A phenothiazine derivative of FCO-CzS with changeable mechanoluminescence is reported, which, upon continuous mechanical stimulus, shows mechanoluminescent emission from blue to white and yellow. Careful analysis of the experimental results, coupled with the well-understood photoluminescence theory, show that the molecular conformation transition of the phenothiazine group from quasi-axial to quasi-equatorial is responsible for this dynamic mechanoluminescence effect.

Ap henothiazine derivative of FCO-CzS with changeable mechanoluminescence is reported, which,u pon continuous mechanical stimulus,s hows mechanoluminescent emission from blue to white and yellow.Careful analysis of the experimental results,c oupled with the well-understood photoluminescence theory,s how that the molecular conformation transition of the phenothiazine group from quasi-axial to quasi-equatorial is responsible for this dynamic mechanoluminescence effect.