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• Micro-flaky gold particles were fabricated by directly chemical reducing method. • The flaky gold powder can improve the joining between the spherical gold powder. • Conductivity and sintering density of gold paste was improved remarkably. In this study, the gold precursors were rapidly reduced by hydroxy compound and micron-sized flaky gold powder was obtained under hydrothermal conditions. Isopropyl alcohol was selected as solvent and reducing agent after investigating the effect of reducing agent on the morphology of the gold powder. The influence of reaction concentration and temperature on the particle size and morphology of gold powder were researched. By controlling the reaction concentration and temperature, the prepared gold particles have regular flaky structure with the diameter of about 5 μm and the sintered gold conductor paste shows excellent conductivity and sintering density. [ABSTRACT FROM AUTHOR]

Abstract Two novel bipyridinium-based metal–organic frameworks Zn[(pbpy) 0.5 (m-BDC)Cl]·1.5H 2 O(1) and Cd[(pbpy) 0.5 (m-BDC)Cl]·H 2 O(2).(pbpycl 2 = 1,1′-[1,4-phenylenebis-(methylene)]bis(4,4′-bipyridinium)–dichloride) have been synthesized and structurally characterized by single crystal X-ray crystallography. Both of them show 2D layered window structures. When they are irradiated by 300 W Xenon lamp, both of them exhibit photochromic behaviors which are attributed to the process of intermolecular electron transfer to generate pbpycl 2 free radicals. These processes have been demonstrated by UV–Vis absorption characterization analysis, electron spin resonance (ESR). The photoproduct of compound 1 is more stable than compound 2 in air. Photochromic mechanisms and the relationships between structures and properties have been discussed adequately. Graphical abstract Two cases of metal-controlled photosensitive bipyridinium-based metal-organic frameworks, these compounds exhibit reversible photochromic behaviors. Unlabelled Image Highlights • Two cases of novel MOFs have been synthesized. • These compounds exhibit photochromic properties. • They have different color fading time. [ABSTRACT FROM AUTHOR]

LiMnCoNiO was synthesized by sol-gel method at 700, 800, 900 and 1000 °C, respectively, characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and measured as the cathode materials for lithium-ion batteries (LIBs). After their performances have been compared, 800 °C was considered as the optimum synthesis temperature for LiMnCoNiO as the cathode materials for LIBs. When charge-discharged at 20 mA g in a voltage window of 2.0-4.8 V, the LiMnCoNiO synthesized at 800 °C (LMNCO-800) showed charge and discharge capacities of 376.2 and 276.3 mAh g, respectively, with irreversible capacity of 99.9 mAh g and Coulombic efficiency of 73.4%, in the first charge-discharge cycle. The discharge capacity was 239.0 mAh g in the 50th charge-discharge cycle, with capacity retention of 86.6%. The LMNCO-800 also showed superior high-rate performances. When cycled at the rates of 0.5, 1, 2 and 5 C rate (1 C = 200 mA g), the discharge capacities of the LiMnCoNiO can reach 241, 171, 150 and 110 mAh g, respectively. When characterized with high-resolution transmission electron microscopy (TEM), nanodomains with two different structures can be found in LMNCO-800, with some nanodomains showing monoclinic LiMnO structure and the other nanodomains showing hexagonal LiMO structure. [ABSTRACT FROM AUTHOR]

Seven new 3d–4f heterometallic coordination polymers, [Ln(CuL) 2 (Hbtca)(btca)(H 2 O)]·2H 2 O (Ln = Tb III 1 , Pr III 2 , Sm III 3 , Eu III 4 , Yb III 5 ), [Nd(NiL)(nip)(Rnip)]·0·25H 2 O·0.25CH 3 OH (R= 0.6CH 3 , 0.4H) 6 and [Nd 2 (NiL)(nip) 3 (H 2 O)]·2H 2 O 7 (CuL or NiL, H 2 L = 2, 3-dioxo-5, 6, 14, 15-dibenzo-1, 4, 8, 12-tetraazacyclo-pentadeca-7, 13-dien; H 2 btca = benzotriazole-5-carboxylic acid; H 2 nip = 5-nitroisophthalic acid) have been synthesized by a solvothermal method and characterized by single-crystal X-ray diffraction. Complexes 1–5 exhibit a double-strand meso-helical chain structures formed by [Ln III Cu II 2 ] units via the oxamide and benzotriazole-5-carboxylate bridges, while complex 6 exhibits a four-strand meso-helical chain formed by NdNi unit via the oxamide and 5-nitroisophthalate bridges. Complex 7 consists of a 2D layer framework formed by four-strand meso-helical chain via the nip 2− bridges. Moreover, the magnetic properties of them were investigated, and the best-fit analysis of χ M T versus T show that the anisotropic contribution of Ln(III) ions (arising from the spin-orbit coupling or the crystal field perturbation) dominates (weak exchange limit) in these complexes(for 3 , λ = 214.6 cm −1 , zj’ = −0.33 cm −1 , g av = 1.94; for 5 , Δ = 6.98 cm −1 , zj’ = 1.53 cm −1 , g av = 1.85). [ABSTRACT FROM AUTHOR]

