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Título

Hollow Microcrystals of Copper Hexafluoroacetylacetonate-Pyridine Derivative Adducts via Supercritical CO2 Recrystallization

AutorLópez Periago, Ana M. ; Vallcorba, Oriol ; Domingo Pascual, M. Concepción; Ayllón, José A.
Palabras claveMetal-organic frameworks: Carbon-dioxide
Mechanisms
Growth
Fundamentals
Crystallization
Fluid
Bidentate ligands
Complexes
Crystal
Fecha de publicación2-mar-2016
EditorAmerican Chemical Society
CitaciónCrystal Growth and Design 16(3): 1725-1736 (2016)
ResumenAn innovative crystallization process, based in the use of the eco-friendly supercritical carbon dioxide (scCO2) solvent, is presented for the production of coordination compounds macrocrystals of general formula [Cu(hfacac)2(dPy)2], with intriguing prismatic hollow structures and single polymorphic forms. On the contrary, conventional solvents yielded compact microstructures. Studied pyridine derivatives (dPy) were 4-phenylpyridine, PhPy; 4-benzylylpyridine, BzPy; and 4-acetylpyridine, AcPy. In the specific case of the [Cu(hfacac)2(AcPy)2] adduct, the use of scCO2 as a solvent allows obtaining a pure polymorph, while the conventional solvent trials yielded a mixture of two polymorphs. Four new crystalline structures have been resolved from single crystal X-ray diffraction. All the structures consist in mononuclear complexes connected through intermolecular interactions, including H···H, H···O, F···F, C-F···Caromatic and/or C-F··· interactions, generating bidimensional networks that determine their crystallization mode in scCO2.
URIhttp://hdl.handle.net/10261/145883
DOI10.1021/acs.cgd.5b01809
Identificadoresdoi: http://dx.doi.org/10.1021/acs.cgd.5b01809
issn: 1528-7505
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