One-dimensional metal-organic frameworks built by coordinating 2,4,6-tris(4-pyridyl)-1,3,5-triazine linker with copper nodes : CO2 adsorption properties
Portoles-Gil, Nuria (Institut de Ciència de Materials de Barcelona)
Vallcorba Valls, Oriol (ALBA Laboratori de Llum de Sincrotró)
Fraile, Julio (Institut de Ciència de Materials de Barcelona)
Lopez-Periago, Ana M. (Institut de Ciència de Materials de Barcelona)
Domingo, Concepción (Institut de Ciència de Materials de Barcelona)
Ayllon, Jose Antonio (Universitat Autònoma de Barcelona. Departament de Química)

Date:	2023
Abstract:	The reaction between 2,4,6-tris(4-pyridyl)-1,3,5-triazine (4-tpt) and copper(II) hexafluoroacetylacetone (Cu(hfa)2) yields two different 1D metal-organic frameworks (MOFs), [(Cu(hfa)2)2(4-tpt)]n (1) and [Cu(hfa)2(4-tpt)]n (2). The Cu:4-tpt ratio in the new MOFs is determined by the reaction medium, particularly, the solvent used. The two compounds have been fully characterized, including crystal structure elucidation. [(Cu(hfa)2)2(4-tpt)]n (1), with a 2:1 Cu:4-tpt ratio, could be precipitated in either 1,1,2-trichloroethane or supercritical CO2. In (1), 4-tpt shows a tritopic coordination mode, but only half of the Cu(hfa)2 subunits act as a node, thus connecting two 4-tpt and giving a 1D network. The other half of Cu(hfa)2 subunits are connected only to one pyridine and thus protrude along the chains. The later Cu(hfa)2 fragments show a labile character and can be dissolved in diethyl ether to give the second MOF [Cu(hfa)2(4-tpt)]n (2), with a 1:1 Cu:4-tpt ratio. The compound (2) has also a 1D structure, with all the incorporated copper atoms acting as nodes. In this case, the packing of the chains defines accessible channels, which are perpendicular to the chain axis. After activation, N2 adsorption/desorption measurements at 77 K confirm the microporous character of (2) with an apparent surface area of 190 m2 g−1. Besides, at 273 K this material clearly shows a significant adsorption of CO2 prompted by noncoordinated nitrogen in the triazine linker.
Grants:	Ministerio de Ciencia e Innovación CEX2019-000917-S Agencia Estatal de Investigación PID2020-115631GB-I00
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Applied Organometallic Chemistry, Vol. 37, Issue 1 (January 2023) , art. e6930, ISSN 1099-0739

DOI: 10.1002/aoc.6930

10 p, 1.7 MB

Supporting information 8 p, 916.0 KB

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