Three two-dimensional coordination polymers {[Zn(H-3, 3-bpma)(1, 2,4-btc)] ·H2O} n ( 1), {[Cu2(H-3, 3-bpma)2(1, 2,4-btc)(H-1, 2,4-btc)(H2O)2] ·ClO4 ·7.75H2O} n ( 2), and {[Cd4(H-3, 3-bpma)2(1, 3,5-btc)3Cl(H2O)7] ·12.75H2O} n ( 3) [3, 3-bpma = N, N′-bis(3-pyridylmethyl)amine, H3-1, 2,4-btc = 1, 2,4-benzenetricarboxylic acid, and H3-1, 3,5-btc = 1, 3,5-benzenetricarboxylic acid] were synthesized and characterized by X-ray crystallography. The complexes are all two-dimensional layer networks with diverse topologies bridged by mixed flexible bis(pyridylmethyl)amine and auxiliary rigid aromatic multicarboxylate ligands. The H-3, 3-bpma ligands adopt different conformations, whereas the aromatic multicarboxylates show various binding modes in the complexes. The magnetic, photoluminescence and thermal properties for complexes 1 and 2 were investigated. [ABSTRACT FROM AUTHOR]

Two coordination polymers [Zn2(ipt)2(CuL)2(H2O)] ( 1) and [Zn2(ipt)2(NiL)2(H2O)] ( 2) ( ML, H2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien; H2ipt = isophthalic acid) were synthesized by solvothermal methods and characterized by single-crystal X-ray diffraction. Complexes 1 and 2 exhibit ladderlike chains, consisting of Zn4Cu4 and Zn4Ni4 units, respectively, which are connected via oxamide and isophthalate. These chains are further interlinked by hydrogen bonds resulting in a 2D supramolecular architecture. The fluorescence properties of compounds 1 and 2 are also discussed. [ABSTRACT FROM AUTHOR]

Abstract: Six new coordination polymers, [Co(NiL)(aipt)] (1), [Co2(ML)(hipt)2(CH3OH)(H2O)]·CH3OH (M=Cu (2), Ni (3)), [Co2(C2O4)2(CuL)2] (4), [Co4(NiL)4(ipt)4(H2O)2] (5) and [Co(CuL)(tpt)] (6) (H2L=2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien; H2aipt=5-aminoisophthalic acid; H2hipt=5-hydroxyisophthalic acid; H2ipt=isophthalic acid; H2tpt=terephthalic acid), have been synthesized by a solvothermal method and characterized by single-crystal X-ray diffraction. Complexes 1, 4 and 5 exhibit different infinite chain structures formed by CoNi (1), Co2Cu2 (4), Co4Ni4 (5) units, respectively, via oxamide and diverse carboxylate bridges, while complexes 2, 3 and 6 exhibit different two-dimensional network structures formed by Co2M or Co2M2 units via oxamide and 5-hydroxyisophthalate or terephthalate bridges. The results of magnetic determination show weak antiferromagnetic interactions in 1–3 and 5–6, and the spin–orbit coupling interaction of Co(II) is a primary factor in the magnetic behaviors. [Copyright &y& Elsevier]

Abstract: Three heterometallic coordination polymers [Gd2Cu(Hbidc)2(SO4)2(H2O)7]n (1), [Eu2Cu(Hbidc)2(SO4)2(H2O)7]n (2), and [Dy2Cu(Hbidc)2(SO4)2(H2O)7]n (3) (H3bidc=1H-benzimidazole-5,6-dicarboxylic acid) have been synthesized under hydrothermal conditions. They are characterized by elemental analysis (EA), infrared (IR) spectroscopy, thermogravimetric analysis (TGA), single crystal X-ray diffraction, and power X-ray diffraction (XRD). The results reveal that all complexes present almost identical three-dimensional (3D) PtS topology framework structures. The photoluminescent properties of 2 and 3 are investigated. [Copyright &y& Elsevier]

Three new lanthanide-organic coordination polymers, {[ Ln2(bpdc)2(H2O)6(NO3)] ·NO3} [ Ln = La ( 1), Ce ( 2), Pr ( 3)] (H2bpdc = 2, 2′-bipyridine-6, 6′-dicarboxylic acid) were synthesized under hydrothermal conditions and structurally characterized by elemental analysis, IR spectroscopy as well as single-crystal and powder X-ray diffraction. Single-crystal X-ray diffraction analysis revealed that compounds 1- 3 are isostructural, composed of two dimensional honeycomb network linked by bpdc ligands. The magnetic property of compound 3 was investigated. [ABSTRACT FROM AUTHOR]

A series of lanthanide-organic framework coordination polymers, {[La2(TDC)2(NO3)(H2O)4](OH)·5H2O}n(1) and [Ln(TDC)(NO3)(H2O)]n(TDC = thiophene- 2, 5- dicarboxylic acid; Ln = Nd(2), Sm(3), Eu(4), Gd(5), Tb(6), Dy(7), Ho(8), Er(9), Yb(10)) have been synthesized by solvothermal reaction and characterized by elemental analysis, FT-IR, TG analysis, single-crystal X-ray diffraction and power X-ray diffraction. The single-crystal X-ray diffraction analysis results show that 1displays a 3-D porous framework with (3,7)-connected {410.611}{43} topology. The compounds 2–10crystallized in the same P21/cspace group and exhibits a (3,6)-connected {4.62}2{42.610.83} topology, Right-handed and left-handed helical chains coexist in the 2-D layer structure. The luminescence properties of 2–10and the magnetic properties of 5,7,8,9were investigated. [ABSTRACT FROM AUTHOR]

