A highly sensitive and selective supramolecular fluorescent chemosensor for dichromate ion detection and application to real samples

In this study,we have synthesized and characterized a novel triazole based supramolecular chemosensor for the detection of dichromate. the fluorescent chemosensor 6 was synthesized using click reaction. the structure of chemosensor 6 was characterized using uvvisible,nmr and mass spectroscopic techniques. compound 6 displayed extremely high sensitivity to cr2o7 2- by fluorescence quenching mechanism. responses to other anions present in the solution,such as f-,cl-,br-,i-,n3 -,so4 2-,ch3coo-,clo4 -,no3 -,co3 2- and the effect of ph value on the efficiency of the sensor molecule have also been investigated. chemosensor 6 exhibits very good selectivity to cr2o7 2- ions over other anion tested as no significant interference was observed. under optimal conditions,its response was linearly proportional to the concentration of cr2o7 2- in a range from (10-100 μm) with determination coefficient of 0.9911. the proposed method was successfully applied to the direct determination of cr2o7 2-0 in real samples.