Open-framework Zincophosphate Research Articles

Synthesis and characterization of a new organically templated zincophosphate: (C 2N 2H 10) 2[Zn(PO 4) 2

A new open-framework zincophosphate, (C 2N 2H 10) 2[Zn(PO 4) 2], has been synthesized hydrothermally from a mixture of zinc chloride, phosphoric acid, ethylenediamine and deionized water. It has the following crystal data: orthorhombic space group P ccn, a = 17.056(3) Å, b = 8.4219(17) Å, c = 8.7260(18) Å, V = 1253.4(4) Å 3, Z = 4. The crystal structure of the title compound is characterized by corner-sharing PO 4 and ZnO 4 tetrahedra, leading to infinite corner-shared four-membered ring chains. There is extensive Zn–O–P bonding in the structure in the form of infinite chains. The structure is stabilized by template-to-framework hydrogen bonding. The title compound was also characterized by IR spectroscopy and TG–DTA. Luminescent measurement of (C 2N 2H 10) 2[Zn(PO 4) 2] shows an emission band between 665 nm and 688 nm when excited with 451 nm UV light.

Na[H2TETA]0.5 [ZnPO4]2×0.5H2O or TJPU‐1: A New Zincophosphate Open‐Structure Co‐Templated by Sodium and Organoamine.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

(C5H14N2) [Zn3(HPO4)4], a New 3D Open‐Framework Zincophosphate Synthesized by Hydrothermal Reversible Transformation of (C5H14N2) [Zn2(HPO4)3]×H2O.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Na[H2TETA]0.5[ZnPO4]2·0.5H2O or TJPU-1: A New Zincophosphate Open-structure Co-templated by Sodium and Organoamine

Synthetic open-structured materials attract increasing attention for wide applications in catalysis, ion-exchange or intercalation. Metal phosphates are possibly the fastest expanding group of open-framework inorganic materials in the past decade. The structural diversity that stemmed from the variable coordination number and oxidation states has directed to the extensive expansion of open-framework metal phosphates. Since the bivalent metal phosphates (+2, +5) are associated with the same total charge as aluminosilicate zeolites (+3, +4), phosphate-based framework structures containing bivalent metals are considerably pursued. After the discovery of the first open-framework zincophosphate with zeolite topologies reported by G. D. Stucky, a great deal of effort has been devoted to isolating novel open-structures within this system. And this compound group has experienced extraordinary expansion in terms of the diversity of their structures and compositions. Zincophosphates with zero-, one-, two-, and three-dimensional architectures have been isolated, in which an eye-catching result is the gigantic pore structure with 24-membered rings in ND-1. This variety was achieved by varying a number of factors that can influence the structure, including template, pH, solvent, reaction temperature, additives, zinc source and others. On the other hand, the pursuit of chiral molecular sieves is of great interest with respect to the applications in enantioselective separation and syntheses. However, only a few inorganic chiral frameworks were known up to now. For the syntheses of open-structured crystals, both alkali cations and organoamine are used as structure directing reagent separately in the literatures. Although there are some compound containing both of them, systematically investigation of the co-template effect of alkali cations and organoamines is seldom. Our group has focused on metal phosphate open-structures for many years. Recently, we are interest in exploring new open-framework metal phosphates co-templated by alkali cation and organoamine. This approach has successfully yielded a new zincophosphate openstructure, Na[H2TETA]0.5[ZnPO4]2·0.5H2O (TETA = triethylenetetraamine) or TJPU-1 (TJPU = Tianjin Polytechnic University), with the zeolite CZP topology. This compound contains left-handed chiral channels along its c axis. Here we report its synthesis and crystal structure. Experimental Section

An Open-framework Zincophosphate with Intersecting Channels

Abstract An open-framework zincophosphate has been synthesized under hydrothermal conditions; its structure is constructed by PO4, ZnO4 and ZnO6 groups; the linkage of PO4 and ZnO4 give rise to a sheet structure that is pillared by ZnO6 forming a two-dimensional intersecting channel system.

Hydrothermal Synthesis and Structure of a Neutral Open-Framework Zincophosphate

A neutral open-frame work zincophosphate has been hydrothermally synthesized: structure refinement shows that it is composed of Zn4O12 tetramers and infinite Zn-O-Zn chains that are linked by PO4 groups forming one-dimensional 16-membered ring channels along b direction.

