RESUMEN
We synthesized a novel Cu8 cluster and employed it as a building block to further obtain a copper cluster-based MOF material (CCMOF). Compared with the Cu8 cluster precursor, the periodically constructed CCMOF exhibited better structural stability, and showed enhanced photocatalytic H2 evolution performance due to efficient mass/charge transportation benefitting from the ordered porous framework structure. This two-step grafting construction strategy is of great significance to the exploration of copper clusters in catalytic applications.
RESUMEN
Developing promising luminescent probes for the selective sensing of nitro-explosives remains a challenging issue. Porous luminescent covalent-organic polymers are one of the excellent sensing probes for trace hazardous materials. Herein, fluorescent monomers 1,1,2,2-tetrakis(4-formyl-(1,1'-biphenyl))ethane (TFBE) and 1,3,5-benzenetricarboxylic acid trihydrazide (BTCH) were selected to build a novel hydrazone connected stable luminescent covalent-organic polymer (H-COP) of high stability by typical Schiff-base reaction. The N2 sorption study, BET surface area analysis, and TGA profile indicate the porosity and stability of this H-COP material. Such properties of the H-COP material enable a unique sensing platform for nitro-explosives with great sensitivity (Ksv â¼ 106 M) and selectivity up to µM. This polymer material shows attractive selectivity and sensitivity towards phenolic nitro-explosives and other common explosives among earlier reported COP-based sensors.