Crystal structure of complexes of bivalent Co,Ni, and Cd with anions of benzoic and 2-(acetylamino)-5-nitrobenzoic acids

The structure of three complexes of bivalent metals (cobalt, nickel, and cadmium) with anions of benzoic (HL ¹) and 2-(acetylamino)-5-nitrobenzoic (HL ²) acids, namely, [Co₂¹ (H₂O)₂(μ-C₄H₄N₂)] _n (I), [NiL²(H₂O)₅]L² · 2H₂O (II), and [Cd(μ-L ²)₂(H₂O)₂] _n · 2nH₂O (III), is determined. In chainlike structure I, cobalt atoms are connected by bridging pyrazine molecules; structure II contains isolated complexes. In structure III, centrosymmetric (CdOCO)₂ cycles and polymeric ribbons are formed due to the coordination of the carboxylate group of the L ² ligand to two cadmium atoms.     

1D Supramolecules Self-Assembled by Nickel(II) Macrocycles with Carboxylate Ligands

Abstract  

Three new macrocyclic nickel(II) supramolecules, {[Ni(L1)(Hmal)₂]} _n (1), {[Ni(L1)(Hdipic)₂]·(H₂O)₂·DMF} _n (2) and {[Ni(L1)(Hisoph)₂]·2DMF} _n (3) (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo [14,4,0^1.18,0^7.12]docosane, mal = maleate, dipic = 2,6-pyridinedicarboxylate, isoph = isophthalate), have been synthesized and characterized by analytical, spectroscopic and X-ray diffraction methods. The complexes 1–3 show that the central nickel(II) ions are coordinated axially by two monodentate carboxylate ligands, respectively. The structures of 1–3 extend their mononuclear structures to form 1D supramolecules through hydrogen bonds. In 3, each 1D chain interacts together to form a 2D layer through hydrogen bonds between the Hisoph ligands.     

Synthesis and Structure of a Silver(I) Complex {[Ag5(L)2(NO3)4](NO3)(CHCl3)2}n [L?=?2,3-bis(pyrimidine-2-thiomethyl)quinoxaline]

Abstract  The reaction of the dithioether ligand, 2,3-bis(pyrimidine-2-thiomethyl)quinoxaline (L) with AgNO₃, leads to the formation of a novel complex {[Ag₅(L)₂(NO₃)₄](NO₃)(CHCl₃)₂}n 1, which has been characterized by single-crystal X-ray diffraction analysis: monoclinic, space group C2/c, with a = 34.741(7), b = 9.930(2), c = 17.004(4) ?, β = 106.497(6)° and V = 5625(2) ?³.Complex 1 consists of 2D {[Ag₅(L)₂(NO₃)₄]⁺}n cations, uncoordinated anions and CHCl₃ solvent molecules. In 1, there exist three crystallographic independent Ag^I centers, which adopt different coordination geometries. There exist π–π stacking interactions in the complex and these weak interactions further stabilize the crystal structure in the solid state. The coordination feature of the ligand has been investigated by DFT calculations. Index Abstract  Synthesis and Structure of a Silver(I) Complex {[Ag₅(L)₂(NO₃)₄](NO₃)(CHCl₃)₂}_n [L = 2,3-bis(pyrimidine-2-thiomethyl)quinoxaline] Chao-Yan Zhang, Qian Gao, Ya-Bo Xie*, and Jian-Bo Feng The crystal structure of complex {[Ag₅(L)₂(NO₃)₄](NO₃)(CHCl₃)₂}n (L = 2,3-bis(pyrimidine-2-thiomethyl)quinoxaline) consists of 2D {[Ag₅(L)₂(NO₃)₄]⁺}n cations, uncoordinated anions and CHCl₃ solvent molecules. There exist three crystallographic independent Ag^I centers, which adopt different coordination geometries. The coordination feature of the ligand has been investigated by DFT calculations.      