Four complexes, [Ag4(bipy)2(Himdc)2(H2O)2]n (1), [Ag(H2imdc)]n (2), [K(H3imdc)(H2imdc)(H2O)2]n (3), and [Cu(Himc)2] (4) (H3imdc = 1H-imidazole-4,5-dicarboxylic acid, H2imc = 1H-imidazole-2-carboxylic acid, and bipy = 4,4'-bipyridine), were hydrothermally synthesized and characterized by single-crystal X-ray diffraction analysis and elemental analysis. The obtained complexes exhibit different coordination structures; 1 contains a 2-D supramolecular layer based on two chains arraying uniformly in an ABAB manner. Compound 2 displays sawtooth-shaped 1-D chains extending to 2-D layers via hydrogen bond interactions. Compound 3 possesses a 3-D framework structure based on a 1-D chain via hydrogen bonding interactions. Compound 4 has a 3-D framework structure bearing a pcu-type topology. In addition, the photoluminescence for 1 has been investigated. [ABSTRACT FROM AUTHOR]

Abstract: Three novel coordination polymers [(Eu2(Hbidc)2(ox)2·(H2O)3] (1), [Tb2(Hbidc)2(ox)(H2O)2]·4H2O (2), [Er2(Hbidc)2(ox)] (3) have been synthesized with hydrothermal reaction (H3bidc=Benzimidazole-5,6-dicarboxylic acid, H2ox=Oxalic acid) and characterized by elemental analysis, IR and X-ray single crystal diffraction. 1, 2 and 3 have the same crystal system of triclinic, but they exhibit different kinds of metal-organic framework structures. The luminescent properties of 1 and 2 were studied at room temperature. [Copyright &y& Elsevier]

Abstract: A novel 4d–4f heterometallic coordination polymer [EuAg(imdc)2] n (1) (imdc=imidazoledicarboxylate) has been hydrothermally synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. X-ray single-crystal structural analysis reveals that 1 is a three-dimensional framework. Furthermore, 1 also displayed photoluminescent properties in the red range at room temperature. [Copyright &y& Elsevier]

Two metal-nitroxide complexes, [Cu(IMPhenCOO)(CH3OH)]2 · (NO3)2 (1) and [Co(NIT2Py)(H-2,5-PDA)2] · 0.5CH3OH · 2H2O (2) (IMPhenCOOH = 2-carboxyl-9-(4,4,5,5-tetramethylimidazoline-1-oxyl-2-yl)-1,10-phenanthroline, NIT2Py = 2-(2'-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and H2-2,5-PDA = pyridine-2,5-dicarboxylic acid), have been synthesized and structurally characterized by X-ray diffraction. Complex 1 exists as discrete binuclear molecules and each copper(II) is five-coordinate with one tridentate radical ligand (IMPhenCOOH), the other radical ligand through one carboxyl oxygen and one methanol molecule. Complex 1 is the first structurally characterized complex containing the phenanthroline-substituted nitroxide radical. In 2, the Co(II) is six-coordinate with one radical ligand (NIT2Py) and two bidentate pyridine-2,5-dicarboxylate anions. [ABSTRACT FROM AUTHOR]

A novel, three-dimensional, tetrachlorophthalato-bridged samarium complex [Sm(tcph) 2 (H 2 O) 6 ]Hpip·5H 2 O ( 1 ) (tcph = tetrachlorophthalate dianion, pip = piperidine) has been synthesized and characterized by an X-ray structure determination. The title complex contains an unusual dimer formed by very short hydrogen bonds and gives a three-dimensional network by means of extensive hydrogen bonds. The fluorescence spectrum of 1 was measured. [ABSTRACT FROM AUTHOR]

A new oxamidato-bridged trinuclear complex [(CuL) 2 Mn](ClO 4 ) 2 (H 2 L = 2,3-dioxo-5,6,14,15-dibenzo-1,4, 8,12-tetraazacyclo-pentadeca-7,3-dien)] was prepared and its structure determined. The complex is monoclinic, space group P2 1 / n , with a = 10.625(3), b = 11.602(3), c = 16.020(5) Å, β = 91.031(5)°, Z = 2; it was refined to R 1 = 0.0555. In the solid state, the structure consists of centrosymmetric [(CuL) 2 Mn] 2+ cations separated by perchlorate anions; the central manganese atom is four coordinated with square planar geometry. [ABSTRACT FROM AUTHOR]

Abstract: It remains unclear how a cluster packing pattern affects the glass forming ability of bulk metallic glasses. The topological structures of Ti50Cu50 and Ti50Cu45Ni5 metallic glasses obtained by molecular dynamics simulations are compared to investigate the relation between the atomic structure and glass forming ability. The structural analysis shows that the addition of Ni in Ti50Cu50 alloy can significantly change the topological structure. Cluster distribution entropy is proposed to quantitatively descript the disordered degree of cluster distribution. It is shown that the cluster distribution entropy provides a statistical approach for assessing the microstructures of metallic glasses. [Copyright &y& Elsevier]

