The Experts below are selected from a list of 1035 Experts worldwide ranked by ideXlab platform

Limin Zheng - One of the best experts on this subject based on the ideXlab platform.

  • Proton conductive Metal phosphonate frameworks
    Coordination Chemistry Reviews, 2017
    Co-Authors: George K. H. Shimizu, Limin Zheng
    Abstract:

    Abstract This review covers basic design principles and offers a cross-section of the current status of phosphonate MOFs as proton conductors. Metal Phosphonates are often sustained by strong bonds that render them very stable materials. The phosphonate group can also coordinate as a protonated species. These factors, coupled with the inherent structural versatility intrinsic to any Metal organic framework family, are the foundation of their interest as proton conducting materials. This review summarizes the recent progress in this topical field as well as some of the existing challenges for further development. The present state of application of the materials is still largely in the academic domain but increasingly, new structures with the necessary proton conducting ability and stability to merit further development as membranes are being reported. The review concludes with a discussion of future challenges for development of this promising field.

  • magnetic materials based on 3d Metal Phosphonates
    Coordination Chemistry Reviews, 2016
    Co-Authors: Limin Zheng
    Abstract:

    Abstract Metal phosphonate chemistry has witnessed a rapid development during the past two decades. Numerous compounds have been synthesized which show new architectures and interesting physical or chemical properties. In this article, we focus on the 3d transition Metal phosphonate clusters with single molecule magnet behavior; chain compounds with single chain magnet behavior; and layer or three-dimensional compounds with ferromagnetism, ferrimagnetism, canted antiferromagnetism, and metamagnetism. Finally, magnetic 3d Metal Phosphonates with multifunctions are also discussed.

  • Homochiral Metal phosphonate nanotubes
    Chemical Communications, 2015
    Co-Authors: Jian Huang, Kazuya Otsubo, Jian-shen Feng, Fengchun Hu, Limin Zheng
    Abstract:

    A new type of homochiral Metal–organic nanotubular structures based on Metal Phosphonates are reported, namely, (R)- or (S)-[M(pemp)(H2O)2][M = CoII (1), NiII (2)] [pemp2− = (R)- or (S)-(1-phenylethylamino)methylphosphonate]. In these compounds, the tube-walls are purely inorganic, composed of Metal ions and O–P–O bridges. The cavity of the nanotube is hydrophilic with one coordination water pointing towards the center, while the outer periphery of the nanotube is hydrophobic, decorated by the phenylethyl groups of pemp2−. The thermal stabilities, adsorption and proton conductivity properties are investigated.

  • M2(pbtcH)(phen)2(H2O)2 [M(II) = Co, Ni]: Mixed-ligated Metal Phosphonates based on 5-phosphonatophenyl-1,2,4-tricarboxylic acid showing double chain structures
    Chinese Chemical Letters, 2014
    Co-Authors: Tao Zheng, Limin Zheng
    Abstract:

    Abstract Two new mixed-ligated Metal Phosphonates, M 2 (pbtcH)(phen) 2 (H 2 O) 2 [M(II) = Co ( 1 ), Ni ( 2 )] (pbtcH 5  = 5-phosphonatophenyl-1,2,4-tricarboxylic acid, phen = 1,10-phenanthroline), have been synthesized and characterized. Both show one-dimensional double chain structures, where the M(phen)(H 2 O) moieties are chelated and bridged by pbtcH 4− through the carboxylate and phosphonate oxygen atoms. The chains are connected by hydrogen bonding interactions and π – π stacking, forming a three-dimensional supramolecular structure. The IR and magnetic properties of the two compounds are also investigated.

