scholarly journals Synthesis, Structure, and Thermal Stability of Supramolecular Polymers with 1D Chain: [M(BPP)2(TBTA)(H2O)2]n[M=Mn(1),Co(2)]

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Yan Liu ◽  
Ling-Ling Gao ◽  
Xu-Yan Lv ◽  
Jian-Feng Liu ◽  
Tuo-Ping Hu
Keyword(s):  
Complex Compounds ◽  
Supramolecular Polymers ◽  
Triclinic Crystal System ◽  
X Ray ◽  
Carboxylate Groups ◽  
Distorted Octahedral ◽  
1D Chain ◽  
Thermal Stability Of ◽  
1D Chains ◽  
Octahedral Configuration

Two supramolecular polymers [M(BPP)2(TBTA)(H2O)2]n[M=Mn(1),Co(2)] have been constructed from 2,3,5,6-tetrabromoterephthalic acid (H2TBTA) and 1,3-bis(4-pyridyl)propane (BPP) ligands in water-methanol dissolvant. Single-crystal X-ray and powder diffraction, IR spectroscopy, thermogravimetric analysis, and elemental analysis were employed to characterize all samples. Both of the complex compounds 1 and 2 belong to triclinic crystal system with P-1 space group. The crystal structures analysis indicates that the metal atom coordinated by two carboxylate groups from different TBTA ligands, two BPP, molecules and two H2O molecules formed a slightly distorted octahedral configuration. The compounds of 1 and 2 are 1D chains made with TBTA spacers, BPP molecules, and H2O molecules.

scholarly journals Threefold Spiral Structure Constructed by 1D Chains of [[M(NCS)2(bpa)2]·biphenyl]n (M = Fe, Co; bpa = 1,2-bis(4-pyridyl)ethane)

Crystals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 97 ◽  
Author(s):  
Satoshi Tokinobu ◽  
Haruka Dote ◽  
Satoru Nakashima
Keyword(s):  
Spin Crossover ◽  
Spiral Structure ◽  
Diffusion Method ◽  
Central Metal ◽  
X Ray ◽  
Pyridine Complex ◽  
1D Chain ◽  
One Step ◽  
Spiral Structures ◽  
1D Chains

Assembled complexes [[M(NCS)2(bpa)2]·biphenyl]n (M = Fe, Co; bpa = 1,2-bis(4-pyridyl)ethane) have been synthesized because [Fe(NCBH3)2(bpa)2·biphenyl]n has a novel threefold spiral structure and shows stepwise spin-crossover phenomenon. We attempted to obtain spiral structures for [[Fe(NCS)2(bpa)2]·biphenyl]n and [[Co(NCS)2(bpa)2]·biphenyl]n using a one-step diffusion method, while the reported spiral structure of [[Fe(NCBH3)2(bpa)2]·biphenyl]n was obtained by diffusion method after synthesizing Fe(II)-pyridine complex. X-ray structural analysis revealed that [[Fe(NCS)2(bpa)2]·biphenyl]n and [[Co(NCS)2(bpa)2]·biphenyl]n had a chiral propeller structure of pyridines around the central metal, and they had a novel spiral structure and chiral space group P3121 without the presence of chiral auxiliaries. It was shown that the host 1D chain, having a chiral propeller structure of pyridines around the central metal along with its concerted interaction with an atropisomer of biphenyl, made a threefold spiral structure.

Synthesis, Crystal Structure and Luminescence Property on Cabazoly-Based Zinc Metal Organic Frameworks

2017 ◽  
Vol 727 ◽  
pp. 628-634
Author(s):  
Ying Jie Zhang ◽  
Li Xian Sun ◽  
Fen Xu
Keyword(s):  
Crystal Structure ◽  
Metal Organic Frameworks ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zinc Metal ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral ◽  
1D Chain ◽  
Metal Organic ◽  
Metal Charge Transfer

A novel zinc metal organic frameworks, named ZnL(2,2′-bpy), has been successfully synthesized, serving 3,6-dicarboxylic-9-ethylcarbazole acid (H2L) as ligand. This kind of ZnMOFs was characterized by FI-IR, elemental analysis, SEM, powder X-ray diffraction and single crystal X-ray diffraction to illustrate the structures. TG analysis was applied to investigate the thermostability. Structural analysis demonstrates that ZnMOFs possess triclinic crystal structure which is a 1D chain that occurs distorted-octahedral coordination geometry. Furthermore, the luminescent performance of ZnMOFs is performed and discussed in detail. The results show that ZnMOFs can emit blue luminescence originating, which is assigned to the ligand-to-metal charge transfer (LMCT).

