The molecular probe of rhodamine 6G hydrazide(R6GH),a derivative of rhodamine 6G,was used to investigate its up/down conversion luminescence in methanol/water mixed solvent and its application in hypochlo-rite detection.In addition to the traditional fluorescence emission under the 524 nm excitation,we found that this molecular probe exhibited fluorescence emission at 728 nm under 650 nm excitation.Furthermore,under pulsed laser excitation at 835 nm,a two-photon absorption upconversion emission at 554 nm was observed.All these three emission modes responded to hypochlorite ions,with increasing emission intensity and showing a good linear relationship with the concentration of hypochlorite ions.As for the detection performance,the downconversion de-tection mode had higher sensitivity,while the upconversion detection mode had a wider range of concentration response.This multi-mode detection probe based on up/down conversion luminescence under multi-wavelength excitation can be achieved without additional components,allowing for flexible adjustment of excitation wave-lengths to meet the requirements of different application occasions,providing a new approach for hypochlorite de-tection in complex environments.
维普
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