=4,4′-bipyridine). All the complexes were structurally determined by single-crystal X-ray diffraction and characterized by elemental analyses, IR spectra, X-ray powder diffraction and TG analyses. Complex 1 is a discrete tetranuclear unit, which further assembles into a 3D supramolecular framework by intermolecular hydrogen bonding interactions. Complex 2 is composed of 2D 44 grid-like layers based on dinuclear copper units. Complex 3 features a rare 3D (6,8)-connected topological net consisting of trimetallic clusters. 12-connected pentanuclear cadmium clusters are observed in complex 4 and the resulting structure shows an uncommon (4,12)-connected topology. The structural differences among 1–4 demonstrate that the nature of the N-donor assistant ligands and metal ions can play critical roles in the formation and structures of the resulting complexes. Magnetic studies showed antiferromagnetic interactions for 1 and 3. In addition, the luminescent property of 4 was also studied. [ABSTRACT FROM AUTHOR]

Abstract: The tartaric acid (H4L), serving as versatile tectons, link CuII atoms with three different bridging modes to form a unique double-bowed nanosized Cu10-assembly, namely, [CuII 10(H2L)4(HL)4]·(apy)8·13H2O (1) (apy=2-aminopyridine). Single-crystal analysis reveals that the nano-cluster is composed of two bow-shaped pentameric subunits joined together by carboxyl O bridges, in which eight CuII atoms are in distorted octahedral site, while the other two CuII atoms display the square-pyramidal geometries. Interestingly, such decanuclear SUBs are connected by (12) H-bonding rings into a 3D α-Po network. Magnetic studies show an antiferromagnetic interaction between CuII centers. [Copyright &y& Elsevier]

In the present study, three different substituted-polynitrogen heterocyclic ligands, Hatzpa (Hatzpa = 3-(5-Amino-tetrazol-1-yl)-propionic acid), Hpytzipa (Hpytzipa = 2-(5-Pyridin-3-yl-tetrazol-2-yl)-propionic acid), Hphtz (Hphtz = 4-(4-hydroxyphenyl)-1,2,4-triazole) have been chosen to react with CuCl 2 ·2H 2 O, resulting in the formation of three new compounds [Cu(atzpa) 2 ] (1), [Cu(pytzipa) 2 ] (2) and [Cu 4 (Hphtz) 8 ](ClO 4) 4 ·4H 2 O (3). Complex 1 displays a complex 2D structure; complex 2 shows a 2D layer network; complex 3 shows a tetranuclear Cu(II) structure. These compounds show considerable cytotoxicity towards human cervical cancer cells (HeLa). The MTT assay suggests that compound 2 with lowest half maximum inhibitory concentration (IC 50) is the most cytotoxic, compared with compounds 1 and 3. In addition, the cytotoxicity was also confirmed by DAPI fluorescent staining method. The migration of HeLa cells is inhibited by NPs of the three compounds. The results show that complex 1 – 3 NPs can inhibit cell proliferation and migration in vitro. [Display omitted] • Three new Cu(II) coordination polymers have been prepared, namely [Cu(atzpa) 2 ] (1), [Cu(pytzipa) 2 ] (2) and [Cu 4 (Hphtz) 8 ](ClO 4) 4 ·4H 2 O (3). • Complex 1 displays a complex 2D structure; complex 2 shows a 2D layer network; complex 3 shows a tetranuclear Cu(II) structure. • These compounds show considerable cytotoxicity towards human cervical cancer cells (HeLa). • The complexes 1 – 3 NPs can inhibit cell proliferation and migration in vitro. Three different substituted multi-nitrogen heterocyclic ligands, Hatzpa (Hatzpa = 3-(5-Amino-tetrazol-1-yl)-propionic acid), Hpytzipa (Hpytzipa = 2-(5-Pyridin-3-yl-tetrazol-2-yl)-propionic acid), Hphtz (Hphtz = 4-(4-hydroxyphenyl)-1,2,4-triazole) have been chosen to react with CuCl 2 ·2H 2 O, resulting in the formation of three new complexes [Cu(atzpa) 2 ] (1), [Cu(pytzipa) 2 ] (2) and [Cu 4 (Hphtz) 8 ](ClO 4) 4 ·4H 2 O (3). The coordination sites of the three ligands are mainly affected by the different substituents of the polynitrogen heterocycle. These complexes have been characterized by elemental analysis, IR and single crystal X-ray diffraction. Complex 1 displays a 2D structure; complex 2 shows a 2D layer network; complex 3 shows a tetranuclear Cu(II) structure. These complexes show considerable cytotoxicity towards human cervical cancer cells (HeLa). The MTT assay suggested that, compared with complexes 1 and 2, complex 3 with lowest half maximum inhibitory concentration (IC 50) is the most cytotoxic. In addition, the cytotoxicity was also confirmed by DAPI fluorescent staining method. The migration of HeLa cells is inhibited by NPs of the three complexes. The results showed that the NPs of complexes 1 – 3 can inhibit cell proliferation and migration in vitro. [ABSTRACT FROM AUTHOR]

