Coordination environments and π-conjugation in dense lithium coordination polymers

CrystEngComm ◽  
2016 ◽  
Vol 18 (3) ◽  
pp. 398-406 ◽  
Author(s):  
Satoshi Tominaka ◽  
Hamish H.-M. Yeung ◽  
Sebastian Henke ◽  
Anthony K. Cheetham
Keyword(s):  
Coordination Polymers ◽  
Organic Ligand ◽  
Weak Relationship

A weak relationship between the longest C–O bond in an anionic organic ligand and the shortest Li–O bond was found.

Tuning structural topologies of four Ni(ii) coordination polymers through modifying the substitute group of organic ligand

CrystEngComm ◽  
2013 ◽  
Vol 15 (31) ◽  
pp. 6191 ◽  
Author(s):  
Feng Guo ◽  
Baoyong Zhu ◽  
Mingli Liu ◽  
Xiuling Zhang ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Organic Ligand

Synthesis and Luminescent Properties of a Novel Nanoscale Eu(III)-Carboxylate Coordination Polymer

2013 ◽  
Vol 328 ◽  
pp. 715-718
Author(s):  
Cheng An Tao ◽  
Yan An Lv ◽  
Ling Qiang Meng ◽  
Hui Ping Liu ◽  
Zhi Hong Hu ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Coordination Polymers ◽  
Organic Ligand ◽  
Luminescent Properties ◽  
The Self ◽  
Side Group ◽  
Ordered Structures ◽  
Intense Luminescence ◽  
Metal Ligand ◽  
The Eu

To prepare nanoscale coordination polymers (NCPs) which can exhibit intense luminescence have attract an increasing interest. In this paper, we present the synthesis of a novel example of discus-like luminescent nanoscale Eu (III)-carboxylate coordination polymers. The organic ligand is a derivative of terephthalate (Na2L) with a big side group. The Eu (III)-L NCPs was synthesized through microemulsion method, and the morphology can alter along with the changing of metal: ligand ratios. XRD results reveal that the self-assembled disk-like NCPs exhibit long-range ordered structures. The luminescent measurements showed that the resultant NCPs not only exhibits typical fluorescence of Eu (III), but also can maintain the inherent fluorescence of the ligands.

From an organic ligand to a metal–organic coordination polymer, and to a metal–organic coordination polymer–cocrystal composite: a continuous promotion of the proton conductivity of crystalline materials

CrystEngComm ◽  
2020 ◽  
Vol 22 (8) ◽  
pp. 1414-1424
Author(s):  
Xiaoqiang Liang ◽  
Tingting Cao ◽  
Li Wang ◽  
Changzheng Zheng ◽  
Yamei Zhao ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Proton Conductivity ◽  
Coordination Polymers ◽  
Organic Ligand ◽  
Organic Ligands ◽  
Crystalline Materials ◽  
Composite Formation ◽  
New Strategy ◽  
Metal Organic

A new strategy was proposed to increase proton conductivities in metal–organic coordination polymers (MOCPs) commencing from organic ligands, i.e. coordination inducement and MOCP–cocrystal composite formation.

Syntheses and structures of two new coordination polymers generated from a 4-aminotriazole-bridged organic ligand and CoII salts

2017 ◽  
Vol 73 (3) ◽  
pp. 247-253 ◽  
Author(s):  
Xue-Ru Wang ◽  
Jian-Ping Ma ◽  
Yu-Bin Dong
Keyword(s):  
Coordination Polymers ◽  
Weak Interactions ◽  
Organic Ligand ◽  
Organic Ligands ◽  
Two Dimensional ◽  
Structural Variations ◽  
X Ray ◽  
Π Interactions ◽  
Coordination Spheres ◽  
Solvothermal Conditions