  • m2 pbtch phen 2 h2o 2 m ii co ni mixed ligated Metal Phosphonates based on 5 phosphonatophenyl 1 2 4 tricarboxylic acid showing double chain structures
    Chinese Chemical Letters, 2014
    Co-Authors: Tao Zheng, Limin Zheng
    Abstract:

    Abstract Two new mixed-ligated Metal Phosphonates, M 2 (pbtcH)(phen) 2 (H 2 O) 2 [M(II) = Co ( 1 ), Ni ( 2 )] (pbtcH 5  = 5-phosphonatophenyl-1,2,4-tricarboxylic acid, phen = 1,10-phenanthroline), have been synthesized and characterized. Both show one-dimensional double chain structures, where the M(phen)(H 2 O) moieties are chelated and bridged by pbtcH 4− through the carboxylate and phosphonate oxygen atoms. The chains are connected by hydrogen bonding interactions and π – π stacking, forming a three-dimensional supramolecular structure. The IR and magnetic properties of the two compounds are also investigated.

Xintao Wu - One of the best experts on this subject based on the ideXlab platform.

  • new layered Metal Phosphonates based on functionalized phosphonic acids
    Crystal Growth & Design, 2015
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of ZnII or MnII ion with 1-C10H7-CH2N(CH2COOH)(CH2PO3H2)(H3L1), 3-HOOC-C6H4-CH2N(CH2COOH)(CH2PO3H2)(H4L2), and 4-HOOC-C6H4-CH2N(CH2COOH)(CH2PO3H2)(H4L3) afforded six new layered Metal Phosphonates, namely, [Zn3(HL1)3]·3H2O (1), [Zn(HL1)]·CH3COOH (2), [Zn(H2L2)] (3), [Mn(H3L2)2] (4), [Mn(H3L3)2] (5), and [Zn(H2L3)]·H2O (6). Compounds 1–6 are characterized by single-crystal X-ray diffraction (XRD), powder XRD, IR spectroscopy, elemental analysis, and thermogravimetric analysis (TGA). In compounds 1–3 and 6, each [ZnO4] tetrahedron shares three corners with three neighboring [PCO3] tetrahedra to generate a Zn–O–P layer, which consists of eight and four member rings (MRs). While in compounds 4 and 5, each [MnO6] octahedron shares four corners with neighboring four [PCO3] tetrahedra into a Mn–O–P layer containing eight MRs. The organic groups hang on two sides of a Zn–O–P or Mn–O–P layer to form two-dimensional (2D) sandwich-like frameworks of compounds 1–6. TGA and powder XRD reveal tha...

  • syntheses crystal structures thermal stability magnetism and luminescence of four new Metal Phosphonates
    CrystEngComm, 2013
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of Cd2+, Mn2+, Co2+ and Ni2+ ions with 4-pyridyl-CH2N(CH2COOH)(CH2PO3H2) (H3L) afforded four new Metal Phosphonates, namely, (H3O)4[Cd7(L)6]·16H2O (1), (H3O)4[Mn7(L)6]·17H2O (2), [Co(HL)(H2O)]·2H2O (3) and [Ni(HL)(H2O)]·2H2O (4). Compounds 1 and 3 are isomorphous with compounds 2 and 4, respectively. Solid 1 is a 3D open-framework consisting of heptanuclear cadmium clusters. The framework of solid 1 is thermally stable up to 250 °C under an air atmosphere. In 3, HL2− anions exhibit pentadentate modes to combine Co2+ ions into a 2D hybrid layer. It is interesting that solid 1 displays bright blue luminescence, which can be enhanced upon cooling to 10 K. Furthermore, after heat-treatment at 250 °C under an air atmosphere, solid 1-250 also gives off blue emission. And the magnetic properties of 2–4 have also been studied.

  • new 3d Metal Phosphonates with bright tunable luminescence for the reversible sensing of nitrobenzene
    CrystEngComm, 2012
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Two isomorphous 3D Metal Phosphonates, [M2(H2L)] (M = Zn (1), Co (2); H6L = 1,4-((H2O3PCH2)(HOOCCH2)NCH2)2 C6H4, are reported; Solid 1 is stable up to 300 °C under an air atmosphere, displays bright tunable luminescence and offers reversible sensing of nitrobenzene.