The newly designed butterfly-shaped hetero-tetranuclear CuII-NaI coordination compound, [Cu3(HL)2Na]∙Pic (Pic− is abbreviation of picrate) (1) which is derived from a naphthalenediol-based bis(Salamo)-type chelating ligand H4L have been synthesized and characterized by elemental analyses, UV-vis spectra, IR spectra analysis, and Hirshfeld surface analysis. X-ray crystallographic analyses revealed that the coordination compound 1 is a novel hetero-tetranuclear CuII-NaI bis(Salamo)-type coordination compound and it differs from heterotrinuclear CuII-NaI bis(Salamo)-type coordination compound reported earlier. The Cu1 and Cu3 atoms are tetra-coordinated with geometries of distorted square pyramid, while Cu2 atom are hexa-coordinated with the geometry of a distorted octahedron. The NaI atom is octa-coordinated with the geometry of a distorted hexagonal bipyramid. Furthermore, the supramolecular structure and Hirshfeld surface analyses have been discussed in detail. [ABSTRACT FROM AUTHOR]

A series of 3d-4f heterometallic coordination polymers (CPs), namely, Ln 2 (CuL) 2 (nipt) 3 (H 2 O)]⋅nH 2 O (Ln = Sm 1 , Nd 2 , Gd 3 , for 1 – 2 n = 2, for 3 n = 1.6), [Yb 2(CuL) 4 (nipt) 3 ]·3.5H 2 O (4), [Pr 2 (NiL)(nipt) 3 (H 2 O)]⋅1.5H 2 O (5), [Sm 2 (NiL)(nipt) 3 (H 2 O) 2 ]CH 3 OH⋅H 2 O (6), [Er 2 (NiL) 2 (nipt) 3 (H 2 O) 2 ]⋅3H 2 O (7) (ML, H 2 L = 2, 3-dioxo-5, 6, 14, 15-dibenzo-1, 4, 8, 12-tetraazacyclo-pentadeca-7, 13-dien; H 2 nipt = 5-nitroisophthalic acid) were obtained by a solvothermal method and structurally characterized. Complexes 1–3 have 3,3,4,5-connected (3.4.5)(32.42.5.63.72)(42.63.8)(42.6) topological structure consisting of two different chains. 4 exhibits a two-dimensional (2D) heterometallic structure with 3-connected (63) topology. 5 displays a 2D framework formed by four-strand meso-helical chains and characterized by 6,6,4,4,4-connected (411.64)(412.63)(43.62.8)(45.6) 2 topology. Compound 6 has 3,4,4,3-connected (43)(44.62)(42.124)(42.6) topological structure formed by three-strand meso-helical chains. In 7 , two kinds of μ 3 -bridged nipt2− ligands together with NiL connect the eight-coordinated Er3+ ions to form a 2D structure, and the 2D layers are extended by μ 2 -bridged nipt2− into a three-dimensional (3D) microporous framework with 4,4,3,3-connected (4.62.83) 2 (4.82) 2 topology. Interestingly, for 1 , 2 and 4 , CuL-sensitized the near-infrared emissions form Sm(III), Nd(III) and Yb(III) were firstly found under visible light irradiation. Moreover, the magnetic properties of 1 , 2 , 4 and 5 are also discussed. Image 1 [ABSTRACT FROM AUTHOR]

Four new isostructural coordination polymers, [M 2 (μ 2 -H 2 O)(DTBC) 2 ] (CTGU- 26(M), M ​= ​Zn, Cd, Co and Ni] have been prepared with a new butterfly-typed nitroheterocyclic 4,6-di- 1H-1,2,4-triazol-1-yi-1,3-benzenedicarboxylic acid(H 2 DTBC) ligand and metal salts under hydrothermal condition. CTGU-26(Zn) features an unusual 2-nodal (4, 8)-connected scu topological network generated by [Zn 2 (μ 2 -H 2 O)(COO) 4 ] units and DTBC2− anion linkers. Luminescent properties measurements indicate that both CTGU-26(Zn) and CTGU-26(Cd) show intense fluorescence-emission compared with free H 2 DTBC ligand in solid state. Moreover, the electrocatalytic activities of CTGU-26(Co) and CTGU-26(Ni) towards methanol oxidation reaction (MOR) of two compounds were also investigated. Remarkably, by combining each MOF with the conductive 2,3,6,7,10,11-hexahydroxytriphenylene(HHTP) additive, a composite material, HHTP/CTGU-26(Ni)–I was confirmed to have an excellent performance for MOR with a high mass specific peak current of 25.55 ​mA ​cm−2. Four new isostructural coordination polymers, [M 2 (μ 2 -H 2 O)(DTBC) 2 ] (CTGU-26(M), M ​= ​Zn, Cd, Co and Ni] have been prepared with one new butterfly-typed nitroheterocyclic carboxylate ligand was prepared and characterized. And the luminescent properties and methanol oxidation reaction were also discussed. [Display omitted] • Four new isostructural coordination polymers have been prepared with a new butterfly-typed nitroheterocyclic carboxylic acid. • They feature an unusual 2-nodal (4,8)-connected scu topological network generated by binuclear units and DTBC2− anion linkers. • The luminescent properties and the electrocatalytic MOR activities of four complexes has been studied and discussed. [ABSTRACT FROM AUTHOR]