Organic ligands and counter-anions influence the coordination spheres of metal cations and hence the construction of coordination polymers (CPs). The specific bent geometries of five-membered heterocyclic triazole bridging organic ligands are capable of generating CPs with novel patterns not easily obtained using rigid linear ligands. A multidentate 4-aminotriazole-bridged organic ligand, namely 4-amino-3,5-bis(4,3′-bipyridyl-5′-yl)-4H-1,2,4-triazole (L) has been prepared and used to synthesize two CoII coordination polymers, namely poly[[[μ2-4-amino-3,5-bis(4,3′-bipyridyl-5′-yl)-4H-1,2,4-triazole-κ2 N:N′]bis(methanol-κO)cobalt(II)] bis(perchlorate)], {[Co(C22H16N8)2(CH3OH)2](ClO4)2} n , (I), and poly[[μ3-4-amino-3,5-bis(4,3′-bipyridyl-5′-yl)-4H-1,2,4-triazole-κ3 N:N′:N′′]dichloridocobalt(II)], [CoCl2(C22H16N8)] n , (II), using CoX 2 salts [X = ClO4 for (I) and Cl for (II)] under solvothermal conditions. Single-crystal X-ray structure analysis revealed that they both feature two-dimensional networks. Cobalt is located on an inversion centre in (I) and in a general position in (II). In (I), L functions as a bidentate cis-conformation ligand linking CoII ions, while it functions as a tridentate trans-conformation linker binding CoII ions in (II). In addition, O—H...N and N—H...O hydrogen bonds and C—H...π interactions exist in (I), while N—H...Cl and π–π interactions exist in (II), and these weak interactions play an important role in aligning the two-dimensional nets of (I) and (II) in the solid state. As the compounds were synthesized under the same conditions, the significant structural variations between (I) and (II) are believed to be determined by the different sizes and coordination abilities of the counter-anions. IR spectroscopy and diffuse reflectance UV–Vis spectra were also used to investigate the title compounds.

Three one-dimensional coordination polymers based on 1,1′-bis(pyridin-4-ylmethyl)-2,2′-bi-1H-benzimidazole and HgX2(X= Cl, Br and I)

2013 ◽  
Vol 70 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Ai-Guo Li ◽  
Qi-Kui Liu ◽  
Yan-An Li ◽  
Zhi-Xian Liu ◽  
Yu-Bin Dong
Keyword(s):  
Coordination Polymers ◽  
Free Ligand ◽  
Organic Ligand ◽  
Coordination Complexes ◽  
Coordination Geometry ◽  
Asymmetric Unit ◽  
Compound I ◽  
One Dimensional ◽  
Bridging Ligand ◽  
Dimensional Network

A new 2,2′-bi-1H-benzimidazole bridging organic ligand, namely 1,1′-bis(pyridin-4-ylmethyl)-2,2′-bi-1H-benzimidazole, C26H20N6,Lor (I), has been synthesized and used to create three new one-dimensional coordination polymers,viz.catena-poly[[dichloridomercury(II)]-μ-1,1′-bis(pyridin-4-ylmethyl)-2,2′-bi-1H-benzimidazole], [HgCl2(C26H20N6)]n, (II), and the bromido, [HgBr2(C26H20N6)]n, (III), and iodido, [HgI2(C26H20N6)]n, (IV), analogues. Free ligandLcrystallizes with two symmetry-independent half-molecules in the asymmetric unit and eachLmolecule resides on a crytallographic inversion centre. In structures (II)–(IV), theLligand is also positioned on a crystallographic inversion centre, whereas the Hg centre resides on a crystallographic twofold axis. Compound (I) adopts ananticonformation in the solid state and forms a two-dimensional network in the crystallographicbcplaneviaπ–π and C—H...π interactions. The three HgIIcoordination complexes, (II)–(IV), have one-dimensional zigzag chains composed ofLand HgX2(X= Cl, Br and I), and the HgIIcentres are in a distorted tetrahedral [HgX2N2] coordination geometry. Complexes (III) and (IV) are isomorphous, whereas complex (II) displays an interesting conformational difference from the others,i.e.a twist in the flexible bridging ligand.