Synthesis and Crystal Structure of a 1D Silver(I) Complex {[Ag (<Emphasis Type="Bold">L</Emphasis>)(CH<Subscript>3</Subscript>CN)](ClO<Subscript>4</Subscript>)}<Subscript>n</Subscript> [<Emphasis Type="Bold">L</Emphasis> = 5,6-dicyano-2,3-di(2-pyridyl)pyrazine]

Abstract The reaction of the organic ligand, 5,6-dicyano-2,3-di(2-pyridyl)pyrazine (L) with AgClO₄, leads to the formation of a novel complex {[Ag(L)(CH₃CN)](ClO₄)}n 1, which has been characterized by elemental analysis, IR and single-crystal X-ray diffraction analysis (monoclinic system, space group P2(1)/n, with a = 11.290(4), b = 12.660(5), c = 15.202(6) ?, β = 90.141(6)°, V = 13371(2) ?³ and Z = 4). The crystal structure of complex consists of polymeric chains of {[Ag(L)(CH₃CN)]⁺}n cations and anions. In the cation of 1, each Ag(I) center is coordinated to four N atoms from two symmetry-equivalent L ligands and a CH₃CN molecule. The adjacent two Ag(I) ions are linked by L ligands which adopt N₃-coordinated bridging mode to form a zig-zag chain. Index abstract Synthesis and Crystal Structure of a 1D Silver(I) Complex {[Ag (L)(CH₃CN)](ClO₄)}_n [L = 5,6-dicyano-2,3-di(2-pyridyl)pyrazine] Qian Gao, Ya-Bo Xie*, Sha Chen, and Dao Wang The crystal structure of complex {[Ag(L)(CH₃CN)](ClO₄)}_n (L = 5,6-dicyano-2,3-di(2-pyridyl)pyrazine) consists of polymeric chains of {[Ag(L)(CH₃CN)]⁺}_n cations and anions. Each Ag(I) center is coordinated to four N atoms from two symmetry-equivalent ligands and a CH₃CN molecule. The adjacent two Ag(I) ions are linked by ligands which adopt N₃-coordinated bridging mode to form a zig-zag chain.      

Synthesis and Crystal Structure of a Pure Inorganic Network Based Tetra-Sodium Capped Sandwich-Type Polyanion

Abstract  

The synthesis and single-crystal structure of a Na-salt compound Na₁₀[Co₄(OH₂)₂(AsW₉O₃₄)₂]·32H₂O (1) was reported. Compound 1 crystallizes in triclinic system, space group P−1, with the lattice parameters: a = 11.6040(10) ?, b = 12.9361(13) ?, c = 17.396(2) ?, α = 97.4120(10)°, β = 106.8590(10)°, γ = 111.867(2)° and Z = 1. Compound 1 consists of a pure inorganic network based on tetra-sodium capped sandwich-type anionic clusters [Co₄(OH₂)₂(AsW₉O₃₄)₂]¹⁰⁻ bridged through Na–OH₂ subunits. The thermogravimetric and electrochemistry measurements had also been studied.     

Synthesis and crystal structure of oxonitrate complexes Cs[VO2(NO3)2], Cs[MoO2(NO3)3], and MoO2(NO3)2

Cs[VO₂(NO₃)₂] (I), MoO₂(NO₃)₂ (II), and Cs[MoO₂(NO₃)₃] (III) complexes have been obtained by crystallization from nitric solutions and studied by single-crystal X-ray diffraction. Complexes I and II contain infinite zigzag chains of similar compositions, [VO₂(NO₃)₂]⁻ and [MoO₂(NO₃)₂], in which V and Mo atoms form, respectively, trigonal- and pentagonal-bipyramidal polyhedra. Each of these polyhedrons also contains one terminal and two bridge O atoms and two terminal NO₃ groups which are monodentate and bidentate in complexes I and II, respectively. Complex III has an island structure and consists of Cs⁺ cations and [MoO₂(NO₃)₃]⁻ anions, in which the Mo atom is surrounded by one bidentate NO₃ group and two monodentate NO₃ groups and two terminal O atoms in the cis-positions; oxygen atoms form a polyhedron in the form of distorted octahedron. According to the ab initio calculation of isolated MoO₂(NO₃)₂ molecules in the gas phase and solution, the coordination environment of the Mo atom, similarly to the Cr(VI) atom in CrO₂(NO₃)₂, is formed by two bidentate nitrate groups and two terminal O atoms (polyhedron- twisted trigonal prism).     

Synthesis and Characterization of Two Pb(II) Complexes of 2,2′-dihydroxy,Dimethoxy-1,1′-binaphthyl-3,3′-dicarboxylic Acid

Two new complexes {[Pb(L¹)(DMSO)₂(H₂O)]·DMF}_n (1, L¹ = 2,2′-dihydroxy-l,l′-dinaphthyl-3,3′-dicarboxylate) and {[Pb(L²)(DMS O)·DMSO}_n (2, L² = 2,2′-dimethoxy-l,l′-dinaphthyl-3,3′-dicarboxylate) have been synthesized under mild conditions and structurally characterized. Crystal structural analysis reveals that complex 1 adopts a 1D infinite chain structure which forms 2D sheet by hydrogen bonds interactions. Complex 2 possesses a 2D sheet structure, which was further assembled into a 3D supramolecular network through the π-π weak interactions. IR spectra indicates the carboxyl group coordinates with the Pb²⁺ ion. TGA shows that complex 2 is highly thermally stable up to 120°C.     

