A Fluorescent Anionic MOF with Zn4(trz)2 Chain for Highly Selective Visual Sensing of Contaminants: Cr(III) Ion and TNP.
Xiao-Xia JiaRu-Xin YaoFu-Qiang ZhangXian-Ming ZhangPublished in: Inorganic chemistry (2017)
Heavy-metal ions and nitroaromatic substances are highly toxic and harmful to human health and the ecological environment. It is an urgent issue to selectively detect and capture these toxic substances. By introducing the triazole ligand to the π-conjugated aromatic carboxylate system and borrowing the organic template open framework idea, a stable fluorescent framework [Me2NH2]4[Zn6(qptc)3(trz)4]·6H2O (1) (H4qptc = terphenyl-2,5,2'5'-tetracarboxylic acid, trz = 1,2,4-triazole) has been successfully synthesized, which features Zn4(trz)2 chain-based 3D anionic structure with channels filled by [Me2NH2]+ cations. It is worth noting that the material exhibits selective adsorption and recyclable detection of heavy-metal Cr3+ ion in aqueous solutions, which may be the synergy from the metal charge, bond ability of metal ions to carboxylate oxygen atom, and soft-hard acid-base properties. Furthermore, it can selectively sense of 2,4,6-trinitrophenol with a large quenching coefficient Ksv of 2.08 × 106 M-1.
Keyphrases
- heavy metals
- human health
- risk assessment
- quantum dots
- drinking water
- health risk assessment
- aqueous solution
- label free
- health risk
- room temperature
- living cells
- sewage sludge
- water soluble
- climate change
- energy transfer
- sensitive detection
- ionic liquid
- minimally invasive
- molecular dynamics
- metal organic framework
- magnetic resonance
- amino acid
- perovskite solar cells
- oxide nanoparticles