Study on Preparations and Fluorescent Properties of Rare Earth Complex with Property of Fluorescence Sensor

Europium chloride,2-thienylformyltrifluoroacetone and sodium silicate were used to synthesize new-style rare earth complex(Eu-TNS).By adding into dichloromethane solution containing Eu-TNS,the fluorescent intensities were enhanced gradually and regularly.High-resolution mass spectrometry was used to detect the formula of Eu-TNS,which belongs to multi-core rare-earth complex.Polarity of solution increasing by adding absolute ethanol will cause Eu-TNS to dissociate,which enhances the fluoresceot intensities of Eu-TNS solution.This rare earth complex Eu-TNS can be employed as fluorescence sensor to detect the content of ethanol in organic solvent.