A cobalt-based variant coordination polymer material with manifold like framework and 1D galleries or pores, Co2(pzdc)2(bpy), (pzdc: pyrazine-2,3-dicarboxylate and bpy: 4,4′-bipyridine), was prepared in an attempt to obtain enhance CO2adsorption interactions at ambient temperature. The material was fully characterized in terms of crystal structure, and its textural and adsorption properties. Extended thermal stability studies were also performed to elucidate thermal stability, this being crucial for determination of optimal activation conditions for both adsorption and regeneration tests. In contrast to the reported Cu2(pzdc)2(bpy), the cobalt variant exhibits CO2isotherms with some downwards concavity at ambient temperature and plausibly due to interaction of the adsorbate with greater surface electric fields generated by the metal node. Isosteric heats (DH) estimated via the Clausius-Clapeyron equation were larger by a factor of 1.5 and 2 for adsorption and desorption, respectively, compared to those reported for Cu2(pzdc)2(bpy). Further, the Co2(pzdc)2(bpy) CO2adsorption-desorption isotherm legs present a hysteretic behavior, plausibly associated to a concomitant structural contraction-expansion similar to the one reported for Cu2(pzdc)2(bpy).

Co2(pyrazine-2,3-dicarboxylate)2(4,4′-bipyridine) 1D porous coordination materials: Enhanced carbon dioxide adsorption at ambient temperature

2019 Fall National Meeting

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