Related Experiment Video
Updated: Jul 22, 2025
16:11
Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
2.3K
Reversible CO2 Fixation and Release by a Trinuclear Zn(II) Cryptate Complex and Operando Analysis of the Complex
Masakazu Murase1, Yoshifumi Maegawa1, Masataka Ohashi1
1Toyota Central R&D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi, 480-1192, Japan.
Chemsuschem
|July 20, 2023
Summary
A novel trinuclear zinc(II) cryptate complex (Zn3L) efficiently captures carbon dioxide (CO2) without added base. This CO2 fixation system is reversible and effective even for dilute CO2 concentrations.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Environmental Chemistry
Background:
- Carbonic anhydrase (CA) mimics are explored for CO2 fixation.
- Existing CA-inspired complexes often require base addition.
- Efficient CO2 capture under ambient conditions is crucial.
Purpose of the Study:
- To design and synthesize a trinuclear Zn(II) cryptate complex (Zn3L) for CO2 fixation.
- To evaluate the CO2 fixation performance and mechanism of Zn3L.
- To assess the potential of Zn3L as a CO2 capture material.
Main Methods:
- Synthesis of a trinuclear Zn(II) cryptate complex (Zn3L).
- CO2 fixation experiments under ambient temperature and pressure.
- Comparison with KOH(aq) as a standard CO2 absorbent.
- Operando extended X-ray absorption fine structure (EXAFS) spectroscopy for mechanism elucidation.
Main Results:
- Zn3L demonstrated rapid CO2 fixation, outperforming KOH(aq) at equivalent concentrations.
- The system operated without the need for additional base.
- CO2 release and complex regeneration were achieved through protonation/deprotonation of the ligand.
- Zn3L captured approximately 2.6 times more CO2 from dilute air than KOH(aq).
Conclusions:
- Zn3L exhibits efficient, base-free CO2 fixation with reversibility.
- The complex shows superior performance in capturing dilute CO2 from air.
- Zn3L is a promising candidate for CO2 capture applications.
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