scholarly journals Single ion magnet behaviour in a two-dimensional network of dicyanamide-bridged cobalt(ii) ions

2015 ◽  
Vol 44 (7) ◽  
pp. 2989-2992 ◽  
Author(s):  
Joanna Palion-Gazda ◽  
Tomasz Klemens ◽  
Barbara Machura ◽  
Julia Vallejo ◽  
Francesc Lloret ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Low Temperatures ◽  
Slow Relaxation ◽  
Two Dimensional ◽  
Dimensional Network

The 2D coordination polymer of dca-bridged cobalt(ii), [Co(dca)2(atz)2]n, exhibits slow relaxation of the magnetization at low temperatures being thus a new example of single-ion magnet (SIM).

Poly[deca-μ2-cyanido-dicyanidobis(μ2-ethylenediamine)bis(ethylenediamine)tricadmium(II)dicobalt(III)]: a two-dimensional coordination polymer

2009 ◽  
Vol 65 (3) ◽  
pp. m118-m120
Author(s):  
Olha Sereda ◽  
Helen Stoeckli-Evans
Keyword(s):  
Coordination Polymer ◽  
Network Structure ◽  
General Position ◽  
Rotation Axis ◽  
Three Dimensional ◽  
The Other ◽  
Dimensional Structure ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
Dimensional Network

The title coordination polymer, [Cd3Co2(CN)12(C2H8N2)4]n, has an infinite two-dimensional network structure. The asymmetric unit is composed of two crystallographically independent CdIIatoms, one of which is located on a twofold rotation axis. There are two independent ethylenediamine (en) ligands, one of which bis-chelates to the Cd atom that sits in a general position, while the other bridges this Cd atom to that sitting on the twofold axis. The Cd atom located on the twofold rotation axis is linked to four equivalent CoIIIatomsviacyanide bridges, while the Cd atom that sits in a general position is connected to three equivalent CoIIIatomsviacyanide bridges. In this way, a series of trinuclear, tetranuclear and pentanuclear macrocycles are linked to form a two-dimensional network structure lying parallel to thebcplane. In the crystal structure, these two-dimensional networks are linkedviaN—H...N hydrogen bonds involving an en NH2H atom and a cyanide N atom, leading to the formation of a three-dimensional structure. This coordination polymer is only the second example involving a cyanometallate where the en ligand is present in both chelating and bridging coordination modes.

ZnIIand CuIIcomplexes generated from 5-(pyridin-4-yl)-3-[2-(pyridin-4-yl)ethyl]-1,3,4-oxadiazole-2(3H)-thione

2013 ◽  
Vol 69 (7) ◽  
pp. 716-720 ◽  
Author(s):  
Hang-Ju Zhao ◽  
Jian-Ping Ma ◽  
Qi-Kui Liu ◽  
Yu-Bin Dong
Keyword(s):  
Coordination Polymer ◽  
Stacking Interactions ◽  
The Novel ◽  
Two Dimensional ◽  
Compound I ◽  
Coordination Environment ◽  
Dimensional Network ◽  
Solvent Molecules ◽  
Compound Ii ◽  
Nitrate Anions

A new 1,3,4-oxadiazole-containing bispyridyl ligand, namely 5-(pyridin-4-yl)-3-[2-(pyridin-4-yl)ethyl]-1,3,4-oxadiazole-2(3H)-thione (L), has been used to create the novel complexes tetranitratobis{μ-5-(pyridin-4-yl)-3-[2-(pyridin-4-yl)ethyl]-1,3,4-oxadiazole-2(3H)-thione}zinc(II), [Zn2(NO3)4(C14H12N4OS)2], (I), andcatena-poly[[[dinitratocopper(II)]-bis{μ-5-(pyridin-4-yl)-3-[2-(pyridin-4-yl)ethyl]-1,3,4-oxadiazole-2(3H)-thione}] nitrate acetonitrile sesquisolvate dichloromethane sesquisolvate], {[Cu(NO3)(C14H12N4OS)2]NO3·1.5CH3CN·1.5CH2Cl2}n, (II). Compound (I) presents a distorted rectangular centrosymmetric Zn2L2ring (dimensions 9.56 × 7.06 Å), where each ZnIIcentre lies in a {ZnN2O4} coordination environment. These binuclear zinc metallocycles are linked into a two-dimensional network through nonclassical C—H...O hydrogen bonds. The resulting sheets lie parallel to theacplane. Compound (II), which crystallizes as a nonmerohedral twin, is a coordination polymer with double chains of CuIIcentres linked by bridgingLligands, propagating parallel to the crystallographicaaxis. The CuIIcentres adopt a distorted square-pyramidal CuN4O coordination environment with apical O atoms. The chains in (II) are interlinkedviatwo kinds of π–π stacking interactions along [0\overline 11]. In addition, the structure of (II) contains channels parallel to the crystallographicadirection. The guest components in these channels consist of dichloromethane and acetonitrile solvent molecules and uncoordinated nitrate anions.

