Modulation of Uptake and Reactivity of Nitrogen Dioxide in Metal-Organic Framework Materials.
Angew Chem Int Ed Engl
; 62(28): e202302602, 2023 Jul 10.
Article
in En
| MEDLINE
| ID: mdl-37027005
ABSTRACT
We report the modulation of reactivity of nitrogen dioxide (NO2 ) in a charged metal-organic framework (MOF) material, MFM-305-CH3 in which unbound N-centres are methylated and the cationic charge counter-balanced by Cl- ions in the pores. Uptake of NO2 into MFM-305-CH3 leads to reaction between NO2 and Cl- to give nitrosyl chloride (NOCl) and NO3 - anions. A high dynamic uptake of 6.58â
mmol g-1 at 298â
K is observed for MFM-305-CH3 as measured using a flow of 500â
ppm NO2 in He. In contrast, the analogous neutral material, MFM-305, shows a much lower uptake of 2.38â
mmol g-1 . The binding domains and reactivity of adsorbed NO2 molecules within MFM-305-CH3 and MFM-305 have been probed using in situ synchrotron X-ray diffraction, inelastic neutron scattering and by electron paramagnetic resonance, high-field solid-state nuclear magnetic resonance and UV/Vis spectroscopies. The design of charged porous sorbents provides a new platform to control the reactivity of corrosive air pollutants.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Angew Chem Int Ed Engl
Year:
2023
Type:
Article
Affiliation country:
United kingdom