Structural features of 3d metal compounds with 1-hydroxyethylidenediphosphonic acid

Structural features of 3d metal complexes with anions of 1-hydroxyethylidenediphosphonic acid (HEDP, H₄ L), in which the M: HEDP ratios are equal to 1: 2, 1: 1, 3: 2, and 5: 2, are discussed. The Cu(II): HEDP = 1: 2 complexes are characterized by five types of structures: monomeric structures trans-[Cu(H_{4 ? n} L)₂(H₂O)₂]^{2 ? 2n} , cis-[Cu(H_{4 ? n} L)₂(H₂O)₂]^{2 ? 2n} , and [Cu(L)₂]^6?; the dimeric structure { [Cu(H₂ L)(H₂O)]₂(μ ₂-H₂ L)₂}^4? ; and the polymeric chain structure {[Cu(μ ₂-H₂ L)₂]^2?}_∞. Six coordination modes exhibited by HEDP in the Cu(II) compounds are described.     

Synthesis and X-ray crystal structure investigation of a potential boronate affinity chromatography ligando-boronobenzalmethoxyamine

A potential boronate affinity chromatography ligando-boronobenzalmethoxyamine (IV) and its precursor [o-formylbenzeneboronic acid (III)] were synthesized and characterized by three-dimensional single-crystal X-ray diffractometry. Both compounds contained no bonding between the boron atoms and the oxygen atoms [O(3)] of the distinguishing functional group. In addition,¹¹B NMR data confirmed the lack of any coordination between the boron and oxygen atoms in the boronic acid compoundsIII andIV and the catachol ester derivative (V) ofIV.o-Formylbenzeneboronic acid (III) crystallizes in space groupP2₁/n witha=3.883(1),b= 13.225(1),c=14.029(2) Å, =92.16(1)^o, and four molecules per unit cell.o-Boronobenzalmethoxyamine (IV) crystallizes in space group Pcen witha=14.158(2),b=17.156(1),c=7.734(2)Å, and eight molecules per unit cell. Selected bond distances and angles are tabularized.     

Nickel(II) and Cobalt(II) Complexes with Symmetrical Four-Dentate Ligands: Crystal Structures,Characterization, and Initial DNA Binding Mechanism Research

Abstract  

Four new nickel(II) and cobalt(II) complexes of Schiff base ligands: [Ni(L)Cl₂]·2H₂O (I), [Ni(L)(H₂O)₂] (NO₃)₂ (II), [Ni(L)(H₂O)₂] (ClO₄)₂ (III), and [Co(L) (H₂O)₂] (NO₃)₂ (IV) (L = 1,3-[bis(pyridine-2-imino)]propane) have been synthesized. The four complexes have been fully characterized by elemental analysis, IR, absorption spectra, emission spectra, and single-crystal X-ray diffraction analysis. The binding of the four complexes to calf thymus DNA (CT DNA) has been investigated by absorption spectra and emission spectra. The results of the two methods indicate that the action mode of complex I with DNA is intercalative mainly, and the action mode of complexes II, III, IV with DNA cannot be concluded, it should be sustained by other experimental measurements.     

Synthesis and crystal structure of a 2D (6,3) coordination network, {[Ag(L)1.5]NO3} n [L = 1,3-bis(benzylthio)propane]

A new dithioether silver(I) complex, {[Ag(L)_1.5]NO₃} _n (1) has been prepared by the reaction of AgNO₃ with 1,3-bis(benzylthio)propane (L) in methanol/chloroform. The structure was characterized by single-crystal X-ray diffraction analysis: rhombohedral system, space group R –3c, with a =b = 15.651(7), c = 39.26(4) Å, V = 8328(1) ų, and Z = 6. The crystal structure consists of [Ag(L)_1.5]⁺ cations and NO₃ ^– anions. In 1, each silver(I) center is coordinated equivalently to three sulfur donors from three different ligands to give a trigonal-planar coordination geometry. Each L links two adjacent silver(I) centers in bis-monodentate bridging mode to form a 2D (6,3) network sheet. Furthermore, these 2D sheets are linked by the weak coordination interactions between nitrate ions and silver(I) atoms to form a 3D brick-wall framework.     