  • syntheses crystal structures thermal stabilities and luminescence of two Metal Phosphonates
    CrystEngComm, 2012
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of Zn(II) or Pb(II) ions with 4-pyridyl-CH2N(CH2COOH)(CH2PO3H2) (H3L) afforded two Metal Phosphonates, namely, [Zn3(L)2]·2H2O (1) and [Pb3(L)2(H2O)2]·H2O (2). Compound 1 is a 3D pillared framework in which [ZnO4] tetrahedra and [ZnO3N2] trigonal-bipyramids are connected by L3− anions with heptadentate modes. In 2, L3− anions exhibit pentadentate modes to combine Pb(II) ions into a complicated 2D hybrid layer, resulting in the non-coordinated pyridine rings being sandwiched between the layers. Solid 1 is thermally stable up to 350 °C under an air atmosphere and displays bright purple–blue luminescence, and the luminescent intensity of the hydrated solid 1 can be weakened by nitrobenzene.

  • syntheses crystal structures thermal stabilities magnetism and luminescence of two 3d Metal Phosphonates
    CrystEngComm, 2011
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of ZnII or CuII ion with 1-hydroxyl-2-(3-pyridyl)ethylidene-1,1-diphosphonic acid (H4L) afforded two Metal Phosphonates, namely, [Zn2(L)(H2O)] (1) and [Cu4(L)2 (H2O)4]·(H2O)1.25 (2). In 1, [ZnO3N], [ZnO4] and [PO3C] tetrahedra are connected through corner-sharings to form a 3D framework with a 14MR ellipsoid-like channel. In 2, the [PO3C] tetrahedron also shares corners with a copper square-pyramid ([CuO4N], [CuO5]) into a hybrid layer, which is further pillared by L4− anion into a 3D neutral framework. Solid 1 is thermally stable up to 250 °C under an air atmosphere and displays UV luminescence. More interestingly, the dehydrated phase of 1 is selective and reversible for sensing of nitrobenzene. And the magnetic property of 2 has also been studied.

Ruibiao Fu - One of the best experts on this subject based on the ideXlab platform.

  • new layered Metal Phosphonates based on functionalized phosphonic acids
    Crystal Growth & Design, 2015
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of ZnII or MnII ion with 1-C10H7-CH2N(CH2COOH)(CH2PO3H2)(H3L1), 3-HOOC-C6H4-CH2N(CH2COOH)(CH2PO3H2)(H4L2), and 4-HOOC-C6H4-CH2N(CH2COOH)(CH2PO3H2)(H4L3) afforded six new layered Metal Phosphonates, namely, [Zn3(HL1)3]·3H2O (1), [Zn(HL1)]·CH3COOH (2), [Zn(H2L2)] (3), [Mn(H3L2)2] (4), [Mn(H3L3)2] (5), and [Zn(H2L3)]·H2O (6). Compounds 1–6 are characterized by single-crystal X-ray diffraction (XRD), powder XRD, IR spectroscopy, elemental analysis, and thermogravimetric analysis (TGA). In compounds 1–3 and 6, each [ZnO4] tetrahedron shares three corners with three neighboring [PCO3] tetrahedra to generate a Zn–O–P layer, which consists of eight and four member rings (MRs). While in compounds 4 and 5, each [MnO6] octahedron shares four corners with neighboring four [PCO3] tetrahedra into a Mn–O–P layer containing eight MRs. The organic groups hang on two sides of a Zn–O–P or Mn–O–P layer to form two-dimensional (2D) sandwich-like frameworks of compounds 1–6. TGA and powder XRD reveal tha...

  • syntheses crystal structures thermal stability magnetism and luminescence of four new Metal Phosphonates
    CrystEngComm, 2013
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of Cd2+, Mn2+, Co2+ and Ni2+ ions with 4-pyridyl-CH2N(CH2COOH)(CH2PO3H2) (H3L) afforded four new Metal Phosphonates, namely, (H3O)4[Cd7(L)6]·16H2O (1), (H3O)4[Mn7(L)6]·17H2O (2), [Co(HL)(H2O)]·2H2O (3) and [Ni(HL)(H2O)]·2H2O (4). Compounds 1 and 3 are isomorphous with compounds 2 and 4, respectively. Solid 1 is a 3D open-framework consisting of heptanuclear cadmium clusters. The framework of solid 1 is thermally stable up to 250 °C under an air atmosphere. In 3, HL2− anions exhibit pentadentate modes to combine Co2+ ions into a 2D hybrid layer. It is interesting that solid 1 displays bright blue luminescence, which can be enhanced upon cooling to 10 K. Furthermore, after heat-treatment at 250 °C under an air atmosphere, solid 1-250 also gives off blue emission. And the magnetic properties of 2–4 have also been studied.

