Magnetoelectricity-Mediated Tunable Absorption and Release of Peroxide Dianions

Wenqing Wei; Shuo Liu; Guoao Li; Kaihui Mao; Ka Wang; Xiaobing Xu; Shuhua Li; Xinglong Wu

doi:10.1021/acs.nanolett.2c04803

Magnetoelectricity-Mediated Tunable Absorption and Release of Peroxide Dianions

Nano Lett. 2023 May 10;23(9):3694-3700. doi: 10.1021/acs.nanolett.2c04803. Epub 2023 Apr 19.

Authors

Wenqing Wei¹, Shuo Liu¹, Guoao Li², Kaihui Mao¹, Ka Wang¹, Xiaobing Xu³, Shuhua Li², Xinglong Wu¹

Affiliations

¹ National Laboratory of Solid States Microstructures, School of Physics, Nanjing University, Nanjing 210093, P. R. China.
² Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
³ College of Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, P. R. China.

PMID: 37074399
DOI: 10.1021/acs.nanolett.2c04803

Abstract

Peroxide dianion (O₂^2-) has strong oxidizing activity and ease of proton abstraction and is extremely unstable. Direct and controllable adsorption and release of O₂^2- has large application implication and is a large challenge so far. Here, we use a unique metal (Ni)-organic (diphenylalanine, DPA) framework (MOF), Ni(DPA)₂, as adsorbents for absorption and release of O₂^2-. This MOF structure has room-temperature magnetoelectricity via distortion of the Ni-centered octahedron {NiN₂O₄} and thus possesses a tunable ferroelectric polarization under applied electric/magnetic fields. Controllable adsorption and release of O₂^2- are realized in such a MOF system via electrochemical redox measurements. Structural/spectroscopic characterization and calculations reveal that a number of NH active sites in the nanopores of MOF can effectively adsorb O₂^2- by hydrogen bonds and then tunable ferroelectric polarization induces controllable release of O₂^2- under applied magnetic fields. This work presents a constructive way for controllable adsorption and release of reactive oxygen species.

Keywords: magnetoelectricity; metal−organic framework; peroxide dianion; tunable adsorption and release.