A multi-responsive luminescent sensor based on a super-stable sandwich-type terbium(iii)–organic framework. Issue 39 (12th September 2016)

• Record Type: Journal Article
• Authors: Wen, Guo-Xuan; Han, Min-Le; Wu, Xue-Qian; Wu, Ya-Pan; Dong, Wen-Wen; Zhao, Jun; Li, Dong-Sheng; Ma, Lu-Fang
• Is Part Of: Dalton transactions. Volume 45:Issue 39(2016)
• Page Start: 15492
• Page End: 15499
• Publication Date: 2016-09-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt03057b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Multi-responsive fluorescent sensing for the recognition of different analytes at the molecular level is achieved using a Tb(iii )-based metal–organic framework (Tb-MOF ). Abstract : A super-stable multifunctional terbium(iii )–organic framework, namely {[Tb(TATAB) (H2 O)2 ]·NMP·H2 O} n (Tb-MOF, H3 TATAB = 4, 4′, 4′′- s -triazine-1, 3, 5-triyltri- m -aminobenzoic acid, NMP = N -methyl-2-pyrrolidone) was synthesized.Tb-MOF exhibits a 2Dsql structure with binuclear [Tb2 (COO)4 (H2 O)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 Fe 3+ and Cr2 O7 2− ions can be explained in terms of the competitive absorption mechanism. In addition, the luminescence intensity ofTb-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.