Multi-stimuli response of a novel half-cut cruciform and its application as a security ink

A novel V-shaped compound ( E )-2′-[2-(benzo[ d ]thiazol-2-yl)vinyl]- N , N -dimethyl-(1,1′-biphenyl)-4-amine, a half-cut cruciform with reversible and highly contrasted fluorochromism in response to external force and surrounding pH stimuli along with ICT and AIE effects in highly polar solvents, can be used as a security ink.