A multi-responsive luminescent sensor based on a super-stable sandwich-type terbium(iii)-organic framework

作者：Wen, Guo-Xuan; Han, Min-Le; Wu, Xue-Qian; Wu, Ya-Pan; Dong, Wen-Wen; Zhao, Jun; Li, Dong-Sheng^*; Ma, Lu-Fang^*

来源：Dalton Transactions, 2016, 45(39): 15492-15499.

DOI：10.1039/c6dt03057b

• METAL-ORGANIC FRAMEWORK
• LANTHANIDE COORDINATION POLYMERS
• SINGLE-CRYSTAL TRANSFORMATION
• BASIC PYRIDYL SITES
• NITROAROMATIC EXPLOSIVES
• SMALL MOLECULES
• PHASE DETECTION
• IONIC LIQUID
• PICRIC ACID
• SOLVENT

A super-stable multifunctional terbium(III)-organic framework, namely {[Tb(TATAB) (H2O)(2)]center dot NMP center dot H2O}(n) (Tb-MOF, H(3)TATAB = 4,4',4 ''-s-triazine-1,3,5-triyltri-m-aminobenzoic acid, NMP = N-methyl-2-pyrrolidone) was synthesized. Tb-MOF exhibits a 2D sql structure with binuclear [Tb-2(COO)(4)(H2O)(4)](2+) units as 4-connected nodes, and free water and NMP molecules are inserted between 2D layers through hydrogen-bonding interactions, forming a sandwich-type architecture. Observably, such a framework remains intact in a remarkable variety of environments such as common solvents and aqueous solutions with metal cations and inorganic anions, as well as with a pH ranging from 1 to 13. In particular, Tb-MOF can not only detect small organic molecules, metal cations and inorganic anions with high sensitivity and high selectivity, but also can accurately detect explosive 2-nitrophenol, 3-nitrophenol, 4-nitrophenol and 2,4,6-trinitrophenol in water. Its luminescence quenching response to Fe3+ and Cr2O72- ions can be explained in terms of the competitive absorption mechanism. In addition, the luminescence intensity of Tb-MOF is strongly correlated with the pH value in a pH range from 1 to 13. Thus, this material can be potentially used as a multi-responsive luminescent sensor.

• 出版日期2016
• 单位三峡大学; 洛阳师范学院