All chemicals were obtained from commercial suppliers and directly used without further puri cation. 7-(diethylamino)coumarin-3-carbohydrazide was prepared according to the literature method [16] .
Analytical grade acetonitrile and deionized water were used as solvents for spectral measurements. 1 H NMR and 13 C NMR spectra were recorded on a Bruker Av400 NMR spectrometer. HRMS spectra were performed on a Shimadzu LCMS-IT-TOF apparatus. Fluorescence spectra were taken on a Hitachi F-7000 uorescence spectrometer. The X-ray diffraction data was collected on an Agilent Gemini A Ultra diffractometer (MoKα, λ = 0.71073 Å). Images of cells were obtained using a Nikon A1 confocal laser scanning microscope.
Analytical grade acetonitrile and deionized water were used as solvents for spectral measurements. 1 H NMR and 13 C NMR spectra were recorded on a Bruker Av400 NMR spectrometer. HRMS spectra were performed on a Shimadzu LCMS-IT-TOF apparatus. Fluorescence spectra were taken on a Hitachi F-7000 uorescence spectrometer. The X-ray diffraction data was collected on an Agilent Gemini A Ultra diffractometer (MoKα, λ = 0.71073 Å). Images of cells were obtained using a Nikon A1 confocal laser scanning microscope.