Synthesis and structure of zirconium and 3d-transition metal phosphates M 0.5Zr2(PO4)3(M = Mn, Co, Ni, Cu, Zn)

Double zirconium and 3d-transition metal phosphates of the compositions M 0.5Zr2(PO4)3[M = Mn (I), Co (II), Ni (III), Cu (IV), Zn (V)] have been synthesized and the types of their structures have been refined. Compounds I, II, III, IV, and V are all monoclinic (sp. gr. P2₁/n, Z = 4) and have the unit cell parameters a = 12.390(3), 12.389(3), 12.385(3), 12.389(3), 12.389(2) Å; b = 8.931(4), 8.928(3), 8.924(4), 8.925(4), 8.929(3) Å; c = 8.843(3), 8.840(2), 8.840(3), 8.841(3), 8.842(2) Å, β = 90.55(1), 90.54(1), 90.53(1), 90.53(1), 90.54(1)°; V = 978.5, 977.7, 977.0, 977.4, 978.1 ų, respectively. All the structures have the {[Zr₂(PO₄)₃]^?}3_∞-type frameworks. The crystallographic data for 3d-transition and alkali earth metal phosphates described by the general formula M _0.5Zr₂(PO₄)₃ are compared.     

Synthesis, Characterization and Crystal Structure of a New One-Dimensional Heterobimetallic Coordination Polymer Based on [(Tp)Fe(CN)3]?

Abstract  

By using a pre-designed anionic precursor [TpFe^III(CN)₃]⁻ (Tp = hydrotris(pyrazolyl)borate) as a structural building block, a new cyanide-bridged one-dimensional heterobimetallic coordination polymer, [(Tp)₂Fe₂^III(CN)₆Zn·2H₂O] _n (I) has been prepared and characterized by X-ray single crystal diffraction, M?ssbauer and magnetic experiments. Complex I crystallizes in the orthorhombic Ibam space group with a = 14.4094(8) ?, b = 18.3003(10) ?, c = 12.9855(7) ? and consists of rhombic chains, in which the [TpFe^III(CN)₃]⁻ unit acts as a bridging bidentate ligand toward two Zn²⁺ atoms through two of its three cyanide groups.     

Synthesis and Crystal Structure of a New Dinuclear Holmium(III) Complex with a Bulky Anthracene-Based Carboxylate Ligand

Abstract  

The reaction of Ho(NO₃)₃ with the bulky anthracene-9-carboxylic acid (HL) and 1,10-phenanthroline (phen) in the presence of 2,6-dimethylpyridine afforded a dinuclear Ho^III complex [Ho₂(L)₆(phen)₂] (1) (L = anthracene-9-carboxylate), which was characterized by elemental analysis and single-crystal X-ray diffraction analysis (triclinic system, space group Pī, with a = 12.4994(3), b = 13.3556(3), c = 14.9751(3) ?, α = 110.7630(1), β = 103.0680(1), γ = 106.8530(1)°, V = 2080.59(9) ?³, and Z = 1). Complex 1 has a centrosymmetric binuclear cage structure in which two Ho^III atoms are both nine-coordinated and bridged by four bulky anthracnene-9-carboxylate (L) ligands with a non-bonding Ho∙∙∙Ho separation of 3.9076 (2) ?. The anthracene-9-carboxylate groups coordinate each Ho^III atom in three different ways. The adjacent discrete dinuclear subunits are arranged into a one-dimensional (1D) chain along the [111] direction by intermolecular π···π stacking interactions, with the centroid–centroid separation of 3.724(2) ?.     

Syntheses and Crystal Structures of a Series of Manganese-Lanthanide-Sodium 12-Metallacrown-4 Dimers

