In light of the chemical exploitation of CO2, new reusable materials for efficiently catalyzing the cycloaddition of CO2 and epoxides under moderate conditions are needed. Herein, a new series of isostructural metal-organic frameworks (MOFs) M2(EDOB) [EDOB4- = 4,4 '-(ethyne-1,2-diyl)bis(2-oxido-benzoate), M = Mg, Ni, Co, Zn, Cu, Fe], known as M-MOF-184, analogous to a well-studied MOF-74 structure, were synthesized and fully characterized. The M-MOF-184 (M = Mg, Co, Ni, Zn) frameworks exhibit accessible mesopore channels (24 angstrom) and high porosity. Among them, Mg-MOF-184 demonstrated the most upper surface area (>4000 m(2) g(-1)) in any reported MOF-74-type frameworks. Furthermore, Co-MOF-184 revealed the highest CO2 uptake (73 cm(3) g(-1), at 298 K), and Zn-MOF-184 showed the highest catalytic activity upon the cycloaddition of CO2 (96% conversion, 86% selectivity, and 82% yield) under mild conditions (1 atm CO2, 80 degrees C, 6 h, and solvent-free). Notably, the catalytic performance of Zn-MOF-184 outperformed that of the original M-MOF-74 (M = Mg, Co, Zn) materials and various Zn-based MOFs. To evaluate the acidity and basicity of a series of M-MOF-184 (M = Mg, Co, Ni, Zn) frameworks, the interaction of these MOFs with acetonitrile vapor was investigated by vapor adsorption and ATR-FTIR spectroscopy measurements. As such, Zn-MOF-184 showed the strongest Lewis acidity derived by Zn cations, which was correlated to the highest catalytic activity upon the cycloaddition of CO2. Interestingly, the 2-oxidobenzoate anions from Co-MOF-184 showed the strongest basicity among the series, which was associated with the highest saturated acetonitrile uptake (544 cm(3) g(-1) at 298 K). Our findings suggest that the integration of Lewis acidic and basic sites, high surface area, and large accessible pores into the framework can facilitate the CO2 fixation reaction.