posted on 2023-11-24, 00:52authored byJing Wu, Yunli Wang, Jin-Peng Xue, Dapeng Wu, Jia Li
A novel
Cl-decorated trinuclear-Cu cluster-based MOF (NbU-7-Cl, NbU denotes Ningbo University) was synthesized by a stepwise synthesis
strategy. Compared to one-step reactions, the strategy of combining
cationic templates with single-crystal-to-single-crystal transformation
provides more possibilities for the design and postsynthetic modification
of multifunctional materials. Note that the chloride ions are attached
to the copper ions of the planar trinuclear cluster nodes in a fully
symmetric or partially asymmetric manner. The insertion of the chloride
ion can alter the overall symmetry and adsorption energy in addition
to occupying the appropriate asymmetric orbit and reducing the effective
active sites of metal. The activated NbU-7-Cl displays
improved C2H2 uptake capacity and C2H2/C2H4 and C2H2/CO2 separation performance, which is proved by breakthrough
experiments.