An Unusual Luminescent Mo/S/Cu Cluster-Based Metal-Organic Framework for Efficient Detection of TNP

A new Mo/S/Cu cluster-based metal-organic framework, namely {[(MoS4Cu4)(CN)(2)(DPMF)(2)]center dot 2MeCN}(n) (1), had been firstly synthesized by using a functional angular ligand 4,4 '-((9H-fluoren-9-ylidene)methylene)dipyridine (DPMF). X-ray structural analysis reveals that 1 is constructed by saddle-shaped [MoS4Cu4](2+) clusters, DPMF and CN- bridges to exhibit an unusual 2D 8-connected network structure with a rare (3(12)center dot 4(14)center dot 5(2)) topology. Interestingly, a cavity with diameter of 5.6 angstrom is formed between two cross-arranged angular DPMF bridges. Luminescence measurements exhibit that 1 can detect 2,4,6-trinitrophenol (TNP) with high sensitivity, selectivity and good recyclability. These results demonstrate that 1 can serve as an excellent sensor for TNP through luminescent quenching effect.

Automated summary

A new metal-organic framework based on Mo/S/Cu clusters was synthesized and showed a rare 2D network structure with high sensitivity and selectivity for detecting TNP through luminescence quenching effect.