A novel metal-organic framework based on mixed ligands as a highly selective luminescent sensor for Cr2O72- and nitroaromatic compounds

摘要

A novel 3D metal-organic framework, namely [Mn-2(HBTC)(2)(TIAB)](n), was successfully synthesized by mixing two rigid ligands 1,2,4,5-tetrakis(1-imidazolyl)benzene (TIAB) and 1,3,5-benzenetricarboxylic acid (H3BTC). The resultant sample was investigated in detail by single crystal X-ray diffraction, elemental analysis of C, H and N, powder X-ray diffraction pattern, thermogravimetric analysis, and luminescent properties. In virtue of its stability and luminescence properties, the resultant [Mn-2(HBTC)(2)(TIAB)](n) can be applied as a bifunctional luminescent sensor for Cr2O72- and nitroaromatic compounds. In addition, it can be recycled at least four times due to the excellent stability.