A new metal complex responsible for the capture of dilute CO2 in the atmosphere
A study conducted by Masakazu Murase et al. was published in ChemSusChem.
CO2 separation and capture technology for atmosphere and factory exhaust gas has been expected to be one way to suppress the progress of global warming. Various compounds, including amine compounds and zeolites, have been investigated as CO2 fixatives, and the selection of the most suitable one is contingent on the specific CO2 capture environment. To develop a more effective CO2 fixative, we designed a trinuclear Zn(II) complex (Zn3L), drawing inspiration from the functionality of carbonic anhydrase. An organic solution of Zn3L exhibited rapid CO2 fixation compared to an alkaline aqueous solution at the same molar concentration. Moreover, Zn3L demonstrated the potential for reversible reactions between CO2 fixation and release, and it exhibited high capture performance even for dilute atmospheric CO2. The structure of the complex during these reactions was analyzed using our Toyota beamline installed in the large synchrotron radiation facility Spring-8, and a reaction mechanism was proposed.
Title: Reversible CO2 Fixation and Release by a Trinuclear Zn(II) Cryptate Complex and Operando Analysis of the Complex Structure
Authors: Murase, M., Maegawa, Y., Ohashi, M., Goto, Y., Sakamoto, N., Nonaka, T., Uyama, T., Arai, T.
Journal Name: ChemSusChem
Published: July 20, 2023
https://doi.org/10.1002/cssc.202300679