  • new 3d Metal Phosphonates with bright tunable luminescence for the reversible sensing of nitrobenzene
    CrystEngComm, 2012
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Two isomorphous 3D Metal Phosphonates, [M2(H2L)] (M = Zn (1), Co (2); H6L = 1,4-((H2O3PCH2)(HOOCCH2)NCH2)2 C6H4, are reported; Solid 1 is stable up to 300 °C under an air atmosphere, displays bright tunable luminescence and offers reversible sensing of nitrobenzene.

  • syntheses crystal structures thermal stabilities and luminescence of two Metal Phosphonates
    CrystEngComm, 2012
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of Zn(II) or Pb(II) ions with 4-pyridyl-CH2N(CH2COOH)(CH2PO3H2) (H3L) afforded two Metal Phosphonates, namely, [Zn3(L)2]·2H2O (1) and [Pb3(L)2(H2O)2]·H2O (2). Compound 1 is a 3D pillared framework in which [ZnO4] tetrahedra and [ZnO3N2] trigonal-bipyramids are connected by L3− anions with heptadentate modes. In 2, L3− anions exhibit pentadentate modes to combine Pb(II) ions into a complicated 2D hybrid layer, resulting in the non-coordinated pyridine rings being sandwiched between the layers. Solid 1 is thermally stable up to 350 °C under an air atmosphere and displays bright purple–blue luminescence, and the luminescent intensity of the hydrated solid 1 can be weakened by nitrobenzene.

  • syntheses crystal structures thermal stabilities magnetism and luminescence of two 3d Metal Phosphonates
    CrystEngComm, 2011
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of ZnII or CuII ion with 1-hydroxyl-2-(3-pyridyl)ethylidene-1,1-diphosphonic acid (H4L) afforded two Metal Phosphonates, namely, [Zn2(L)(H2O)] (1) and [Cu4(L)2 (H2O)4]·(H2O)1.25 (2). In 1, [ZnO3N], [ZnO4] and [PO3C] tetrahedra are connected through corner-sharings to form a 3D framework with a 14MR ellipsoid-like channel. In 2, the [PO3C] tetrahedron also shares corners with a copper square-pyramid ([CuO4N], [CuO5]) into a hybrid layer, which is further pillared by L4− anion into a 3D neutral framework. Solid 1 is thermally stable up to 250 °C under an air atmosphere and displays UV luminescence. More interestingly, the dehydrated phase of 1 is selective and reversible for sensing of nitrobenzene. And the magnetic property of 2 has also been studied.

Norbert Stock - One of the best experts on this subject based on the ideXlab platform.

  • Inorganic–organic hybrid compounds: Synthesis and characterization of three new Metal Phosphonates with similar characteristic structural features
    Journal of Solid State Chemistry, 2020
    Co-Authors: Sebastian Bauer, Thomas Bein, Norbert Stock
    Abstract:

