Novel luminescent hybrid materials by covalently anchoring 2-[3-(triethoxysilyl) propyl-1H-Benz [de]isoquinoline-1, 3(2H)-dione to bimodal mesoporous materials

We report on the synthesis of luminescent hybrid mesoporous materials (LHMS) by covalently anchoring 2-[3-(triethoxysilyl) propyl-1H-Benz [de]isoquinoline-1, 3(2H)-dione to bimodal mesoporous materials (BMMs) through postsynthesis methods. The resulting samples were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), N2 adsorption/desorption isotherms, transmission electron microscopy (TEM), 29Si NMR analysis, elemental analysis, and fluorescence measurements. The results revealed that luminescent organic molecules have been successfully introduced into the pore channels of BMMs without disrupting the structure, whereas the ordering degree of BMMs framework decreased after functionalization. The obtained materials (LHMS-10) showed excellent luminous performance, and the emission peak shifted to a lower wavelength in comparison with that of pure luminescent dyes (from 464 to 454 nm) because of the polarity of the silica matrix. And the amount of fluorescence molecule had some influence on the luminescence behavior, which was also investigated and discussed. It can be concluded that the fluorescence properties of the dye molecule can be controlled at will by the loading amount.