Slow relaxation of two dimensional salen type lanthanide coordination polymer

2020 ◽  
Vol 507 ◽  
pp. 119455 ◽  
Author(s):  
Xiaoyan Zou ◽  
Chenyu Du ◽  
Yanping Dong ◽  
Guangming Li
Keyword(s):  
Coordination Polymer ◽  
Slow Relaxation ◽  
Two Dimensional ◽  
Lanthanide Coordination Polymer

A zinc(II) coordination polymer containing single- and double-stranded helical chains: synthesis, crystal structure, and thermal and luminescence properties

2018 ◽  
Vol 73 (9) ◽  
pp. 655-660
Author(s):  
Fei-Hang Zhang ◽  
Nan-Nan Chai ◽  
Sheng-Chun Chen ◽  
Ming-Yang He ◽  
Qun Chen
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Single Crystal ◽  
Network Architecture ◽  
Luminescence Properties ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dimensional Network

AbstractA new zinc(II)-based coordination polymer {[Zn(5-fip)(tdbpy)]·(DMF)}n (1) {5-H2fip=5-fluoroisophthalic acid, tdbpy=4,4′-(2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diyl)bispyridine, DMF=dimethylformamide} has been solvothermally synthesized and structurally characterized. Single-crystal X-ray diffraction revealed that complex 1 shows a unique two-dimensional network architecture containing single-stranded [Zn(5-fip)]n and double-stranded helical [Zn(tdbpy)]n chains. The thermal and luminescence properties of complex 1 have also been studied.

A new two-dimensional CdIIcoordination polymer based on 2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole and benzene-1,2-dicarboxylate: synthesis, crystal structure and characterization

2017 ◽  
Vol 73 (10) ◽  
pp. 828-832 ◽  
Author(s):  
Huai-Xia Yang ◽  
Yan-Qiu Yang ◽  
Di Cheng ◽  
Ya-Xue Li ◽  
Xiang-Ru Meng
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Spectroscopic Properties ◽  
Organic Ligands ◽  
Two Dimensional ◽  
Coordination Environment ◽  
Dimensional Network ◽  
Ir Spectroscopic

In the construction of coordination polymers, many factors can influence the formation of the final architectures, such as the nature of the metal centres, the organic ligands and the counter-anions. In the coordination polymer poly[aqua(μ-benzene-1,2-dicarboxylato-κ4O1,O1′:O2,O2′)[μ-2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole-κ2N2:N3]cadmium(II)], [Cd(C12H12N4)(C8H4O4)(H2O)]nor [Cd(immb)(1,2-bdic)(H2O)]n, each CdIIion is seven-coordinated by two N atoms from two symmetry-related 2-(1H-imidazol-1-ylmethyl)-6-methyl-1H-benzimidazole (immb) ligands, by four O atoms from two symmetry-related benzene-1,2-dicarboxylate (1,2-bdic2−) ligands and by one water molecule, leading to a CdN2O5distorted pentagonal bipyramidal coordination environment. The immb and 1,2-bdic2−ligands bridge CdIIions and form a two-dimensional network structure. O—H...O and N—H...O hydrogen bonds stabilize the structure. In addition, the IR spectroscopic properties, PXRD patterns, thermogravimetric behaviour and fluorescence properties of the title polymer have been investigated.

Crystal structure and photoluminescence of a new two-dimensional Cd(II) coordination polymer based on 3-(carboxymethoxy)-2-naphthoic acid

2015 ◽  
Vol 70 (8) ◽  
pp. 605-608
Author(s):  
Zhi-Guo Kong ◽  
Sheng-Nan Guo ◽  
Jia-Qi Miao ◽  
Miao An
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Coordination Polymer ◽  
Room Temperature ◽  
Monoclinic Space Group ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dimensional Network ◽  
Naphthoic Acid

AbstractA new Cd(II) coordination polymer, [Cd(CNA)]n (1) (H2CNA = 3-(carboxymethoxy)-2-naphthoic acid), was hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction. The crystals are monoclinic, space group P21/c with a = 16.9698(18), b = 7.8314(8), c = 8.9553(10) Å, β = 100.657(2)°, V = 1169.6(2) Å3, Z = 4, Dcalcd. = 2.03 g cm−3, μ(MoKα) = 1.9 mm−1, F(000) = 696 e, R = 0.0305, wR = 0.0784 for 172 refined parameters and 2285 data. Each CNA anion bridges three Cd(II) cations to give rise to a two-dimensional network structure. Topologically, if each CNA anion is regarded as a linker, and each Cd(II) atom considered as a 4-conencted node, the structure is simplified as a 4-connected (4,4) network. The solid state photoluminescent properties of the compound were also studied at room temperature.

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