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Luminescent Sensing and Catalytic Performances of a Multifunctional Lanthanide‐Organic Framework Comprising a Triphenylamine Moiety
Author(s) -
Wu Pengyan,
Wang Jian,
Li Yaming,
He Cheng,
Xie Zhong,
Duan Chunying
Publication year - 2011
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201100115
Subject(s) - triphenylamine , moiety , lanthanide , knoevenagel condensation , materials science , luminescence , aldehyde , photochemistry , metal organic framework , catalysis , salicylaldehyde , lewis acids and bases , absorption (acoustics) , polymer chemistry , organic chemistry , schiff base , chemistry , ion , adsorption , optoelectronics , composite material
A multifunctional lanthanide‐organic framework Tb− TCA (H 3 TCA = tricarboxytriphenylamine) comprising a triphenylamine moiety as an efficient luminescence sensitizer is synthesized by a solvothermal method and structurally characterized. Tb− TCA exhibits lanthanide‐based emission (540 nm) and triphenylamine emission (435 nm) after excitation at 350 nm and works as a luminescent chemosensor towards salicylaldehyde with a sensitivity of 10 ppm under optimized conditions. Tb− TCA features a high concentration of Lewis acid Tb 3+ sites and Lewis base triphenylamine sites on its internal surfaces; it thus enables both Knoevenagel and cyanosilylation reactions in a size‐selective fashion. The ratiometric fluorescent response towards aldehydes ( I 540 / I 435 ) demonstrates that the absorption of the porous material is size selective, and the interactions between the aldehyde molecules and the Tb 3+ ions play a dominant role in the absorption and activation of the aldehyde substrates. In particular, these studies provide opportunities to directly validate the sorption sites and the catalytic mechanism of the multifunctional Ln metal–organic framework material by luminescence.