TY - JOUR
T1 - One‐dimensional metal–organic frameworks built by coordinating 2,4,6‐tris(4‐pyridyl)‐1,3,5‐triazine linker with copper nodes: CO 2 adsorption properties
AU - Portolés‐Gil, Núria
AU - Vallcorba, Oriol
AU - Fraile‐Sainz, Julio
AU - López‐Periago, Ana M.
AU - Domingo, Concepción
AU - Ayllón, José A.
N1 - Publisher Copyright:
© 2022 The Authors. Applied Organometallic Chemistry published by John Wiley & Sons Ltd.
PY - 2022/10/25
Y1 - 2022/10/25
N2 - 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 CO
2. 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, N
2 adsorption/desorption measurements at 77 K confirm the microporous character of (2) with an apparent surface area of 190 m
2 g
−1. Besides, at 273 K this material clearly shows a significant adsorption of CO
2 prompted by noncoordinated nitrogen in the triazine linker.
AB - 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 CO
2. 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, N
2 adsorption/desorption measurements at 77 K confirm the microporous character of (2) with an apparent surface area of 190 m
2 g
−1. Besides, at 273 K this material clearly shows a significant adsorption of CO
2 prompted by noncoordinated nitrogen in the triazine linker.
KW - CO adsorption
KW - metal–organic framework
KW - solid-phase transformation
KW - triazine
KW - tritopic linker
UR - https://www.scopus.com/pages/publications/85140361249
UR - https://www.mendeley.com/catalogue/72877c55-2aa7-302c-9a9d-72d9b7c5aed1/
U2 - 10.1002/aoc.6930
DO - 10.1002/aoc.6930
M3 - Article
SN - 0268-2605
VL - 37
JO - Applied Organometallic Chemistry
JF - Applied Organometallic Chemistry
IS - 1
M1 - e6930
ER -