Two "turn on" fluorescence probes based on nitroso recognition group for detecting hydrogen sulfide.

Hydrogen sulfide is a vital signaling molecule which holds a pivotal position in numerous biological functions. In this research, two novel "OFF-ON" fluorescence probes named YNO and TNO were designed based on the nitroso recognition group to detect H2S. Both YNO and TNO performed outstanding response rate and linear relationship between the fluorescence intensity and the concentration of H2S. YNO possessed larger Stokes shift and longer emission wavelength. TNO had lower limit of detection. In addition, YNO was successful applied to sense endogenous and exogenous H2S and target endoplasmic reticulum (ER) in Hela cells.