Salicylidene Schiff base assembled with mesoporous silica SBA-15 as hybrid materials for molecular logic function

The multiresponse molecule salicylidene Schiff base, N-3,5- dichlorosalicylidene-(S)-α-phenyIethylamine (SPEA), was fully encapsulated into the channel of the amino-functionalized mesoporous molecular sieve SBA-15 via the hydrogen bond assembly. This organic/inorganic hybrid material was well-characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, UV-vis diffusereflectance spectra, and photoluminescence spectra. The result indicates that, in sequence modification of aminopropyl and SPEA, the primary hexagonally ordered mesoporous structure of SBA-15 has not been destroyed. Stimulated by the inputs of OH ^-, Zn²⁺, and UV light, this hybrid material can present strong fluorescence outputs and perform a more complex logic function than in the solution system. The strong fluorescence emission makes its logic operation detectable and applicable.