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Analysis of a Cu-Doped Metal-Organic Framework, MFM-520(Zn1-x Cux ), for NO2 Adsorption.

ABSTRACT: MFM-520(Zn) confines dimers of NO2 with a high adsorption of 4.52 mmol g-1 at 1 bar at 298 K. The synthesis and the incommensurate structure of Cu-doped MFM-520(Zn) are reported. The introduction of paramagnetic Cu2+ sites allows investigation of the electronic and geometric structure of metal site by in situ electron paramagnetic resonance (EPR) spectroscopy upon adsorption of NO2 . By combining continuous wave and electron-nuclear double resonance spectroscopy, an unusual reverse Berry distorted coordination geometry of the Cu2+ centers is observed. Interestingly, Cu-doped MFM-520(Zn0.95 Cu0.05 ) shows enhanced adsorption of NO2 of 5.02 mmol g-1 at 1 bar at 298 K. Whereas MFM-520(Zn) confines adsorbed NO2 as N2 O4 , the presence of monomeric NO2 at low temperature suggests that doping with Cu2+ centers into the framework plays an important role in tuning the dimerization of NO2 molecules in the pore via the formation of specific host-guest interactions.

SUBMITTER: Wang Z 

PROVIDER: S-EPMC10767414 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature

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Analysis of a Cu-Doped Metal-Organic Framework, MFM-520(Zn<sub>1-x</sub> Cu<sub>x</sub> ), for NO<sub>2</sub> Adsorption.

Wang Zi Z   Sheveleva Alena M AM   Li Jiangnan J   Zhou Zhengyang Z   Sapchenko Sergei S   Whitehead George G   Warren Mark R MR   Collison David D   Sun Junliang J   Schröder Martin M   McInnes Eric J L EJL   Yang Sihai S   Tuna Floriana F  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20231114 1

MFM-520(Zn) confines dimers of NO<sub>2</sub> with a high adsorption of 4.52 mmol g<sup>-1</sup> at 1 bar at 298 K. The synthesis and the incommensurate structure of Cu-doped MFM-520(Zn) are reported. The introduction of paramagnetic Cu<sup>2+</sup> sites allows investigation of the electronic and geometric structure of metal site by in situ electron paramagnetic resonance (EPR) spectroscopy upon adsorption of NO<sub>2</sub> . By combining continuous wave and electron-nuclear double resonance sp  ...[more]

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