Solvatomorphism and Electronic Communication in FeIII N,N-Bis(salicylidene)-1,3-propanediamine Dimers

2015 ◽  
Vol 68 (5) ◽  
pp. 766 ◽  
Author(s):  
Jitnapa Sirirak ◽  
David J. Harding ◽  
Phimphaka Harding ◽  
Lujia Liu ◽  
Shane G. Telfer
Keyword(s):  
High Spin ◽  
Large Distance ◽  
Electronic Communication ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Electrochemical Studies ◽  
X Ray ◽  
Distorted Octahedral ◽  
1D Chains

The reaction of H2salpn (H2salpn = N,N′-bis(salicylidene)-1,3-propanediamine) with Fe(ClO4)3 in a ratio of 1 : 1 and 3 : 2, leads to dark red crystals of the solvatomorphs [(salpn)Fe(μ2-salpn)Fe(salpn)]·0.5MeOH (1) and [(salpn)Fe(μ2-salpn)Fe(salpn)]·MeOH (2), respectively. X-Ray crystallographic studies reveal a slightly distorted octahedral geometry and meridional configuration of the N and O donor atoms with one of the salpn ligands acting as a bridge between the two FeIII atoms to create a dimer. The Fe–N/O bond distances for both dimers indicate that the Fe centres are high spin. Supramolecular dimeric pairs are formed in both structures from C–H···π and/or C–H···O interactions. However, the degree of solvation significantly impacts the arrangements of these dimeric pairs with tightly packed 1D chains in 2 and more loosely packed chains in 1. In addition, electrochemical studies reveal weak communication between the two Fe atoms despite the large distance between them and the lack of conjugation across the bridge.

Structure and Stability of a Linear Trinuclear Cobalt(II) Complex: Co3(PhCH=CHCO2)6(bpy)2

2008 ◽  
Vol 63 (2) ◽  
pp. 129-133 ◽  
Author(s):  
Xian-Wen Wang ◽  
Ying Chen ◽  
Jing-Zhong Chen ◽  
Jian-Hong Liu ◽  
Lei Han
Keyword(s):  
X Ray Diffraction ◽  
Linear Arrangement ◽  
Triclinic Space Group ◽  
X Ray ◽  
Cell Parameters ◽  
Hydrogen Bonding Interactions ◽  
Octahedral Environment ◽  
Carboxylate Groups ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

A trinuclear cobalt(II) complex, [Co3(PhCH=CHCO2)6(bpy)2] (1) (bpy = 2,2-bipyridine), was synthesized and structurally characterized by single crystal X-ray diffraction. Complex 1 crystallizes in the triclinic space group P1 with cell parameters: a = 11.347(6), b = 11.471(6), c = 14.247(8) Å , α = 69.503(9), β = 74.211(9), γ = 76.812(11)°, V = 1653.2(15) Å3, Z = 1, and R1(F) = 0.026, wR2(F2) = 0.138. Complex 1 has a linear arrangement of three Co(II) centers bridged by six cinnamate carboxylate groups, four of which function in a bidentate syn-syn fashion linking the peripheral Co2 atoms, and two as both bidentate bridging and bidentate chelating units. The Co1 atom is located on a crystallographic inversion center and exhibits a slightly distorted octahedral coordination geometry, while the terminal Co atoms (Co2 and Co2#1) have a significantly distorted octahedral environment. Hydrogen bonding interactions and π-π stacking interactions stabilize the structure

Study on Crystal Structure and Thermal Stability of Hexaaquanickel (II) Bis[4-amino-3-methyl-benzenesulfonate]

2013 ◽  
Vol 643 ◽  
pp. 64-67
Author(s):  
Li Hua Wang
Keyword(s):  
Self Assembly ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Complex Molecules ◽  
X Ray ◽  
Dimensional Network ◽  
Distorted Octahedral ◽  
Coordinated Water ◽  
Light Green ◽  
Thermal Stability Of

Light green crystals of the Ni (II) complex material, [Ni(H2O)6](C14H16N2O6S2), were obtained by the self-assembly of Ni(H2O)6·6H2O, 4-amino-3-methyl-benzenesulfonic acid and NaOH. The result of X-ray diffraction shows that each Ni (II) atom is six-coordinated in a distorted octahedral environment by six oxygen atoms from the water molecules. The complex molecules are connected by hydrogen bonds to form two dimensional network structure. The thermal analysis shows that the complex has a enothermic peak at 302 C, indicating that coordinated water molecules are in the complex.

