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SM ISO690:2012 DRUŢĂ, Vadim, VODĂ, Irina, BOUROSH, Pavlina, KRAVTSOV, Victor, LOZAN, Vasile. Synthesis and study of a new Co(II) MOF using rigide ligands. In: Physical Methods in Coordination and Supramolecular Chemistry, 8-9 octombrie 2015, Chişinău. Chisinau, Republic of Moldova: 2015, XVIII, p. 157. |
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Physical Methods in Coordination and Supramolecular Chemistry XVIII, 2015 |
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Conferința ""Physical Methods in Coordination and Supramolecular Chemistry"" Chişinău, Moldova, 8-9 octombrie 2015 | ||||||
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Pag. 157-157 | ||||||
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The aim of this work was the synthesis, determination of the composition, structure, and sorption properties of Co(II) MOFs using rigide ligands. There we report a method of solvothermal synthesis of Co(II) complex using 1,3,5-tris(4-carboxyphenyl)benzene acid (CFB) and bis-imidazolyl-bis-phenylene (BIBPh) as starting ligands. The synthesized product represents a tridimensional polymeric compound of formula {Co3O(OH)(1,3,5-CFB)2(DMF)2(H2O)3}∞. The composition and structure of complex was demonstrated by various methods of analyses (EA, IR, thermogravimetry, single crystal X-ray). Thermogravimetric study has demonstrated, that heating of polymeric sample up to 250 °C leads solely to elimination of solvent molecules from micropores. The degassed compound is stable up to 360 °C, then a process of irreversible destruction of molecular carcass is occuring. Single crystal X-ray structure investigation of coordination compound {Co O(OH)(1,3,5-CFB) } has demonstrated, that in the crystalline phase an unusual polymeric structure was obtained, where trinuclear groups {µ-O-Co3(II)OH} are interconnected by bridging molecules of hexadentate ligand 1,3,5-CFB. In polymer are present two types of large cavities where solvent molecules of H O and DMF are adsorbed. figureFig. 1. Crystal structure (left) and molecular packing (right) of the polymeric compound {Co3O(OH)(1,3,5-CFB)2(DMF)2(H2O)3}∞. Sorption properties have been tested through N2 adsorption at 273 0K and shown a maximum sorptio value ~110 cm3/g. The surface area (SBET = ~330 m2/g) is relatively moderate comparing with known highest values. |
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