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The integration of negatively charged single-metal building blocks In (CO2) 4 and positively charged trimeric clusters In3O leads to three unique cage-within-cage-based porous materials, which exhibit not only high hydrothermal, thermal, and photochemical stability but also attractive structural features contributing to a very high CO2 uptake capacity of up to 119. 8 L/L at 273 K and 1 atm.
Zheng et al. (Tue,) studied this question.