Abstract
Recently, there has been significant interest in multi-functional organic materials due to their unique properties and potential applications. One such material is PAD, an acyl-hydrazone derivative substituted with –OH and a triphenylamine group. PAD is capable of forming stable organogels in various solvents such as benzene, chlorobenzene, dichloromethane, and 1,2-dichloroethane. The organogels formed in benzene, dichloromethane, and 1,2-dichloroethane exhibit gelation-induced emission enhancement (GIEE) behavior, while not very obvious for chlorobenzene organogel. Additionally, PAD displays fluorescence switching behavior in response to changes in solvent and temperature. PAD-A emits blue fluorescence around 460 nm, while PAD-T emits green fluorescence at 485 nm. Interestingly, when PAD-T is annealed at 170 °C for 15 min, the fluorescence color changes from green to blue, and the emission wavelength shifts from 485 nm to 444 nm. Furthermore, regardless of whether it is in a solid, organogel, or solution form, PAD exhibits fluorescence quenching properties when exposed to acid (TFA) due to the protonation effect.
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