Characterization of an ultrathin polymer5 optode and its application to temperature sensors based on luminescent europium complexes

摘要

This paper focuses on an ultrathin p[olymer optode containing europium complexes (pDDA-Eu(TTA)_3Ph3en)).Ultrathin films were prepared by the Langmuir-Blodgett (LB) technique;a mixed solution of poly-(N-dodecylacrylamide) (pDDA) and tris(4,4,4-trifluoro-1-(2-thienyl)-1,3-butanediono)-1,10-phenanthroline europium(III) (Eu(TTA)_3Phen) was spread onto water subphase and the condensed monolayer was transferred onto a solid substrate.The spectroscopic properties and layer structure of p(DDA-Eu(TTA)-3Phen) LB flms were investigated by UV-Vis spectroscopy,fluorescence spectroscopy,time-resolved luminescence decay measurement,X-ray diffraction,and surface plasmon spectroscoy.It was found that europium complexes were uniformly distributed in the ultrathin films compared with a cast film.The p(DDA-Eu(TTA)_3Phen) optodes showed efficient sensitivity to temperature in the range of 320 to 370 K.The findings demonstrate that the p(DDA-Eu(TTA)_3Phen) optode is a good candidate for temperature sensitive sensors.