• Structural features of lanthanide coordination polymers are reviewed. • Crystal structures of lanthanide coordination polymers are provided. • Coordination environment of lanthanides is discussed. • The role of lanthanides in modulating the structural pattern is revealed. • Catalytic applications of lanthanide coordination polymers are highlighted. The review showcases the structural features of an array of recently reported lanthanide coordination polymers with catalytic properties. The field of lanthanide coordination polymers has considerably progressed during the last decade placing it at the forefront of the materials science. The wealth of obtained data clearly demonstrates that lanthanides play a determinant role in tailoring the structural pattern, coordination environment, dimensional configuration and network architecture of coordination polymers. As a rule, the lanthanide(III) ions possess a high coordination number and a large atomic radius, and because of that they tend to generate highly connected complex structures with different coordination geometry. In this way, they easily build two-dimensional and three-dimensional architectures with definite channels and permanent pores. Owing to their strong oxophilic propensity and hard Lewis acid character, lanthanides effectively succeed in creating robust, stable coordination polymers and MOF structures and viable matrices via strongly binding the coordinating groups of the accurately selected organic linkers. Such unique particularities involve a distinct morphology, diverse crystal structures, uniform porosity, a defined pore size and shape, precisely controlled number and dimensions of channels. Their specifically designed configurations allow the access of guest molecules and a controlled distribution of the metal ions on the surface or within the network. Additionally, the lanthanide ions afford new synergistic Lewis acid sites beneficial for productive catalytic applications. These attractive capabilities of lanthanide coordination polymers enabled them to be fruitfully used as sustainable and recyclable heterogeneous catalysts in diverse organic transformations. like carbon-carbon bond forming, Strecker reaction, CO 2 cycloaddition, Knoevenagel condensation, hydroboration and cyanosilylation. [ABSTRACT FROM AUTHOR]

Abstract: Four new metal-radical complexes - [Cu(NIT3Py)2(DTB)2] 1, [Co(NIT3Py)2(DTB)2(CH3OH)2] 2, [Cu(NIT4Py)2(DTB)2(H2O)2] 3, [Co(NIT4Py)2(DTB)2(H2O)2] 4, (NIT3Py=2-(3′-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide], NIT4Py=2-(4′-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide], DTB=3,5-dinitrobenzoic anion) have been synthesized by using transition metal ions, nitronyl nitroxide radicals as spin carriers, and incorporating 3,5-dinitrobenzoic acid (DTB) as a coligand. The structures of 1–4 were determined by X-ray single-crystal analyses. Complex 1 has a square planar geometry, where the Cu(II) ion is located in the central site of the rectangle and two radicals and two DTBA ligands are trans-coordinated to the Cu(II) ion. The other three complexes (2-4) have similar structures, in which two radicals, two DTBA ligands and two solvent molecules act as terminal ligands to form six coordinate distorted octahedrons. The magnetic behaviors of these compounds indicate that antiferromagnetic exchanges exist between the radical ligands and the metal ions, and their magnetic properties are explained by their structures and a magnetic exchange mechanism. [Copyright &y& Elsevier]

• First Pd@ZIF-92 nanocatalyst for efficient C(sp2)-C(sp2) cross-coupling reactions. • Post-synthetic modification of ZIF-90 to ZIF-92 and Pd@ZIF-92. • High catalytic activity and recyclability for reactions in pure water. • Environment-friendly, stable and robust nanocatalyst for cross-couplings. Herein the first ever Pd2+-decorated ZIF-92 nanostructure is readily accessed by post-synthesis modification (PSM) of the zeolitic imidazolate framework ZIF-90. Thus, the imidazolate linker of the ZIF-90 is functionalized with the hydroxyethylimino group, followed by anchoring the palladium catalytically active sites through a tight coordination of Pd2+ ions to both the N and O atoms of ZIF-92. The acquired data (by PXRD, EDS, SEM, XPS, ICP-AES) concerning the crystalline structure, elemental mapping and network configuration of the Pd@ZIF-92 catalyst confirmed its structure, before and after the cross-coupling reactions and following recycling. The Pd@ZIF-92 showed excellent catalytic activity (>99%) and chemoselectivity in Suzuki-Miyaura coupling proceeding in neat water, at very low Pd loading (0.009 mol%). Comparison of its performance with that of many reported Pd nanocatalysts operating in aqueous/protic media testifies to its superiority. The appealing gateway to this innovative, stable, robust, easily recoverable and reusable Pd@ZIF-92 nanostructure recommends its beneficial utilization in C(sp2)-C(sp2) cross-couplings and other sustainable, environmentally-friendly processes. [ABSTRACT FROM AUTHOR]

