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Coordination polymer
About: Coordination polymer is a research topic. Over the lifetime, 11988 publications have been published within this topic receiving 212219 citations.
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TL;DR: A porous coordination polymer with controllable size and morphology from nanocube to microoctahedron was readily synthesized in an ethanol-water mixture at room temperature by adjusting the concentration of the surfactant and the polymer shows size- and morphology-dependent sorption properties.
114 citations
TL;DR: In this article, the synthetic strategies for the preparation of nano-and micro-sized coordination polymer particles (CPPs) were reported, which are used for structural studies based on single-crystal X-ray analysis.
Abstract: Although the vast majority of coordinationpolymermaterials,includingmetal–organicframeworks(MOFs),are focused on macroscaled crystalline products, for structuralstudies based on single-crystal X-ray analysis, we and others haverecently reported the synthetic strategies for the preparation ofnano- and microsized coordination polymer particles (CPPs).
114 citations
TL;DR: The new ligands C(6)H(4) (pz = pyrazolyl ring), 1 (ortho), 2 (meta), and 3 (para), that can potentially bond two or more metal centers were obtained in a single step from the reaction of the appropriate dibromoxylene, 2 equiv of tris-2, 2,2-(1-pyrazolyL)ethanol, and excess NaH.
Abstract: The new ligands C6H4[CH2OCH2C(pz)3]2 (pz = pyrazolyl ring), 1 (ortho), 2 (meta), and 3 (para), that can potentially bond two or more metal centers were obtained in a single step from the reaction of the appropriate dibromoxylene, 2 equiv of tris-2,2,2-(1-pyrazolyl)ethanol, and excess NaH. Although the arrangement of the tris(pyrazolyl)methane units in the solid-state structures of 1 and 3 are similar, the orientation of these groups with respect to the phenyl ring are different, with 1 showing a twisted structure and 3 a stepped structure. The reaction of [Cd2(THF)5][BF4]4 with the appropriate ligand yields each of the three coordination polymers of the formula {C6H4[CH2OCH2C(pz)3]2Cd}(BF4)2}n, 4 (ortho), 5 (meta), and 6 (para). In the solid-state structures of all three each tris(pyrazolyl)methane unit is tridentate, with each ligand bonded to two different cadmium(II) atoms, forming a coordination polymer containing 6-coordinate, pseudooctahedral cadmium(II) centers. Polymers 4 and 5 form wavelike chain...
113 citations
TL;DR: In this paper, a new extended metal-organic framework [Cu(H2btec)(bipy)]∞ (1) (H4btec= 1,2,4,5-benzenetetracarboxylic acid; bipy= 2,2′-bipyridine) has been hydrothermally synthesized.
Abstract: A new extended metal-organic framework [Cu(H2btec)(bipy)]∞ (1) (H4btec= 1,2,4,5-benzenetetracarboxylic acid; bipy= 2,2′-bipyridine) has been hydrothermally synthesized. Violet crystals are formed in a monoclinic system with a space group C2/c; a = 10.1810(18) A, b = 14.4360(18) A, c= 12.894(3) A, β= 112.94(3)°. In the title compound 1 each Cu(II) centre has a distorted square planar environment, completed by two N atoms from one bipy ligand and two O atoms belonging to two dihydrogen benzene-1,2,4,5-tetracarboxylate anions (H2btec2−). The {Cu(bipy)}2+ moieties are bridged by H2btec2− anions to form an infinite one-dimensional coordination polymer with a zig-zag chain structure along the c axis. A double-chain structure is formed by hydrogen bonds between adjacent zig-zag chains. There are also π–π stacking interactions between the bipy ligands, with an average distance of 3.62 A resulting in a two-dimensional network structure. Compound 1 was tested as a catalyst for the oxidation of cyclohexene and styrene, with tert-butyl hydroperoxide (TBHP) as oxidant. The catalytic activity (24 h and 75 °C) found for [Cu(H2btec)(bipy)]∞ shows a high value for the conversion of cyclohexene (64.5%), and a lower one for styrene (23.7%). High turnover frequency (TOF) values for the epoxide products were observed, indicating that the catalyst synthesized in this work, not only has a high activity and selectivity for epoxidation reactions but is also very efficient.
112 citations
TL;DR: The results show that the increase of coordination sites of the ligands is an effective route to obtaining higher-dimensional structures and anions could influence the configuration of theligand to tune the coordination network topology from those with helical chains to those without.
Abstract: The self-assembly of silver(I) salts with bitopic triazole ligands 4-(salicylideneamino)-1,2,4-triazole (L1) and 4-(2-pyridinyl)-1,2,4-triazole (L2) produced dinuclear complexes and a 1D molecular-ladder coordination polymer, while the reaction of tritopic ligand 4-(3-pyridinyl)-1,2,4-triazole (L3) with AgClO4 afforded a right-handed helical 2D network with (4,4) topology, a meso layer constructed via left- and right-handed helical chains with AgBF4, and a 2D 4.82 net containing no helical chain with AgNO3. Using a tetratopic triazole ligand 2,6-bis(4-triazolyl)pyridine (L4), a 3D coordination polymer was isolated. This complex contains a cationic 4.63 network with rhombic channels, accepting two columns of uncoordinated ClO4- anions filling into every central cavity. Our results show that (i) the increase of coordination sites of the ligands is an effective route to obtaining higher-dimensional structures and (ii) anions could influence the configuration of the ligand to tune the coordination network top...
112 citations