The development of fast and sensitive fluorescence sensors for nitro-explosive detection in aqueous environments remains a critical challenge for security and environmental monitoring. This work presents two novel metal-organic frameworks (MOFs) constructed from tetrakistetrazole-functionalized tetraphenylethylene (H4tazope), an aggregation-induced emission (AIE) -active ligand. Assembled with Cd (II) and Co (II) ions, the multidentate molecule based on the TPE core can afford neutral and anionic coordination polymers 1 and 2 with rare nona- and octa-coordinating bridging modes for each tetrakistetrazole ligand, in which the framework structures show the unprecedented 2D 3-nodal with the point symbol of 32. 46. 3. 42. 3. 52. 4. 62. 52. 42346. 32. 52 and 2-fold interpenetrated (4, 12) -connected topological networks, respectively. Detailed research on the use of the luminescent MOF with TPE chromophore attached with four tetrazolyl substituents for highly selective fluorescence-based aqueous-phase explosive detection was also conducted. An unprecedented 2D 3-nodal topological network with AIE-active tetrazolyl-tetraphenylethene ligand exhibits promising application prospects in nitro-explosive detection.
Zhang et al. (Wed,) studied this question.