A series of heterotrimetallic manganese-lanthanide-sodium dimer metallacrowns has been synthesized and characterized by single-crystal X-ray analysis: {LnNa[12-MC_{Mn(III)N(shi)}-4]}₂(iph)₄, where Ln^III?=?La (1), Ce (2), Pr (3), Nd (4), Sm (5), Eu (6), Gd (7), Tb (8), Dy (9), Ho (10), Er (11), Tm (12), Yb (13), Lu (14), and Y (15); MC is metallacrown; shi^3? is salicylhydroximate; and iph^2? is isophthalate. The manganese(III) ions and shi^3? ligands generate the 12-MC-4 framework with one Ln^III and Na⁺ ion bound to each [12-MC_{Mn(III)N(shi)}-4] on opposite sides of the central MC cavity. The carboxylate groups of the isophthalate ligands bridge between the central Ln^III ion and each ring Mn^III ion, and the meta-arrangement of the carboxylate groups joins two LnNa[12-MC_{Mn(III)N(shi)}-4] units together to form the dimer through the Ln^III ions, which reside on the interior of the molecule. The identity of the central Ln^III ion slightly impacts the size the [12-MC_{Mn(III)N(shi)}-4] framework. As the crystal radius of the Ln^III ion increases from Lu^III (1.02 Å) to La^III (1.19 Å), the 12-MC-4 framework expands to accommodate the larger Ln^III ion as the MC cavity increases in size (0.53 Å for Lu^III to 0.58 Å for La^III) and the average cross cavity Mn^III-Mn^III and oxime oxygen-oxime oxygen distances also increase (Mn^III-Mn^III distances: 6.48 Å for Lu^III to 6.52 Å for La^III; O_oxime-O_oxime distances: 3.66 Å for Lu^III to 3.75 Å for La^III). In addition, the larger Ln^III ions reside further from the MC cavity as indicated by the Ln^III-oxime oxygen mean plane (O_oxMP) distance. The Ln^III-O_oxMP distance steadily decreases from La^III (1.7527(12) Å) to Lu^III (1.5575(15) Å).

Graphic Abstract

The complex {LaNa[12-MC_{Mn(III)N(shi)}-4]}₂(iph)₄(DMF)₆(H₂O)₂ is a dimer of [12-MC-4] molecules linked by four isophthalate anions

     

Syntheses and Crystal Structures of Two CuII Coordination Isomers [Cu(pmt)2] · 4H2O (1) and {[Cu(pmt)2] · 2H2O} n (2)

Abstract  A pair of Cu^II coordination isomers [Cu(pmt)₂] · 4H₂O (1) and {[Cu(pmt)₂] · 2H₂O} _n (2) [Hpmt = 2-(2-pyridylmethylamino) ethanesulfonic acid] have been prepared by reaction of the same proportion CuCl₂ · 2H₂O and Hpmt but with different experimental methods in water–methanol mixed solution, and were characterized by X-ray diffraction, elemental analysis, IR spectrum. X-ray analysis indicates that complex (1) is a mononuclear complex in which two deprotonated pmt ligands coordinate in a facial tridentate arrangement about the Cu^II atom. While complex (2) is a coordination polymer, in which four N atoms of pmt ligands coordinate to one Cu^II atom but its sulfonate O atoms bond to adjacent Cu^II atom. Thus 12-membered rings (–Cu–N–C–C–S–O–)₂ are obtained between two neighbouring Cu^II atoms and they connect one another to form this new polymer. Crystal data: [Cu(pmt)₂] · 4H₂O (1), Mr = 566.10, monoclinic, P2 ₁/c, a = 9.1950(8) ?, b = 11.5093(10) ?, c = 11.2304(10) ?, β  = 105.5550(10)°, Z = 2, V = 1144.96(17) ?³, R ₁  = 0.0407, wR ₂  = 0.1242 [I > 2σ (I)]; {[Cu(pmt)₂] · 2H₂O} _n (2), Mr = 530.07, triclinic, P-1, a = 7.6165(19) ?, b = 8.806(2) ?, c = 9.592(4) ?, α = 104.933(4)°, β = 106.732(4)°, γ = 109.503(3)°, Z = 1, V = 534.2(3) ?³, R ₁ = 0.0470, wR ₂ = 0.1082 [I > 2σ(I)]. Index Abstract  A pair of Cu^II coordination isomers [Cu(pmt)₂] · 4H₂O (1) and {[Cu(pmt)₂] · 2H₂O} _n (2) [Hpmt = 2-(2-pyridylmethylamino) ethanesulfonic acid] have been prepared by reaction of the same proportion CuCl₂ · 2H₂O and Hpmt but with different experimental methods in water–methanol mixed solution.      

Synthesis,Crystal Structure,and Properties of Two Zinc Tubular Coordination Polymers Based on Fluconazole

Two Zn(II)-containing complexes based on fluconazole, {[Zn(HFlu)₂(IPA)]·9H₂O}_n (1), {[Zn(HFlu)₂(OH-BDC)]·8H₂O}_n (2) (HFlu = fluconazole; 2-(2,4-difluoro- phenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol; H₂IPA = isophthalic acid; OH-H₂BDC = 5-hydroxyisophthalic acid) have been synthesized and structurally characterized. Complex 1 and 2 are both a one-dimensional (1D) tubular structure with the distorted dinuclear zinc rectangular-shaped cavity, and large free water molecules involved in strong O?H···O and O?H···N hydrogen bonds are accommodated in the 1D tubular structure. The thermal stabilities and photoluminescent properties of the coordination polymers have also been investigated.     