Graphical Abstract Eight novel three-dimensional lanthanide coordination polymers, [Ln(dcob)(DMF)(H 2 O)] n based on 2-(3,5-dicarboxybenzyloxy) benzoic acid, were prepared and characterized. 3 , 4 , 6 and 7 show luminescence of the trivalent lanthanides. Highlights • Eight lanthanide coordination polymers were prepared and characterized. • The structure shows a 3D framework with [Ln 2 (dcob) 6 (DMF) 2 (H 2 O) 2 ] building block. • 3 , 4 , 6 and 7 show luminescence of the trivalent lanthanides. Abstract A series of novel three-dimensional lanthanide coordination polymers with the building block [Ln 2 (dcob) 6 (DMF) 2 (H 2 O) 2 ], [Ln(dcob)(DMF)(H 2 O)] n [Ln = Pr (1), Nd (2), Sm (3), Eu (4), Gd (5), Tb (6), Dy (7), Er (8), H 3 dcob = 2-(3,5-dicarboxybenzyloxy) benzoic acid, DMF = N , N -dimethylformamide], were prepared under hydrothermal conditions and characterized by X-ray single-crystal diffraction, infrared spectroscopy, elemental analysis and thermogravimetric analysis. 3 , 4 , 6 and 7 show luminescence of the trivalent lanthanides. [ABSTRACT FROM AUTHOR]

[Display omitted] • Four 3D Ln-MOFs based on the imidazolium ligand were prepared and characterized. • Ln-MOFs display a pillar-layer porous structure with 3D open channels. • Compounds 1 , 2 and 4 exhibit the luminescence of the trivalent lanthanide ions. A series of novel three-dimensional lanthanide metal–organic frameworks (Ln-MOFs) were prepared under solvothermal conditions. These Ln-MOFs are formulated as [Ln 4 (L) 3 (H 2 O) 8 ] n ·3nNO 3 , [Ln = Sm (1), Eu (2), Gd (3), Tb (4), H 4 L+Cl- = 1,3-bis(3,5-dicarboxyphenyl) imidazolium chloride]. Complexes 1 – 4 were characterized by X-ray single-crystal diffraction, infrared spectroscopy, powder X-ray diffraction and thermogravimetric analysis. Compounds 1 , 2 and 4 display the luminescence of the trivalent lanthanide ions, due to the 4f n -4f n transitions. In addition, the luminescence lifetime of 2 has been thoroughly investigated. [ABSTRACT FROM AUTHOR]

Six novel photoluminescent Ln–Cu(I) heterobimetallic 3D coordination polymers, [LnCu (pyip 2 − ) 2 (H 2 O)] n ( 1 – 6 ) (where Ln is Pr, Nd, Sm, Eu, Gd, Ho, respectively, and H 2 pyip = 5-(4-pyridyl) isophthalic acid) have been synthesized in a concise and reproducible manner under hydrothermal conditions. All of these substances were fully characterized by appropriate spectroscopic methods and elemental analysis. Structural determinations revealed that 1 – 6 are isomorphic and display 3D frameworks. Luminescent properties of the obtained compounds have been studied in detail revealing light emissions of warm white, cool white and light blue for 3 , 4 and 5 , respectively. The effectiveness of association of a rare earth with a transition metal in producing valuable luminescent materials for practical applications is demonstrated. [ABSTRACT FROM AUTHOR]

The hydrothermal reaction of Ln(NO3)3·6H2O, 3-(4-carboxyphenyl)-2,6-pyridinedicarboxylic acid (H3cppdc) and N,N-dimethylformamide (DMF) gave a series of lanthanide coordination polymers n[NH2(CH3)2]·[Ln(cppc)2(H2O)2]n (where: Ln=Ce (1), Pr (2), Nd (3), Sm (4), Eu (5), Gd (6), Tb (7), Dy (8), Ho (9) and Er (10); and H2cppc=5-(4-carboxyphenyl)-2-pyridinecarboxylic acid). The H2cppc ligand was formed in situ via decarboxylation of the initial H3cppdc ligand under the hydrothermal reaction conditions. Complexes 1-10 that crystallized in the same C2/c space group, exhibited similar 2D layered structures and assemble into 3D supramolecular networks via hydrogen bonding and π-π stacking interactions. In addition, the luminescence properties of complexes 4, 5, 7 and 8 were investigated. [ABSTRACT FROM AUTHOR]

Two novel two-dimensional copper–nitroxide coordination polymers of formula [Cu2(NIT3Py)2(glu)2]n (1) and {[Cu2(NIT3Py)2(adip)2]·CH3OH·0.5H2O}n (2) (NIT3Py=2-(3′-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, H2glu=glutaric acid and H2adip=adipic acid), have been synthesized and characterized structurally as well as magnetically. The crystal structures of both polymers contain the paddle-wheel binuclear Cu(II) units axially coordinated by NIT3Py ligands which are bridged by the flexible glutarate or adipate anions into the corrugated 2D sheets. Interestingly, complex 1 displays a 2D helical layer structure rarely found in metal–nitroxide systems. The magnetic measurements show the strong antiferromagnetic interactions in the binuclear Cu(II) units and weak antiferromagnetic interactions between copper ions and nitroxides. [ABSTRACT FROM AUTHOR]