Tuning structural topologies of five photoluminescent Cd(II) coordination polymers through modifying the substitute group of organic ligand

2013 ◽  
Vol 199 ◽  
pp. 42-48 ◽  
Author(s):  
Feng Guo ◽  
Baoyong Zhu ◽  
Guilan Xu ◽  
Miaomiao Zhang ◽  
Xiuling Zhang ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Organic Ligand

scholarly journals Crystallographic Study of a coordination polymer based on Zn2+ion

2014 ◽  
Vol 70 (a1) ◽  
pp. C647-C647
Author(s):  
Heitor De Abreu ◽  
Renata Diniz ◽  
Filipe De Almeida
Keyword(s):  
Coordination Polymer ◽  
Coordination Polymers ◽  
Metal Ion ◽  
Structure Refinement ◽  
Organic Ligand ◽  
Future Application ◽  
Distorted Octahedral Geometry ◽  
Statistical Parameters ◽  
Cell Parameters ◽  
Coordinated Water

Several studies have aimed to better understand coordination polymers, which are structures based on a connection between a metal ion and an organic ligand that extends infinitely, forming a macro-structure1. The interest in this type of structure is mainly due to its properties, such as its pore-forming ability, presenting many potential applications2 like selective separations, catalysis and gas storage. It is interesting to study the structure of coordination polymers to focus in some particular future application. In these way, a coordination polymer was synthetized by simple mixture with isonicotinylhydrazine (INH) and 1,2,4,5-benzenetetracarboxylic acid (BTC) ligands and zinc metallic ion. Yellow single crystals were formed in solution and one was separated, measured and solved by single crystal X-ray diffraction. The crystal-data for the structure were collected using an Oxford GEMINI A-Ultra diffractometer with MoKα radiation (λ = 0.71073 Å) at room temperature and solved using SHELXL-97 program3. The compound crystallized in monoclinic crystalline system in space group P21/c, cell parameters: a=9.2502(6) Å, b= 15.0004(6) Å, c=9.2947(4) Å, β= 108.4590(6), V=1223,35 Å3and Z=4. The final statistical parameters of the structure refinement were R=0.0326, wR=0.0835 and S=1,053. In this compound the BTC and INH ligands are coordinated like a bridge to two zinc ions. The BTC forms chelates by two carboxylate groups and INH coordinates by pyridine ring and by chelate at hydrazide group. This polymer extends in only one direction along a axis forming a 1D network. There is only one metallic zinc ion crystallographically independent on structure, it is in a distorted octahedral geometry with oxygen and nitrogen atoms of ligands and one coordinated water molecule in its coordination sphere. The 1D network formed by coordination polymers stabilizes the crystalline arrangement by hydrogen bonds between carboxylate and hydrazide groups and coordinated water molecules.

Anion...π interactions in copper(I) chloride and bromide coordination polymers bearing 1,4-bis(pyridazin-4-yl)benzene ligands

2014 ◽  
Vol 70 (2) ◽  
pp. 173-177
Author(s):  
Anna S. Degtyarenko ◽  
Konstantin V. Domasevitch
Keyword(s):  
Coordination Polymers ◽  
Organic Ligand ◽  
Organic Ligands ◽  
Π Interactions ◽  
Π Stacking ◽  
Interlayer Anion ◽  
Close Parallel

In poly[[μ4-1,4-bis(pyridazin-4-yl)benzene-1:2:3:4κ4N1:N2:N1′:N2′]di-μ2-chlorido-dicopper(I)], [Cu2Cl2(C14H10N4)]n, (I), and its isomorphous bromide analogue, [Cu2Br2(C14H10N4)]n, (II), the organic ligand is situated across a centre of inversion. The CuIcations adopt a distorted tetrahedral [CuN2X2] [X= Cl in (I) or Br in (II)] environment [Cu—N = 2.0183 (14)–2.0936 (14) Å; Cu—Cl = 2.2686 (6) and 2.4241 (5) Å; Cu—Br = 2.4002 (6) and 2.5284 (5) Å] and the primary coordination motif consists of cuprohalogenide chains accommodating μ-pyridazine groups. The organic ligands are tetradentate and link the inorganic chains into corrugated layers. Their packing is influenced by interlayer anion...π interactions [Cl...π = 3.540 (2) Å and Br...π = 3.593 (2) Å] with the electron-deficient pyridazine rings. This kind of interaction precludes the characteristic slipped π–π stacking and close parallel alignment of the organic tectons; it may be involved as a structure-defining factor for coordination layers based upon lengthy polyaromatic linkers.

