Multi-responsive luminescent probes for Fe3+, Cr2O72- and acetylacetone with Cd-MOF based on tris(3′-F-4′-carboxybiphenyl)amine and trans-1,2-bis(4-pyridyl)ethene

A novel luminescent metal-organic framework (MOF) with the formula of [Cd-2(TFBA)(HCOO)(bpe)H2O]n (MOF-1) (H(3)TFBA = tris(3' F carboxybiphenyl)amine, bpe = trans-1,2-bis(4-pyridyl)ethene) has been designed and synthesized through solvothermal reaction. The Cd-MOF crystallizes in the monoclinic space group P2(1)/C, exhibiting non-interpenetrating 3D microporous structure. MOF-1 displays outstanding stability in water and other common small organic solvents. Ifs noteworthy that water suspension of MOF-1 exhibits good fluorescence performance, which was effectively quenched by Fe3+ and Cr2O72- with the Ksv values of 1.15 x 10(6) M-1 and 1.22 x 10(4) M-1, respectively. Moreover, MOF-1 is capable of sensing acetylacetone in DMF with obvious luminescence enhancement and the detection limit is 37.30 ppm. Combined with anti-interference capability and reusability, MOF-1 can be considered as a potential luminescent sensor for detection of Fe3+ and Cr(2)O(7)(2)(- )in H2O solution and acetylacetone in DMF. Additionally, the possible luminescent quenching and enhancement mechanisms were also discussed.

Automated summary

A novel luminescent metal-organic framework, MOF-1, with outstanding stability and good fluorescence performance in water suspension was designed and synthesized. It can detect acetylacetone in DMF with significant luminescence enhancement.