A europium(III)-based metal-organic framework as a naked-eye and fast response luminescence sensor for acetone and ferric iron

作者：Wang, Jian; Wang, Jingru; Li, Yang; Jiang, Min; Zhang, Lingwen; Wu, Pengyan^*

来源：New Journal of Chemistry, 2016, 40(10): 8600-8606.

DOI：10.1039/c6nj02163h

• FLUORESCENT-PROBE
• COORDINATION POLYMERS
• FE3+
• SITES
• COMPLEXES
• MOLECULES
• FE(III)
• IONS
• ACID
• MOF

A europium(III)-based metal-organic framework {[Eu(bpda)(1.5)]center dot H2O}(n) Eu-BPDA (BPDA = biphenyl-2,2'-dicarboxylic acid) has been solvothermally synthesized and structurally characterized. The MOF has a three-dimensional architecture and shows bright red-emission even in water solution. It is found that the MOF exhibits a significant fluorescence quenching effect toward acetone. In particular, it possesses a fast response of 5 s, high sensitivity with an EC50 of 0.028 vol%, which is below the occupational exposure limit of acetone stipulated by the American Conference of Governmental Industrial Hygienists (ACGIH), naked-eye visualization and easy recycling. Moreover, it could also be used as an excellent naked-eye fluorescence sensor for Fe3+ ions with a Stern-Volmer constant K-SV = 1.25 x 10(4) L mol(-1) and unusually high selectivity in pure water. The fluorescence quenching mechanism for acetone and Fe3+ ions was also investigated, giving a rare example that worked as an efficient dual sensor for acetone and Fe3+ detection.

• 出版日期2016