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A new porous metal–organic framework based on paddle-wheel Zn2 units and an unsymmetrical pyridyl dicarboxylate, contains a 3D intersecting pore system with uncommon stepwise adsorption and hysteretic desorption behavior for N2, CO2 and H2 gases at low temperature, and shows high selectivity for CO2 over N2 at ambient temperature.
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Liu et al. (2013) studied this question.
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