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Self-assembly of the custom-designed octatopic porphyrin ligand of tetrakis(3,5-dicarboxybiphenyl)porphine with the in situ generated Cu2(CO2)4 paddlewheel moieties afforded a porous metal-metalloporphyrin framework, MMPF-9, which features a high density of Cu(II) sites confined within nanoscopic channels and demonstrates excellent performances as a heterogeneous Lewis-acid catalyst for chemical fixation of CO2 to form carbonates at room temperature under 1 atm pressure.
Gao et al. (Wed,) studied this question.