Three AgI, CuI and CdII coordination polymers based on the new asymmetrical ligand 2-{4-[(1H-imidazol-1-yl)methyl]phenyl}-5-(pyridin-4-yl)-1,3,4-oxadiazole: syntheses, characterization and emission properties

2019 ◽  
Vol 75 (12) ◽  
pp. 1690-1697
Author(s):  
Guo-Xia Jin ◽  
Tian-Chao You ◽  
Jian-Ping Ma
Keyword(s):  
Metal Ions ◽  
Coordination Polymers ◽  
Organic Ligand ◽  
One Dimensional ◽  
Coordination Sites ◽  
Metal Atoms ◽  
Polymeric Chains ◽  
Benzene Rings ◽  
Polymeric Structures ◽  
Methyl Phenyl

The new asymmetrical organic ligand 2-{4-[(1H-imidazol-1-yl)methyl]phenyl}-5-(pyridin-4-yl)-1,3,4-oxadiazole (L, C17H13N5O), containing pyridine and imidazole terminal groups, as well as potential oxdiazole coordination sites, was designed and synthesized. The coordination chemistry of L with soft AgI, CuI and CdII metal ions was investigated and three new coordination polymers (CPs), namely, catena-poly[[silver(I)-μ-2-{4-[(1H-imidazol-1-yl)methyl]phenyl}-5-(pyridin-4-yl)-1,3,4-oxadiazole] hexafluoridophosphate], {[Ag(L)]PF6} n , catena-poly[[copper(I)-di-μ-iodido-copper(I)-bis(μ-2-{4-[(1H-imidazol-1-yl)methyl]phenyl}-5-(pyridin-4-yl)-1,3,4-oxadiazole)] 1,4-dioxane monosolvate], {[Cu2I2(L)2]·C4H8O2} n , and catena-poly[[[dinitratocopper(II)]-bis(μ-2-{4-[(1H-imidazol-1-yl)methyl]phenyl}-5-(pyridin-4-yl)-1,3,4-oxadiazole)]–methanol–water (1/1/0.65)], {[Cd(L)2(NO3)2]·2CH4O·0.65H2O} n , were obtained. The experimental results show that ligand L coordinates easily with linear AgI, tetrahedral CuI and octahedral CdII metal atoms to form one-dimensional polymeric structures. The intermediate oxadiazole ring does not participate in the coordination interactions with the metal ions. In all three CPs, weak π–π interactions between the nearly coplanar pyridine, oxadiazole and benzene rings play an important role in the packing of the polymeric chains.

Metal–organic frameworks based on the [1,1′:3′,1′′-terphenyl]-3,3′′,5,5′′-tetracarboxylic acid ligand: syntheses, structures and magnetic properties

2014 ◽  
Vol 43 (41) ◽  
pp. 15475-15481 ◽  
Author(s):  
Xiaofeng Lv ◽  
Lu Liu ◽  
Chao Huang ◽  
Li'an Guo ◽  
Jie Wu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Transition Metals ◽  
Coordination Polymers ◽  
Metal Organic Frameworks ◽  
Organic Ligand ◽  
Tetracarboxylic Acid ◽  
Acid Ligand ◽  
Metal Organic

Five coordination polymers containing transition metals (Mn, Co, Ni) and the organic ligand [1,1′:3′,1′′-terphenyl]-3,3′′,5,5′′-tetracarboxylic acid (H4TPTA) were synthesized and characterized. Moreover, the magnetism of complexes 3–5 is also discussed.

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