Wen-Yu Yin

Structural diversification and photocatalytic properties of zinc(II) polymers modified by auxiliary N-containing ligands

Four new coordination polymers, {[Zn(bismip)]·2H2O}n (1), {[Zn2(bismip)2(4,4′-bipy)]·2H2O}n (2), {Zn2(bismip)2(phen)}n (3) and {[Zn(bismip)(bimb)]2·2H2O·DMF}n (4) (H2bismip = 5-(1H-benzoimidazol-2-ylsulfanylmethyl)-isophthalic acid, 4,4′-bipy = 4,4′-bipyridine, phen = 1,10-phenanthroline, bimb = 4,4-bis(1-imidazolyl)bibenzene) were synthesized under solvothermal conditions. All these compounds were characterized by elemental analysis, IR spectroscopy, thermal analysis, powder X-ray diffraction and single-crystal X-ray diffraction. Compound 1 features a two-dimensional (2D) binodal (3,6)-connected kgd network with (43)2(46·66·83) topology. 2 exhibits two-fold interpenetrating 3D architecture with a (4·82)(42·84) Schlafli symbol in which 2D layers are interlinked by 4,4-bipy ligands. In 3, the [Zn4(bismip)4] and [ZnO4N2] units are interconnected, affording a binodal 3D (3,4)-connected network with the Schlafli symbol (83)(86). 4 is a 2D (3,4)-connected coordination network with (42·6)(42·63·8) topology. The photoluminescence properties and photocatalytic properties of these compounds were also investigated.

Syntheses and characterization of 2-D lanthanide complexes based on and isonicotinate N-oxide ligand

The lanthanide complexes [Ln2(INO)2(SO4)2(H2O)4] · H2O 1 · Ln (Ln = Ce, Pr, and Nd; INO = isonicotinate N-oxide) were synthesized under hydrothermal conditions. The compounds are isostructural and crystallized in monoclinic space group C2/c. Ln(III) is nine-coordinate in a mono-capped square antiprism coordination environment. Ln(III) ions are linked by , N-oxide groups and carboxylates from INO to give an inorganic chain. These chains are connected by INO ligands into a 2-D layer. These layers are joined through hydrogen bonding interactions into a 3-D crystal structure.

Eight novel metal diphosphonates based on 2-(4-pyridinyl)-1-hydroxyl-1,1-ethylidenediphosphonate: syntheses, structures, and magnetic properties

A systematic exploration of a series of hydrothermal reactions of 2-(4-pyridinyl)-1-hydroxyl-1,1-ethylidenediphosphonic acid (4-pyHhedpH3) with manganese, cobalt and copper salts resulted in eight new compounds, namely, Mn(4-pyHhedpH)·H2O (1), Co(4-pyHhedpH)·H2O (2), Co(4-pyHhedpH2)(C2O4)0.5(H2O)·H2O (3), Co3(4-pyHhedpH)2(C2O4)(H2O)2 (4), Cu(4-pyHhedpH2)2 (5), Cu(4-pyHhedpH) (6), CuICuII3(4-pyhedpH0.5)2 (7) and Cu3(4-pyHhedpH)2(C2O4) (8). Compounds 1 and 2 are isostructural and have ladder-like structures in which the {M2(μ-O)2} (M = Mn, Co) dimer units are connected by O–P–O bridges, whereas, compound 3 has a one-dimensional chain structure, where the Co atoms are alternatively linked by C2O42− and O–P–O bridges. Compound 4 contains one chain similar to that of compound 3, while, the chains are further connected by O–P–O bridges to generate a brick-like layer. Compound 5 has a mononuclear structure in which the central Cu ion is chelated by four O atoms from two 4-pyHhedpH ligands, giving a quadrilateral planar coordination shape. Compound 6 has chain-like structures, where {Cu2(μ-O)2} dimers are connected by edge-shared {CuO5} square pyramids to form infinite chains. In compound 7, the {Cu3(O)4} trimers are bridged by O–P–O groups to form infinite chains which are further connected by the pyridinyl groups and {O–CuI–O} units to afford layers. Compound 8 has a two-dimensional structure similar to that of compound 4. The temperature-dependent magnetic susceptibility measurements show dominant antiferromagnetic interactions in compounds 1–4 and 6–8 mediated through O–P–O and/or μ-O bridges between the metal centers. The magnetization measurements reveal that compound 2 shows field-induced magnetic transition at low temperature.

