One step synthesis of highly photoluminescent red light-emitting carbon dots from O-phenylenediamine and 2,4-diaminophenol as fluorescent probes for the detection of pH and Cr(vi)

A novel red light-emitting carbon dots (R-CDs) were prepared using 2,4-diaminophenol to enhance the fluorescence of O -phenylenediamine-based carbon dots. The R-CDs can be used for sensitive and selective detection of Cr( vi ) and measurement of pH.