    The phosphonocarboxylic acid H(HO{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH (H{sub 5} L ) was synthesized and characterized by NMR- and IR-spectroscopy, thermogravimetric (TG) analysis and single-crystal X-ray diffraction. Reactions of H{sub 5} L with samarium(III) chloride and calcium(II) chloride resulted in three new compounds, Sm[(O{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH].H{sub 2}O (1), Ca[H(O{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH].H{sub 2}O (2), and Ca[(HO{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH]{sub 2}.4H{sub 2}O (3). The single-crystal structure determination of the title compounds reveals that in H{sub 5} L as well as in compounds 1, 2, and 3 zwitterions are present. Within the M-O building units of the Metal Phosphonates we observed a different degree of dimensionality, depending on the oxidation state of the Metal ion and the synthesis conditions. In 1, one-dimensional chains of edge-sharing SmO{sub 8} polyhedra are observed while in 2, isolated units of edge-sharing CaO{sub 6} octahedra and in 3 isolated CaO{sub 6} octahedra are observed. However, looking at the organic part, the rigid phenyl carboxylic acid moieties arrange in a 'zipper-like' fashion and hydrogen bonding plays an important role in the stabilization of the crystal structure. The title compounds were further characterized by IR spectroscopy andmore » TG analysis. Additionally, the thermal stability of 1 was investigated by temperature-dependent X-ray diffraction. -- Graphical abstract: Hydrothermal reactions of the phosphonocarboxylic acid H(HO{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH with Sm{sup 3+} and Ca{sup 2+} salts has led to three new inorganic-organic hybrid compounds. All crystal structures contain phosphonate zwitterions and have a layer-like arrangement. The rigid organic groups arrange in a 'zipper-like' fashion and hydrogen bonding plays an important role in the stabilization of the crystal structures.« less

  • New directions in Metal phosphonate and phosphinate chemistry
    Crystals, 2019
    Co-Authors: Stephen John Ivor Shearan, Ferdinando Costantino, Paul A. Wright, Franziska Emmerling, Norbert Stock, Jan Demel, Konstantinos D. Demadis, Maria Vassaki, Riccardo Vivani, Sébastien Sallard
    Abstract:

    In September 2018, the First European Workshop on Metal Phosphonates Chemistry brought together some prominent researchers in the field of Metal Phosphonates and phosphinates with the aim of discussing past and current research efforts and identifying future directions. The scope of this perspective article is to provide a critical overview of the topics discussed during the workshop, which are divided into two main areas: synthesis and characterisation, and applications. In terms of synthetic methods, there has been a push towards cleaner and more efficient approaches. This has led to the introduction of high-throughput synthesis and mechanochemical synthesis. The recent success of Metal–organic frameworks has also promoted renewed interest in the synthesis of porous Metal Phosphonates and phosphinates. Regarding characterisation, the main advances are the development of electron diffraction as a tool for crystal structure determination and the deployment of in situ characterisation techniques, which have allowed for a better understanding of reaction pathways. In terms of applications, Metal Phosphonates have been found to be suitable materials for several purposes: they have been employed as heterogeneous catalysts for the synthesis of fine chemicals, as solid sorbents for gas separation, notably CO2 capture, as materials for electrochemical devices, such as fuel cells and rechargeable batteries, and as matrices for drug delivery.

  • high throughput microwave assisted discovery of new Metal Phosphonates
    Dalton Transactions, 2013
    Co-Authors: Mark Feyand, Christopher F Seidler, Carsten Deiter, Andre Rothkirch, Alexandra Lieb, Michael Wark, Norbert Stock
    Abstract:

    A systematic study was carried out to investigate the influence of linker geometry, Metal ionic radius as well as the nature of the counter ions on the structure formation of Metal tetraPhosphonates. Two tetraphosphonic acids p- and m-(H2O3PCH2)2N-CH2-C6H4-CH2-N(CH2PO3H2)2, six Metal ions (Ca2+, Mn2+, Co2+, Ni2+, Zn2+, and Cd2+) and two different counter ions (Cl− and NO3−) were employed using high throughput methods. Microwave (MW)-assisted heating led to the discovery of ten new Metal-Phosphonates which crystallize in three different crystal structures. The combination of direct methods and force field calculations allowed us to establish the crystal structures. The counter ion and the ionic radii of the Metal ions have a profound influence on the crystallinity and the formed crystal structure. All compounds were characterized in detail by thermogravimetric analyses, IR spectroscopy and magnetic susceptibility measurements. The proton conductivity of two selected compounds is also reported.