Alkyl group-directed assembly of coordination polymers based on bis-(4-imidazol-1-yl-phenyl)-amine and their photocatalytic properties

Hydrothermal reactions of Zn(NO3)2·6H2O or CdCl2·2.5H2O with bis-(4-imidazol-1-yl-phenyl)-amine (bimpa) and 5-methyl-1,3-benzenedicarboxylic acid (5-Me-1,3-H2BDC) or 5-tert-butyl-1,3-benzenedicarboxylic acid (5-tb-1,3-H2BDC) afforded four coordination polymers, [Zn2(5-Me-1,3-BDC)2(bimpa)2]n (1), {[Cd2(5-Me-1,3-BDC)2(bimpa)(H2O)4]·H2O}n (2), {[Zn(5-tb-1,3-BDC)(bimpa)]·2H2O}n (3) and {[Cd(5-tb-1,3-BDC)(bimpa)]·H2O}n (4). Complexes 1–4 were characterized by elemental analysis, IR, powder X-ray diffraction, and single-crystal X-ray diffraction. 1 exhibits a 4-fold interpenetrating 3D framework in which 1D curvilinear chains are interconnected by bimpa ligands. 2 can be considered as a 3D supramolecular architecture based on 2D entanglements which consist of 1D tubes in parallel interpenetration. 3 and 4, respectively, have 2D (65·8) layers (3) and 2D layers constructed by 1D tubes (4), which are further extended into two 3D supramolecular architectures through weak hydrogen-bonding and π⋯π interactions. The solid state luminescence and optical properties of 1–4 at ambient temperature were also investigated. A comparative study on their photocatalytic activity toward the degradation of methylene blue in polluted water was explored.

ZINC, CADMIUM AND LEAD DIPHOSPHONATES: SYNTHESES, STRUCTURES AND LUMINESCENT PROPERTIES AND THEIR POTENTIAL AS SOFT-OXOMETALATE PRECURSORS

Four new metal diphosphonates Zn(pyHhedpH)⋅H2O(1), Cd(pyHhedpH)⋅H2O(2), Pb(pyHhedpH)⋅H2O(3) and Pb2(pyHedpH)2(4) (pyHhedpH3 = 2-(4-pyridyl)-1-hydroxyl-1,1-ethylidenediphosphonic acid, pyedpH4 = (2-(pyridin-4-yl)ethene-1,1-diyl)diphosphonic acid) were synthesized under hydrothermal conditions. Compounds 1 and 2 are isostructural and have ladder-like chain structures in which the {M2((μ - O)2)}(M = Zn, Cd) dimer units are connected by O-P-O bridges. Compound 3 shows a unique type of double chain structure, in which the adjacent {Pb2(μ - O)2} dimers are bridged by O-P-O and O-P-C-O groups into a chain. Compound 4 has a 2D structure, where the vertex-shared {PbO5} polyhedra are connected by {CPO3} tetrahedra through corner-sharing. The photoluminescence properties of compounds 1-4 were studied. Their potential as soft-oxometalate precursors is also discussed.

CCDC 860657: Experimental Crystal Structure Determination

Related Article: Yun-Sheng Ma, Wen-Yu Yin, Wang-Shui Cai, Ping-Zhou Zhu, Xiao-Yan Tang, Rong-Xin Yuan, Soumyajit Roy|2013|RSC Advances|3|18430|doi:10.1039/C3RA43137A

CCDC 800693: Experimental Crystal Structure Determination

Related Article: Yun-Sheng Ma, Xiao-Yan Tang, Wen-Yu Yin, Bin Wu, Feng-Feng Xue, Rong-Xin Yuan, S.Roy|2012|Dalton Trans.|41|2340|doi:10.1039/c1dt11250c