[Display omitted] • Four CPs (Co, Mn, Zn, Cd) based on mixed ligands were prepared and characterized. • 1 , 3 and 4 display 1D chains whereas 2 shows a 2D layer structure. • Magnetic susceptibility of 1 and 2 and luminescence of 3 and 4 have been investigated. Four novel mononuclear coordination polymers [Co(tmba)(phen)(H 2 O) 0.5 ] n (1), [Mn(tmba)(phen)] n (2), [Zn(tmba)(phen)] n (3) and [Cd(tmba)(phen)(H 2 O)] n (4), H 2 tmba = 4,4′-thiobis(methylene)bibenzoic acid, phen = 1,10-phenanthroline, were synthesized under hydrothermal conditions and characterized by single crystal X-ray diffraction, powder X-ray diffraction, infrared spectroscopy, and thermogravimetric analysis. Single crystal X-ray diffraction showed that compounds 1 , 3 and 4 build 1D chains whereas complex 2 displays a 2D layer configuration. Magnetic susceptibility measurements indicate that compound 1 exhibits the coexistence of spin–orbit coupling and antiferromagnetic interaction in the binuclear Co(II) center. Compound 2 manifests an antiferromagnetic interaction within the Mn(II)-carboxyl chain. Moreover, based on the solid state emission spectra of compounds 3 and 4 , and of H 2 tmba and phen, relevant fluorescence properties have been investigated. [ABSTRACT FROM AUTHOR]

Abstract: Porous α-Fe2O3 nanorods with typical pore size of 2–4nm were controlled prepared by a facile hydrothermal process of Fe(NO3)3·9H2O aqueous solution in the presence of NaOH, followed by a calcination treatment. Contrast experiments indicate that the morphology and crystalline structure of the hydrothermal products depend greatly on the quantity of NaOH. Hematite nanoparticles and microplates were respectively obtained under conditions without or with excess NaOH. The porous α-Fe2O3 nanorods exhibit a high BET surface area of 105.1m2 g−1 and a pore volume of 0.13m3 g−1. UV–vis measurement shows wide absorption to visible light and an obvious blue-shift of the adsorption edge due to the quantum size effect. The visible-light photocatalytic performances of the as-prepared samples were evaluated by photocatalytic decolorization of methylene blue at ambient temperature. The results indicate that the photocatalytic activity of the porous α-Fe2O3 nanorods is superior to hematite nanoparticles and platelets and exhibit good reusable feature. The photocatalytic process of porous structure is determined to be pseudo-first-order reaction with apparent reaction rate constant of 1.04×10−2 min−1. And the optimum photocatalyst dosage is 20mg per 100mL of dye solution. The porous α-Fe2O3 nanorods are considered potential photocatalyst for practical application due to the excellent photocatalytic behavior and good reusability. [Copyright &y& Elsevier]

Abstract: Two novel coordination polymers [Cd(BTC)1/2(H2O)3]·H2O (1) and [SmCu2K(BTC)2(H2O)4]·2H2O (2) (H4BTC=1,2,3,4-butanetetracarboxylic acid) have been synthesized at room temperature. Single-crystal X-ray diffraction analysis has revealed that 1 forms a two-dimensional network, while 2 forms a heterometallic three-dimensional framework. Furthermore, the luminescence properties of 2 have been studied. [Copyright &y& Elsevier]

Abstract: Two heterometallic coordination polymers, {KBa(ptc)(H2O)2}n(1) and {KCaEr(ptc)2(H2O)}n(2) (H3ptc=pyridine-2,4,6-tricarboxylic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR and single crystal X-ray diffraction. 1 and 2 exhibit two novel three-dimensional (3D) frameworks, and the luminescence properties of 1, 2 were investigated. [Copyright &y& Elsevier]

Abstract: Three new magnetic compounds were synthesized by using 2-(2′-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (NIT2Py) and tris(2-benzimidazolymethyl)amine (NTB) as ligands. The structures and magnetic properties of the complexes with formula [Ni(NIT2Py)(NTB)](ClO4)2(CH3OH) 1, [Mn(NIT2Py)(NTB)](ClO4)2 2 and {[Zn(NIT2Py)2(CH3OH)2](ClO4)2}{[Zn(NTB)(H2O)](ClO4)2} 3 were characterized. Compounds 1 and 2 both have [M(NIT2Py)(NTB)] structural units, where the metal ion is in an octahedral environment bound to one NIT2Py through one pyridyl nitrogen atom and one nitroxide oxygen atom. However, compound 3, the chelating zinc ion has two crystallographically independent molecules in the asymmetric unit: one is six coordinated octahedral structure [Zn(NIT2Py)2(CH3OH)2](ClO4)2, and the other one is five coordinated pyramidal structure [Zn(NTB)(H2O)](ClO4)2. The magnetic behaviors of these compounds indicate that both the nickel ion and the manganese ion are antiferromagnetically coupled with the NIT2Py ligand with a coupling constant of −19.44 and −0.37cm−1, respectively, whereas two NIT2Py ligands in compound 3 are ferromagnetically coupled with a coupling constant of 19.1cm−1. [Copyright &y& Elsevier]