Synthesis and Crystal Structure of a New 3D Copper B-Paradodecatungstate Compound: [Na2(H2O)8][Na8(H2O)20][Cu(en)2][W12O42] · 3H2O

2009 ◽  
Vol 64 (3) ◽  
pp. 269-273 ◽  
Author(s):  
Xiuhong Xu ◽  
Fang Luo ◽  
Weihong Luo ◽  
Ji Chen
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Ir Spectroscopy ◽  
Complex Cation ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
1D Chain ◽  
3D Framework ◽  
1D Chains

A new polyoxotungstate complex [Na2(H2O)8][Na8(H2O)20][Cu(en)2][W12O42] ・3H2O (1) (en = ethylenediamine) has been synthesized in aqueous solution and characterized by elemental analysis, IR spectroscopy and TG analysis, together with a single crystal X-ray diffraction study. In compound 1, the Cu(en)22+ complex cation links the [W12O42]12− anions to form a 1D chain, and the 1D chains are further interconnected with Na8(H2O)208+ and Na2(H2O)82+ cations to construct a new 3D framework.

scholarly journals Thermal and spectral properties of di-and trimethoxybenzoates of silver (I)

2018 ◽  
Vol 34 (1) ◽  
pp. 63
Author(s):  
Agnieszka Dziewulska-Kułaczkowska ◽  
Wieslawa Ferenc
Keyword(s):  
Thermal Stability ◽  
Spectral Properties ◽  
Room Temperature ◽  
Solubility In Water ◽  
X Ray ◽  
Carboxylate Groups ◽  
Monodentate Ligands ◽  
Low Symmetry ◽  
Thermal And Spectral Properties ◽  
Thermal Stability Of

The complexes of silver(I) with 2,3-, 2,4-, 2,6-, 3,4-, 3,5-dimethoxy-, and 2,3,4- and 3,4,5-trimethoxybenzoic acid anions have been synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric and X-ray studies. Their solubility in water has been also determined at 293K. All analysed complexes were found to be crystalline, anhydrous compounds with low symmetry. The carboxylate groups act as bidentate or monodentate ligands. The thermal stability of compounds has been examined in air in temperature range of 293-1173K. The analysed complexes were found to be stable at room temperature and their solubilities in water at 293K to be in the order of 10-4 mol.dm-3.

syn and anti conformations in 2-hydroxy-5-[(E)-(4-nitrophenyl)diazenyl]benzoic acid and two related salts

2014 ◽  
Vol 70 (5) ◽  
pp. 493-497 ◽  
Author(s):  
Alexandr V. Yatsenko ◽  
Ksenia A. Paseshnichenko
Keyword(s):  
Density Functional Theory ◽  
Benzoic Acid ◽  
Density Functional ◽  
X Ray Diffraction ◽  
Functional Theory ◽  
X Ray ◽  
Octahedral Environment ◽  
Carboxylate Groups ◽  
Distorted Octahedral ◽  
Benzene Rings

The crystal structures of 2-hydroxy-5-[(E)-(4-nitrophenyl)diazenyl]benzoic acid, C13H9N3O5, (I), ammonium 2-hydroxy-5-[(E)-phenyldiazenyl]benzoate, NH4 +·C13H9N2O3 −, (II), and sodium 2-hydroxy-5-[(E)-(4-nitrophenyl)diazenyl]benzoate trihydrate, Na+·C13H8N3O5 −·3H2O, (III), have been determined using single-crystal X-ray diffraction. In (I) and (III), the phenyldiazenyl and carboxylic acid/carboxylate groups are in an anti orientation with respect to each other, which is in accord with the results of density functional theory (DFT) calculations, whereas in (II), the anion adopts a syn conformation. In (I), molecules form slanted stacks along the [100] direction. In (II), anions form bilayers parallel to (010), the inner part of the bilayers being formed by the benzene rings, with the –OH and –COO− substituents on the bilayer surface. The NH4 + cations in (II) are located between the bilayers and are engaged in numerous N—H...O hydrogen bonds. In (III), anions form layers parallel to (001). Both Na+ cations have a distorted octahedral environment, with four octahedra edge-shared by bridging water O atoms, forming [Na4(H2O)12]4+ units.

