Tunable Emission and Selective Luminescence Sensing in a Series of Lanthanide Metal–Organic Frameworks with Uncoordinated Lewis Basic Triazolyl Sites

• DOI: 10.1021/acs.cgd.7b01453
• Publication Date: 2018-01-04T21:49:26Z
• Authors: Zhen-Jing Li; Xiu-Yuan Li; Yang-Tian Yan; Lei Hou; Wen-Yan Zhang; Yao-Yu Wang
• Keywords: Nitrobenzene; Isostructural; Binodal

Four isostructural lanthanide metal–organic frameworks (Ln-MOFs) {[Ln(L)1.5(H2O)]·4H2O}n (1-Ln) (Ln = Sm, Eu, Gd, and Tb) have been successfully synthesized under solvothermal conditions with 2-(1H-1,2,4-triazol-1-yl) terephthalic acid (H2L) Ln(NO3)3·nH2O (n 0, 6). 1-Ln shows a binodal (3,8)-connected three-dimensional framework that possesses one-dimensional pore channel decorated uncoordinated Lewis basic triazolyl sites. 1-Eu 1-Tb exhibit bright red green emissions absolute quantum yields of 9.1% for 53.3% 1-Tb. The luminescence explorations demonstrated exhibits high quenching efficiency low detection limit sensing Fe3+ nitrobenzene. Meanwhile, the fluorescence intensity quenched samples was resumed after washing ethanol, which highly selective recyclable Importantly, by doping different concentrations Eu3+ Tb3+ ions, series dichromatic doped 1-EuxTb1-x MOFs were fabricated, showing an unusual fluent change color from green, yellow, orange, orange-red, red.