  • Chapter 3:High-throughput Methods for the Systematic Investigation of Metal Phosphonate Synthesis Fields
    Metal Phosphonate Chemistry, 2011
    Co-Authors: Palanikumar Maniam, Norbert Stock
    Abstract:

    The chapter will cover the investigation of the synthesis of Metal Phosphonates and alkylammonium Phosphonates using high-throughput (HT) methods. The first part of the chapter will be devoted to the description of HT methods for reactions in liquid media. It will cover the general methodology, the equipment used and the strategy to investigate complex systems. A summary of the advantages and disadvantages of using HT methods will also be given. In the other part of the chapter the application of the HT methods for the systematic investigation of complex synthesis fields will be demonstrated. Examples are given that focus on certain parameters, i.e. concentration, Metal salt, pH and temperature. The initial examples will concentrate on individual parameters while the last examples will discuss multi-parameter systems. These studies demonstrate the advantages of HT methods in respect to discovery, synthesis optimization and extraction of reaction trends.

  • inorganic organic hybrid compounds synthesis and characterization of three new Metal Phosphonates with similar characteristic structural features
    Journal of Solid State Chemistry, 2006
    Co-Authors: Sebastian Bauer, Thomas Bein, Norbert Stock
    Abstract:

    The phosphonocarboxylic acid H(HO{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH (H{sub 5} L ) was synthesized and characterized by NMR- and IR-spectroscopy, thermogravimetric (TG) analysis and single-crystal X-ray diffraction. Reactions of H{sub 5} L with samarium(III) chloride and calcium(II) chloride resulted in three new compounds, Sm[(O{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH].H{sub 2}O (1), Ca[H(O{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH].H{sub 2}O (2), and Ca[(HO{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH]{sub 2}.4H{sub 2}O (3). The single-crystal structure determination of the title compounds reveals that in H{sub 5} L as well as in compounds 1, 2, and 3 zwitterions are present. Within the M-O building units of the Metal Phosphonates we observed a different degree of dimensionality, depending on the oxidation state of the Metal ion and the synthesis conditions. In 1, one-dimensional chains of edge-sharing SmO{sub 8} polyhedra are observed while in 2, isolated units of edge-sharing CaO{sub 6} octahedra and in 3 isolated CaO{sub 6} octahedra are observed. However, looking at the organic part, the rigid phenyl carboxylic acid moieties arrange in a 'zipper-like' fashion and hydrogen bonding plays an important role in the stabilization of the crystal structure. The title compounds were further characterized by IR spectroscopy andmore » TG analysis. Additionally, the thermal stability of 1 was investigated by temperature-dependent X-ray diffraction. -- Graphical abstract: Hydrothermal reactions of the phosphonocarboxylic acid H(HO{sub 3}PCH{sub 2}){sub 2}NH-CH{sub 2}C{sub 6}H{sub 4}-COOH with Sm{sup 3+} and Ca{sup 2+} salts has led to three new inorganic-organic hybrid compounds. All crystal structures contain phosphonate zwitterions and have a layer-like arrangement. The rigid organic groups arrange in a 'zipper-like' fashion and hydrogen bonding plays an important role in the stabilization of the crystal structures.« less

Shengmin Hu - One of the best experts on this subject based on the ideXlab platform.

  • new layered Metal Phosphonates based on functionalized phosphonic acids
    Crystal Growth & Design, 2015
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of ZnII or MnII ion with 1-C10H7-CH2N(CH2COOH)(CH2PO3H2)(H3L1), 3-HOOC-C6H4-CH2N(CH2COOH)(CH2PO3H2)(H4L2), and 4-HOOC-C6H4-CH2N(CH2COOH)(CH2PO3H2)(H4L3) afforded six new layered Metal Phosphonates, namely, [Zn3(HL1)3]·3H2O (1), [Zn(HL1)]·CH3COOH (2), [Zn(H2L2)] (3), [Mn(H3L2)2] (4), [Mn(H3L3)2] (5), and [Zn(H2L3)]·H2O (6). Compounds 1–6 are characterized by single-crystal X-ray diffraction (XRD), powder XRD, IR spectroscopy, elemental analysis, and thermogravimetric analysis (TGA). In compounds 1–3 and 6, each [ZnO4] tetrahedron shares three corners with three neighboring [PCO3] tetrahedra to generate a Zn–O–P layer, which consists of eight and four member rings (MRs). While in compounds 4 and 5, each [MnO6] octahedron shares four corners with neighboring four [PCO3] tetrahedra into a Mn–O–P layer containing eight MRs. The organic groups hang on two sides of a Zn–O–P or Mn–O–P layer to form two-dimensional (2D) sandwich-like frameworks of compounds 1–6. TGA and powder XRD reveal tha...

