Preparation and properties of temperature sensitive paint based on Eu(DBM)3phen as probe molecule

Abstract Probe molecule Eu(DBM) 3 phen is made up of europium oxide (Eu 2 O 3 ), dibenzoylmethane (DBM) and 1,10-phenanthroline(phen). The temperature sensitive paint (TSP) was compounded by the polymerization of the probe molecule, methyl methacrylate (MMA) and the initiator of benzoyl peroxide (BPO). The structure, morphology, luminescence property of probe molecule and the temperature quenching property of the temperature sensitive paint (TSP) were characterized by infrared spectrometer, UV–vis spectrometer, scanning electron microscopy and fluorescence spectrometer respectively. The infrared spectrum and UV–vis spectra show that Eu and DBM form six membered rings, and Eu O coordinate bonds form. The nanocrystals are in sphere-like morphology with an average size of approximately 100 nm. Fluorescence spectra present that the performance of temperature quenching is excellent, what's more, TSP sample has different temperature sensitivity in various temperature scope. Particularly, under excitation of 286 nm, TSP has a highest temperature sensitivity between 50 and 60 °C, and the strongest fluorescence emission reaches a peak (615 nm). It indicated that probe molecule (Eu(DBM) 3 phen) has strong luminescent intensity and the temperature quenching properties of Eu(DBM) 3 phen/PMMA is good.