American Chemical Society
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New Doubly Interpenetrated MOF with [Zn4O] Clusters and Its Doped Isomorphic MOF: Sensing, Dye, and Gas Adsorption Capacity

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journal contribution
posted on 2019-10-24, 12:43 authored by Dan Wu, Jiao Liu, Jing Jin, Jianguo Cheng, Meng Wang, Guoping Yang, Yao-Yu Wang
A doubly interpenetrated metal–organic framework (MOF) [Zn4(L)3O]·8DMF·H2O (1, DMF = N,N-dimethylformamide) including the [Zn4O] clusters was first synthesized by employing a rigid 2,6-bis­(4′-carboxyl-phenyl)­pyridine (H2L) ligand. Then, the isomorphic complex 2 was prepared by partially replacing Zn­(II) ions with Co­(II) ions in the structure of 1. The luminescent investigations showed complex 1 is a great MOF-based probe for sensing the environmentally relevant Fe3+ and Cu2+ ions and nitrobenzene. Meanwhile, complex 1 displayed the unique selective sorption to methylene blue dyes. Notably, the CO2 sorption demonstrated that complexes 1 and 2 showed the special gate-opening effect at low temperatures. Especially, the gate-opening pressure of the isostructural product can be adjusted by doping Co­(II) ions into the [Zn4O] clusters. Thereby, complex 1 should be a useful material for sensing, dye, and gas adsorption.