Syntheses and characterizations of mesh-adjustable molecular sieves (MAMSs) for gas separation
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Solvothermal reactions between a series of amphiphilic ligands and M(NO3)2 (M=Cu, Co, Ni, Zn, Mn) afforded graphitic metal-organic frameworks (MAMS-1 to MAMS-6), containing hydrophilic channels within layers, and hydrophobic gas storage chambers between adjacent layers. When temperature is precisely controlled, the mesh sizes of those MAMSs can be accurately monitored. Gas adsorption studies have shown that commercially relevant gas separations, such as those of H2/N2, H2/CO, N2/O2, N2/CH4, CH4/C2H4, and C2H4/C3H6, are readily achievable by these MAMSs.