Tuning the supramolecular isomerism of MOF-74 by controlling the synthesis conditions
Gheorghe, Andreea (Van't Hoff Institute for Molecular Sciences)
Imaz, Inhar (Institut Català de Nanociència i Nanotecnologia)
Van Der Vlugt, Jarl Ivar (Van't Hoff Institute for Molecular Sciences)
Maspoch Comamala, Daniel (Institut Català de Nanociència i Nanotecnologia)
Tanase, Stefania (Van't Hoff Institute for Molecular Sciences)

Data:	2019
Resum:	Supramolecular isomerism of metal-organic frameworks (MOFs) is known for several MOF structures, having direct implications on the properties of these materials. Although the synthesis of MOF isomers is mainly serendipitous in nature, achieving controlled formation of a target framework is highly relevant for practical applications. This work discusses the influence of additives and synthesis conditions on the formation of porous isomers containing Zn as nodes and 2,5-dihydroxy-1,4-benzenedicarboxylate (dobdc) as a linker. Using solvent mixtures containing strongly coordinated molecules, e. g. N,N'-dimethylformamide (DMF) and N-methylpyrrolidone (NMP), facilitates the formation of porous structures of type [Zn(dobdc)(S)]·yS (S = DMF, NMP) which are built from dinuclear Zn(O)(CO) secondary building units (SBUs) consisting of two different edge-sharing polyhedra with the Zn ions in a unsaturated coordinative environment. In the presence of water, the Zn dimers are converted to one-dimensional infinite Zn chains, in which the number of Zn-linker bonds increases, therefore giving a hydrolytically more stable coordination environment. The full characterization of the isomers as well as their conversion to the most stable isomer is presented.
Ajuts:	European Commission 615954 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad MAT2015-65354-C2-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-80
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Coordinated molecules ; Coordination environment ; Metalorganic frameworks ; N-methylpyrrolidone ; Presence of water ; Secondary building units ; Supramolecular isomerism ; Synthesis conditions
Publicat a:	Dalton transactions, Vol. 48, issue 27 (July 2019) , p. 10043-10050, ISSN 1477-9234

DOI: 10.1039/c9dt01572h
PMID: 31173007

Postprint 23 p, 1.3 MB

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