All-in-one type ESIPT-active multi-stimuli responsive 7-diethylamino-4-hydroxycoumarin-rhodamine B hydrazone as molecular switches and the reversible photochromic features of its zinc ensemble

A new “all-in-one” type ESIPT-active multifunctional fluorescent compound (DHCRH) exhibits methanol responsiveness, AIE, acidochromism and mechanochromic features. Interestingly its zinc ensemble shows reversible photochromic behaviour.