Transparent films based on functionalized Poly(ionic liquids) coordinating to photoactive Lanthanide(Eu~(3+),Tb~(3+)) and Poly(methyl methacrylate): Luminescence and chemical sensing

摘要

Two kinds of hybrid luminescence films ([C8VIM][Eu (nta)(4)]@PMMA and [C8VIM][Tb (acac)(4)]@PMMA) have been synthesized by the copolymerization of MMA with lanthanide functionalized ionic liquid [C8VIM][Eu (nta)(4)]. The structure and composition of the as-synthesized films have been characterized by (HNMR)-H-1, XPS, FTIR, UV-vis, XRD, TGA and SEM. In addition, the photophysical properties of as-synthesized films have been investigated in detail by luminescence spectroscopy. It was found that the transparent and thermal stability of as- synthesized films are improved by the long chains of PMMA. More significantly, [C8VIM][Eu (nta)(4)]@PMMA exhibits the improvement of photo physical properties (eta = 52.6%) and is selected as the representative sample to examine the potential fluorescence sensing of metal ions and anions. It has been showed highly selective and sensitive fluorescence sensing for Cu2+ and CrO42-. Meanwhile, [C8VIM][Eu (nta)(4)]@PMMA exhibits a good stability in the aqueous solution, which is further used as fluorescence probe for detecting CO32-. The good stability, sensitive fluorescence response and good mechanical processing properties of [C8VIM][Eu (nta)(4)]@PMMA show a great potential to establish a fast response anion and cationic of aqueous solution fluorescence colorimetric sensor devices.