Crystal structure of R[UO2(CH3COO)3] (R = NH 4+ , K+, or Cs+)

The single crystal structure of NH₄[UO₂(CH₃COO)₃] (I), K[UO₂(CH₃COO)₃] (II), and Cs[UO₂(CH₃COO)₃] (III) is studied by X-ray diffraction. I and II crystallize in the tetragonal crystal system. The crystal data are as follows: a = 13.6985(3) and c = 27.5678(14) ?, V = 5173.1(3) ?³, space group I4₁/a, Z = 16, and R = 0.023 for I; a = 13.8890(5) and c = 26.0839(18) ?, V = 5031.7(4) ?³, space group I4₁/a, Z = 16, and R = 0.037 for II. Crystals III are orthorhombic, a = 18.176(2), b = 13.119(2), and c = 22.088(4) ?, V = 5267(1)?³, space group Pbca, Z = 16, and R = 0.0424. In structures I–III, the uranium-containing structural units are represented by discrete mononuclear [UO₂(CH₃COO)₃]⁻ groups, which belong to the AB ₃⁰¹ (A = UO₂²⁺, B ⁰¹=CH₃COO⁻) crystal chemical group of uranyl complexes.     

Palladium (II) compounds with diaminocarboxylic acids: Crystal structures of [Pd(H2Cdta)] · H2O, [Pd(H3Edtp)Cl] · 2H2O, and (H6Edtp)[PdCl4] · 4H2O

The crystal structures of three Pd(II) compounds with diamine tetracarboxylates in different protonation states are determined, namely, [Pd(H₂ Cdta)] · H₂O (I), [Pd(H₃ EdtpCl] · 2H₂O (II), and (H₆ Edtp)[PdCl₄] · 4H₂O (III) (R ₁ = 0.0230, 0.0313, and 0.0277 for 3040, 3377, and 3809 reflections with I > 2σ(I) for I–III, respectively). Crystals I and II are built of neutral complexes [Pd(H₂ Cdta)] and [Pd(H₃ Edtp)Cl], respectively, and crystallization water molecules. Crystal III consists of [PdCl₄]²⁻ anionic complexes, H₆ Edtp ²⁺ cations, and water molecules. In I, one of the protonated acetate groups of the H₂ Cdta ²⁻ ligand forms a very weak additional Pd-O bond [2.968(2) Å] over the 2N + 2O coordination square. In II and III, the protonated propionate groups of the H₃ Edtp ⁻ ligand and the H₆ Edtp ²⁺ cation are not involved in Pd coordination and the coordination squares consist of the 2N + O + Cl and 4Cl atoms, respectively. __________ Translated from Kristallografiya, Vol. 48, No. 2, 2003, pp. 278–282. Original Russian Text Copyright ? 2003 by Polyakova, Poznyak, Sergienko.     

Hydrothermal Synthesis,Crystal Structure,and Luminescence Property of Two Lanthanide Coordination Polymers with Diglycolic Acid

Abstract  Two new coordination polymers {[Tb₂(C₄H₄O₅)₃ · 4H₂O] · 2H₂O} _n (1) and {[La₂(C₄H₄O₅)₃ · 3H₂O] · 3H₂O} _n (2) (C₄H₄O₅ ²⁻ = diglycolato) were prepared by hydrothermal reaction and characterized by X-ray crystallography. The two complexes have different network structures through carboxylate oxygen atoms and ether oxygen atoms from diglycolato ligands linking lanthanide ions. The characteristic transition bands ⁵D₄ → ⁷F_J (J = 6 − 3) of Tb(III) ion are observed in complex 1. Graphical Abstract  Two new coordination polymers {[Tb₂(C₄H₄O₅)₃ · 4H₂O] · 2H₂O} _n (1) and {[La₂(C₄H₄O₅)₃ · 3H₂O] · 3H₂O} _n (2) (C₄H₄O₅ ²⁻ = diglycolato) have network structures through the carboxylate oxygen atoms and ether oxygen atoms from diglycolato ligands. The emission spectrum of complex 1 indicates the ⁵D₄ → ⁷F_J (J = 6 − 3) transitions of Tb(III) ion.