• Four new solvent-regulated congenetic zinc(II)-based MOFs were synthesized solvothermally. • Some physico-chemical properties of the MOFs materials were characterized. • Various frameworks including 1D loop chains, 2D sql plane and 2D bilayered structure were created. • This approach for solvent-regulated strategy to allow the structural fine-tuning provides a good role model in reticular chemistry. Four new congenetic zinc(II) MOFs, namely [Zn 5 (bdcpp) 3 (DMF)(H 2 O) 4 ] n · x (solvent) (1), [Zn 2 (bdcpp)(Hbdcpp)] n · y (solvent) (2), [Zn 2 (bdcpp)(DMF)(H 2 O) 2 ] n (3), and [Zn 2 (bdcpp)(NMP)(H 2 O) 2 ] n (4) (H 4 bdcpp = 2,6-bis(2′,4′-dicarboxylphenyl)pyridine, DMF = N,N'-dimethyl formamide, NMP = N -methyl-2-pyrrolidone), have been synthesized solvothermally with different solvent systems. Stabilized by Zn 2 (COO) 4 paddle-wheel building blocks, the resulting MOFs 1 – 4 represent diverse structural features. Structurally, 1 is a rarely 3,4- c binodal 2D bilayered framework, 2 possesses a 4- c 2D (4,4) sql planar network accommodating two kinds of hetero chiral helix chains, 3 and 4 are isostructural 1D loop ladder chains except different solvent molecules occupying the axial terminals of Zn 2 (COO) 4 paddle-wheels. This approach based on solvent-regulated strategy aiming to allow the structural fine-tuning provides a good role model in reticular chemistry. Complexes 1 – 3 display excellent solid-state photoluminescence stemming from the metal-to-ligand charge transfer or intraligand charge transmission. [ABSTRACT FROM AUTHOR]

Seven new complexes based on the bifunctional ligand were synthesized under hydro(solvo)thermal conditions. 1 – 7 adopts different coordination modes and generates diverse 1D or 2D structures. • The L2−/HL− ligand in 1 – 7 adopts different coordination modes and generates diverse structures. • Compound 1 shows highly selective and sensitive response to Fe3+. • Compound 1 shows highly selective sensitivity for Cr2O 7 2− and MnO 4 2−. Seven new complexes based on 4-(3-carboxyl-1,2,4-1H-triazol-1-yl)benzoic acid (H 2 L), namely [Zn(L)(H 2 O) 2 ] n (1), [Cd(L)(H 2 O) 2 ] n (2), [Pb(HL) 2 ] n (3), [Pb(L)(H 2 O)] n (4), [Cu(L)(H 2 O) 2 ] n (5), [Co(L)(H 2 O) 2 ] n (6) and [Mn(L)(H 2 O) 2 ] n (7), were synthesized by employing different center metal ions and a imidazol-carboxyl bifunctional ligand (H 2 L) under hydro(solvo)thermal conditions. The L2−/HL− ligand in 1 – 7 adopts different coordination modes and generates diverse 1D or 2D structures. The luminescent and magnetic properties of seven complexes were investigated in detail. Moreover, complex 1 shows high selectivity for Fe3+, Cr 2 O 7 2− and MnO 4 − ions, indicating that 1 can be an excellent candidate for luminescence sensing. In addition, complexes 5 , 6 and 7 demonstrate antiferromagnetic interactions. [ABSTRACT FROM AUTHOR]