A multiple selective chemosensor based on triazine nitrogen-rich derivative with Sequential“off-on-off”Fluorescence response to Fe3+, Cr2O72−, toluene, xylene, nitrobenzene and its application in water sample, vegetables and oil product

Abstract A novel triazine nitrogen-rich derivative fluorescent probe, 1,1′-(6-chloro-1,3,5-triazine-2,4-diyl)bis(1H-benzo[d] [1] , [2] , [3] triazole)(L), has been synthesized and had an aggregation-induced emission (AIE) property. It can emit white light in DMF/H2O (v:v = 24:1, pH 7) solution in the aggregated state. It successfully achieved for the efficient detection for Fe3+, Cr2O72−, nitrobenzene as a turn-off chemosensor in DMF/H2O. The detection of limit(LOD) for Fe3+, Cr2O72−, nitrobenzene on fluorescence response of the sensor can be as low as 2.10*10−5 M, 5.73*10−5 M, 1.24*10−5 mL, respectively. On the contrary, It is applied to detected for toluene and xylene as a turn-on chemosensor in DMF. The detection of limit (LOD) for toluene and xylene on fluorescence response of the sensor can be as low as 9.30*10−4 mL, 7.35*10−3 mL, respectively. The application of water sample and vegetables showed that the L had high sensitive detection for Fe3+ ions. Meanwhile the application of gasoline, diesel and engine oil showed that the L had high sensitive detection for toluene and xylene.