Abstract: The novel Pd(II) complex, [Pd2(μ-bzta)4]·1.5DMSO (where bzta=benzothiazole-2-thiolate) has been synthesized and structurally characterized by element analysis, IR and single-crystal X-ray diffractometry. In the binuclear complex, two palladium(II) are bridged by four deprotonated benzothiazole-2-thialate in a head to tail disposition and the distance of the two Pd(II) is 2.747Å. Three-dimensional structure of the complex was constructed though S⋯S (3.339Å) weak interaction and π⋯π stack. The binding of the title complex with fish sperm DNA (FS-DNA) has been investigated by absorption and fluorescence spectra. The results indicate that the complex bind to FS-DNA in an intercalative mode and the intrinsic binding constant K of the title complex with FS-DNA is about 1.2×104 M−1. Gel electrophoresis assay demonstrates the ability of the complex to cleave the pUC19 plasmid DNA. [Copyright &y& Elsevier]

[Display omitted] • Five Ln-CPs [Ln(BCBI)(NO 3) 2 H 2 O] n based on a benzimidazole zwitterion (HBCBI) were prepared. • Complexes 1 , 2 , 4 and 5 show luminescence of the trivalent lanthanides. • HBCBI ligand can act as effective antennae for photosensitization of Ln3+ ions. A series of novel lanthanide coordination polymers (Ln-CPs) were herein prepared from lanthanide salts and a zwitterionic common ligand, under hydrothermal conditions. These cationic Ln homometallic frameworks with two-dimensional architectures, designated as [Ln(BCBI)(NO 3) 2 (H 2 O)] n , where Ln = Sm (1), Eu (2), Gd (3), Tb (4), Dy (5), and HBCBI = 1,3-bis(carboxymethyl)benzimidazole zwitterion, have been characterized by X-ray single-crystal diffraction, infrared spectroscopy, elemental and thermogravimetric analyses. Due to the 4f n -4f n transition, complexes 1 , 2 , 4 and 5 show the luminescence characteristic for trivalent lanthanides. Moreover, the fluorescence lifetime of 2 and the phosphorescence spectrum of 5 at 77 K have been investigated. The relationships between the lowest triplet state energy level of the HBCBI ligand and the lowest resonance energy levels of the Sm3+, Eu3+, Tb3+ and Dy3+ ions were examined. The results showed that the energy transfer from the HBCBI ligand is effective. The structural impact of the ligand is also highlighted. [ABSTRACT FROM AUTHOR]

• Nine lanthanide CPs with 1,3-bis(carboxymethyl) imidazolium were prepared. • 3D framework (1 – 3) and 2D layer (4 – 9) were formed, respectively. • 3 , 4 , 6 and 7 show luminescence of the trivalent lanthanides. Nine lanthanide coordination polymers based on 1,3-bis(carboxymethyl) imidazolium (HBCI), [Ln(μ 3 -BCI)(NO 3) 2 H 2 O] n (Ln = Pr (1), Nd (2), Sm (3)) and [Ln(μ 4 -BCI)(NO 3) 2 H 2 O] n (Ln = Eu (4), Gd (5), Tb (6), Dy (7), Ho (8), Er (9)), were synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectroscopy, PXRD analysis, thermogravimetry analysis and single-crystal X-ray diffraction. Crystal structures of the complexes 1 – 3 show a three-dimensional framework and those of 4 – 9 exhibit a two-dimensional layer, due to the various linking modes of HBCI. Complexes 3 , 4 , 6 and 7 show luminescence of the trivalent lanthanides. The fluorescence lifetime and quantum efficiency of 4 as well as the phosphorescence spectrum of 5 were measured. [ABSTRACT FROM AUTHOR]

The 1,3-bis(carboxymethyl)imidazolium salt (zwitterion) (HBCI) was reacted, under solvothermal conditions, with rare earth chlorides to provide a series of new two-dimensional (2D) coordination polymers, namely [LnBCI) (HCOO) (H 2 O) 2 Cl] n [Ln = Sm (1); Eu (2); Gd (3); Tb (4); Dy (5)]. The complexes were characterized by X-ray single crystal diffraction, powder X-ray diffraction, infrared spectroscopy, elemental analysis and thermogravimetric analysis. Compounds of 1 , 2 , 4 and 5 exhibit the characteristic luminescence of the corresponding lanthanide ions, due to the 4fn-4fn transition. Furthermore, the fluorescence lifetime of 2 and the phosphorescence spectrum of 5 at 77k are discussed. Five 2D coordination polymers, namely [LnBCI) (HCOO) (H 2 O) 2 Cl] n [Ln = Sm (1); Eu (2); Gd (3); Tb (4); Dy (5)] [HBCI = 1,3-bis(carboxymethyl)imidazolium salt] were prepared and structurally characterized. Luminescence properties of 1 , 2 , 4 and 5 , fluorescence lifetime of 2 and the phosphorescence spectrum of 5 are discussed. Image 1 • Five 2D CPs [LnBCI) (HCOO) (H 2 O) 2 Cl] n were prepared and characterized. • 1,3-Bis(carboxymethyl)imidazolium salt (zwitterion) (HBCI) was used as organic linker. • Compounds 1 , 2 , 4 and 5 show luminescence of the trivalent lanthanides. • The energy transfer processes of the Ln CPs were investigated. [ABSTRACT FROM AUTHOR]