The reaction of tricarboxytriphenyl amine (H3TCA) with CdII and auxiliary ligand 4,4′-bis(1-imidazolyl)biphenyl (bimb) afforded [Cd3(TCA)2(bimb)·(DMA)6]n (1) containing a two-fold interpenetrating three-dimensional microporous framework. Compound 1 showed remarkable adsorption enthalpies for CO2 and H2 and good H2/N2 selectivity at low temperature. Moreover, activated 1 showed a highly selective adsorption towards CO2 over N2 and CH4 under ambient conditions. Interestingly, compound 1 selectively removed methyl orange (MO) over methylene blue (MB) from contaminated water with good recyclability, and possessed the second highest adsorption capacity for MO among the MOFs reported to date. Remarkably, complex 1 showed strong guest-dependent luminescence behavior.
