Luminescence and white-light emitting luminescent sensor of tetrafluoroterephthalatelanthanide metal-organic frameworks

作者：Han, Yongqiang; Yan, Pengfei; Sun, Jingwen; An, Guanghui^*; Yao, Xu; Li, Yuxin; Li, Guangming^*

来源：Dalton Transactions, 2017, 46(14): 4642-4653.

DOI：10.1039/c7dt00215g

• NEAR-INFRARED-LUMINESCENCE
• COORDINATION POLYMERS
• LANTHANIDE COMPLEXES
• CRYSTAL-STRUCTURES
• SM(III) FRAMEWORK
• NIR LUMINESCENCE
• ENERGY-TRANSFER
• EMISSION
• IONS
• SENSITIZATION

Two types of sixteen complexes 1-16, namely, {[Ln(TFBDC)(1.5)(H2O)].2H(2)O}(n) [Ln = Pr (1) and Nd (2)] and {[Ln(TFBDC)(1.5)(H2O)(2)].H2O}(n) [Ln = Ce (3), Pr (4), Nd (5), Sm (6), Eu (7), Gd (8), Tb (9), Dy (10), Ho (11), Er (12), Yb (13) and Lu (14)], {[Dy0.281Eu0.719(TFBDC)(1.5)(H2O)(2)].H2O)(n) (15) and {[Gd0.871Eu0.103Tb0.026(TFBDC)(1.5)(H2O) 2].H2O)(n) (16), were isolated by the reaction of LnCl(3).6H(2)O with 2,3,5,6-tetrafluoroterephthalic acid (H2TFBDC). X-ray crystallographic analysis revealed that 1 and 2 exhibit 3D network structures and complexes 3-14 feature 2D network structures formed via three different coordination modes of the ligand. Luminescence spectra revealed that these complexes exhibit broad-spectrum luminescence from the visible to the near-infrared (NIR) region. Unexpectedly, complex 1 exhibits a unique NIR luminescence pattern and the longest lifetime among reported molecular praseodymium complexes. White-light emission was realized via three approaches using the single-component complex 6 (Sm), the two-component complex 15 (Eu and Dy) and the three-component complex 16 (Eu, Tb and Gd). Complex 9 exhibits high sensitivity and selectivity in its luminescence response to benzaldehyde, which provides a promising luminescent sensor for the detection of benzaldehyde.

• 出版日期2017-4-14
• 单位黑龙江大学