Synthesis, crystal structure and magnetic properties of a one-dimensional Mn2+ complex constructed from (+)-dibenzoyltartaric acid and 2,2′-bipyridine

2021 ◽  
Vol 77 (11) ◽  
Author(s):  
Yuan Jiao ◽  
Fu-Ning Jin ◽  
Si-Si Feng ◽  
Ai Wang ◽  
Ulli Englert
Keyword(s):  
Magnetic Properties ◽  
Self Assembly ◽  
Zero Field ◽  
X Ray Diffraction ◽  
Zero Field Splitting ◽  
Orthorhombic Space Group ◽  
Distorted Octahedral ◽  
1D Chain ◽  
Coordinated Water ◽  
Thermal Stability Of

The self-assembly reaction of (+)-dibenzoyltartaric acid (D-H2DBTA) with 2,2′-bipyridine (bpy) and Mn(CH3CO2)2·4H2O yielded a new coordination polymer, namely, catena-poly[[[diaqua(2,2′-bipyridine-κ2 N,N′)manganese(II)]-μ-2,3-bis(benzoyloxy)butanedioato-κ2 O 2:O 3] dihydrate], {[Mn(C18H12O8)(C10H8N2)(H2O)2]·2H2O} n or {[Mn(DBTA)(bpy)(H2O)2]·2H2O} n , (I). Complex (I) has been characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis (TGA) and single-crystal and powder X-ray diffraction. It crystallizes in the orthorhombic space group P212121. In the complex, the Mn2+ cation displays a distorted octahedral {MnO4N2} geometry, formed from two carboxylate O atoms of two DBTA2− ligands, two cis-oriented N atoms from one chelating 2,2′-bipyridine ligand and two trans-oriented O atoms from coordinated water molecules. The polymer displays a 1D chain with an Mn...Mn distance of 9.428 (1) Å. Due to the presence of flexible polycarboxylate and rigid bipyridyl ligands in the molecular structure, a high thermal stability of the complex is attained. The magnetic properties of (I) were analyzed based on the mononuclear Mn2+ model due to the long intramolecular Mn...Mn distance. The zero field splitting (ZFS) contribution in the high-spin Mn2+ cation is almost negligible and there are weak antiferromagnetic couplings between 1D chains [zJ′ = −0.062 (5) cm−1], corresponding to an intermolecular Mn...Mn distance of 7.860 (2) Å.

scholarly journals Crystal Structure and Thermal Behavior of Two New Supramolecular Complexes Templated with 1,2,4,5-Benzenetetracarboxylic Acid

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Ling-Ling Gao ◽  
Yan Liu ◽  
Xu-Yan Lv ◽  
Jian-Feng Liu ◽  
Tuo-Ping Hu
Keyword(s):  
Metal Ion ◽  
Supramolecular Complex ◽  
Supramolecular Complexes ◽  
Water Molecules ◽  
Monoclinic Crystal System ◽  
X Ray Diffraction ◽  
Monoclinic Crystal ◽  
X Ray ◽  
Distorted Octahedral ◽  
Octahedral Configuration

Templated coordination polymers [Ni(H2O)4(bipy)](BTA)0.5·H2O (1) and [Co(H2O)4(bipy)](BTA)0.5·H2O (2) (bipy = 4,4′-Bipyridine, H4BTA = 1,2,4,5-Benzenetetracarboxylic Acid) were synthesized and characterized by single-crystal X-ray diffraction, powder diffraction, elemental analysis, IR, and thermogravimetric analysis. Both of complexes 1 and 2 are monoclinic crystal system, C2/c space group, and isostructural. The unit of the structure, the metal ion is coordinated by four water molecules and two bipy molecules, is a slightly distorted octahedral configuration, and the carboxyl group from BTA4- ion doesn't coordinate with the metal ion, the H-bonding interactions further connect the mononuclear molecules to generate a 3D supramolecular complex.

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