Synthesis and structure of a novel open-framework zincophosphate with intersecting three-dimensional helical channels

A new open-framework zincophosphate, Zn0.5(H2PO4)·0.5H2O (denoted as FJ-13), possessing intersecting three-dimensional helical channels, has been synthesized under solvothermal conditions.

Synthesis and characterization of Mu-19, a new zincophosphate with a three-dimensional 12-membered ring channel system

A new three-dimensional open-framework zincophosphate [C 5H 12NO][ZnP 2O 5(OH) 3]·H 2O, named Mu-19, was synthesized at room temperature from a ZnO/P 2O 5/ N-methylmorpholine/H 2O system. The crystal structure was determined by single crystal X-ray diffraction. The zincophosphate crystallizes in the orthorhombic space group P2 12 12 1 (no. 19) with a=9.976(4), b=10.359(6), c=12.980(10) Å, V=1341.4(14) Å 3 and Z=4. The structure consists of ZnO 4, PO 2O(OH) and PO 2(OH) 2 tetrahedra linked to form an open structure with a three-dimensional channel system delimited by 12-membered ring openings. The organic structure-directing amine is hydrogen bonding to the inorganic framework via water molecules. The zincophosphate Mu-19 is further characterized by 13 C CP MAS/ 31 P MAS NMR with high power decoupling and 1 H CRAMPS NMR spectroscopy, SEM and thermal analyses.

The synthesis and crystal structure of a new open-framework zincophosphate UiO‐17

A novel three-dimensional open-framework zincophosphate 2[N2C4H12]2+[Zn7(H2O)2(PO4)6]4– has been synthesised hydrothermally, and characterised by powder and single crystal X-ray diffraction, thermogravimetric analysis and solid state 31P MAS and 13C CP MAS NMR spectroscopy. The compound crystallises in the monoclinic space group C2/c with a = 16.134(3), b = 8.241(2), c = 22.860(5) A, β = 104.05(3)°, V = 2948.4(10) A3 and Z = 4. The open framework contains a two-dimensional staggered eight-membered ring channel system running along [001] and [011] in which diprotonated piperazinium cations reside. The framework consists of ZnO4 and PO4 tetrahedral units, in addition there are ZnO4(H2O) trigonal bipyramids which together with Zn–O–Zn bonding lead to an interrupted framework rather than alternating ZnO4 and PO4 linkages. The framework is an example of symmetry matching between template and framework as a symmetry element of piperazine constrains the framework structure.

Synthesis and structure determination of a 2D open-framework zincophosphate templated by cyclohexylamine molecules

The synthesis and crystal structure of a new bidimensional zincophosphate (ZnPO) are reported. Zn2(HPO4)2Cl2·2NC6H14 crystallizes in the monoclinic space group P21/a (n°14) with a = 8.830(3) A, b = 9.278(3) A, c = 26.950(9) A, β = 90.74(3)°, V = 2207.7(1) A3 and Z = 4. This new material consists of a 2D open-framework of corner sharing ZnO3Cl and PO3OH tetrahedra alternating with planes of protonated cyclohexylamine molecules (NC6H14)+. The organic molecules are interconnected to the framework through hydrogen bonds.

A novel open framework zincophosphate: Synthesis and characterization

The crystallization of a reactive zincophosphate gel (which may contain Co(II) component) in the presence of sodium cations at ambient temperature and pressure yielded products (abbreviated ZnPO-HEX or CoZnPO-HEX) with a novel anionic open framework topology. The Co(II) ions isomorphously replace zinc(II) in this zincophosphate lattice up to 30%. The hopeite phase appears as a precursor in the crystallization of these new products. The single crystal structure determination of CoZnPO-HEX reveals that the structure belongs to the hexagonal P6 1 space group with unit cell parameters a = 10.447(3) and c = 15.049(5)Å. The structure consists of a three-dimensional tetrahedral framework containing one-dimensional six-ring channels. An infinite helix built up of sodium cations and water molecules has been found inside the channel. The helix plays an important structural role because a complete dehydration of the materials is the cause for the transformation of the hexagonal structure to an unknown crystalline phase.