  • syntheses crystal structures thermal stability magnetism and luminescence of four new Metal Phosphonates
    CrystEngComm, 2013
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of Cd2+, Mn2+, Co2+ and Ni2+ ions with 4-pyridyl-CH2N(CH2COOH)(CH2PO3H2) (H3L) afforded four new Metal Phosphonates, namely, (H3O)4[Cd7(L)6]·16H2O (1), (H3O)4[Mn7(L)6]·17H2O (2), [Co(HL)(H2O)]·2H2O (3) and [Ni(HL)(H2O)]·2H2O (4). Compounds 1 and 3 are isomorphous with compounds 2 and 4, respectively. Solid 1 is a 3D open-framework consisting of heptanuclear cadmium clusters. The framework of solid 1 is thermally stable up to 250 °C under an air atmosphere. In 3, HL2− anions exhibit pentadentate modes to combine Co2+ ions into a 2D hybrid layer. It is interesting that solid 1 displays bright blue luminescence, which can be enhanced upon cooling to 10 K. Furthermore, after heat-treatment at 250 °C under an air atmosphere, solid 1-250 also gives off blue emission. And the magnetic properties of 2–4 have also been studied.

  • new 3d Metal Phosphonates with bright tunable luminescence for the reversible sensing of nitrobenzene
    CrystEngComm, 2012
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Two isomorphous 3D Metal Phosphonates, [M2(H2L)] (M = Zn (1), Co (2); H6L = 1,4-((H2O3PCH2)(HOOCCH2)NCH2)2 C6H4, are reported; Solid 1 is stable up to 300 °C under an air atmosphere, displays bright tunable luminescence and offers reversible sensing of nitrobenzene.

  • syntheses crystal structures thermal stabilities and luminescence of two Metal Phosphonates
    CrystEngComm, 2012
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of Zn(II) or Pb(II) ions with 4-pyridyl-CH2N(CH2COOH)(CH2PO3H2) (H3L) afforded two Metal Phosphonates, namely, [Zn3(L)2]·2H2O (1) and [Pb3(L)2(H2O)2]·H2O (2). Compound 1 is a 3D pillared framework in which [ZnO4] tetrahedra and [ZnO3N2] trigonal-bipyramids are connected by L3− anions with heptadentate modes. In 2, L3− anions exhibit pentadentate modes to combine Pb(II) ions into a complicated 2D hybrid layer, resulting in the non-coordinated pyridine rings being sandwiched between the layers. Solid 1 is thermally stable up to 350 °C under an air atmosphere and displays bright purple–blue luminescence, and the luminescent intensity of the hydrated solid 1 can be weakened by nitrobenzene.

  • syntheses crystal structures thermal stabilities magnetism and luminescence of two 3d Metal Phosphonates
    CrystEngComm, 2011
    Co-Authors: Ruibiao Fu, Shengmin Hu, Xintao Wu
    Abstract:

    Hydrothermal reactions of ZnII or CuII ion with 1-hydroxyl-2-(3-pyridyl)ethylidene-1,1-diphosphonic acid (H4L) afforded two Metal Phosphonates, namely, [Zn2(L)(H2O)] (1) and [Cu4(L)2 (H2O)4]·(H2O)1.25 (2). In 1, [ZnO3N], [ZnO4] and [PO3C] tetrahedra are connected through corner-sharings to form a 3D framework with a 14MR ellipsoid-like channel. In 2, the [PO3C] tetrahedron also shares corners with a copper square-pyramid ([CuO4N], [CuO5]) into a hybrid layer, which is further pillared by L4− anion into a 3D neutral framework. Solid 1 is thermally stable up to 250 °C under an air atmosphere and displays UV luminescence. More interestingly, the dehydrated phase of 1 is selective and reversible for sensing of nitrobenzene. And the magnetic property of 2 has also been studied.