Coordination polymers of Cu(II), Co(II) and Cd(II) based on a tetramethyl-substituted terphenyldicarboxylic acid
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DASCĂLU, Ioan Andrei; SHOVA, Sergiu; DUMITRESCU, Dan Gheorghe; ROMAN, Gheorghe; BRATANOVICI, Bogdan Ionel; ARDELEANU, Rodinel; LOZAN, Vasile. Coordination polymers of Cu(II), Co(II) and Cd(II) based on a tetramethyl-substituted terphenyldicarboxylic acid. In: Polyhedron. 2019, nr. 170, pp. 463-470. ISSN 0277-5387.
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Polyhedron
Numărul 170 / 2019 / ISSN 0277-5387

Coordination polymers of Cu(II), Co(II) and Cd(II) based on a tetramethyl-substituted terphenyldicarboxylic acid


DOI: 10.1016/j.poly.2019.05.066
Pag. 463-470

Dascălu Ioan Andrei1, Shova Sergiu1, Dumitrescu Dan Gheorghe2, Roman Gheorghe1, Bratanovici Bogdan Ionel13, Ardeleanu Rodinel1, Lozan Vasile14
 
1 “Petru Poni” Institute of Macromolecular Chemistry,
2 Elettra Synchrotron Trieste,
3 „Alexandru Ioan Cuza” University, Iasi,
4 Institute of Chemistry
 
Disponibil în IBN: 9 iulie 2019


Rezumat

Three new 3D-metal–organic frameworks based on 2′,3′,5′,6′-tetramethyl-[1,1′:4′,1′′-terphenyl]-4,4′′-dicarboxylic acid (H2L) and Co, Cu, and Cd nodes have been synthesized. The complexes were characterized by elemental, thermogravimetric analysis, IR spectroscopy, single crystal, powder X-ray diffraction and gas sorption experiments. The crystal structure of [Cu2L2(H2O)2]n (1) corresponds to a two-dimensional coordination polymer, in which the metal nodes are two crystallographically equivalent Cu(II) atoms linked by four μ2-O,O′ carboxylate ligands in a centrosymmetric {Cu2O10} paddle-wheel building block. The structure of compound [CoL(dmso)]n (2) has a 3D metal–organic coordination lattice, in which the metal centers are connected by the linear organic ligand to generate a dense three-dimensional coordination polymer. Also, a three-dimensional coordination network was identified in the case of compound [Cd2L2(dmf)]n (3), whose structure is very similar to that of compound 2. In compound 3, the carboxylate groups of the linear L2− spacers behave as μ23O, O′:O tridentate bridging ligands. The compounds have a high thermal stability. Polymers 3 and 1 have moderate porosity (specific surface areas of approximately 900 m2/g and 600 m2/g, respectively), while polymer 2 has a dense structure.

Cuvinte-cheie
Coordination polymer, crystal structure, specific surface area, Terphenyl ligand, Topology