Ratiometric fluorescent and colorimetric dual-modal sensing strategy for discrimination and detection of D2O from H2O

A ratiometric fluorescent and colorimetric dual-modal sensing strategy is reported to distinguish and detect D2O from H2O based on ground-state proton transfer for the first time. It enables synchronous dual-modal changes towards different fractions of D2O and facilitates naked-eye recognition. The probe can provide a more accurate monitoring protocol for D2O analysis.