Blue-emitting mesoporous films prepared via incorporation of luminescent Schiff base zinc(II) complex
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Highly fluorescent materials have been prepared by incorporation of a zinc complex in mesoporous silica thin films with ordered pore structure. The zinc complex has been introduced into the mesoporous materials via impregnation in an ethanol solution. The incorporation into the films has been monitored by UV–Vis, Fourier transform infrared spectroscopy and spectroscopic ellipsometry. After 18 h of immersion in the doping solution the films showed strong blue emission, increase in the refractive index. Leaching experiments performed by immersing the samples in ethanol or tetrahydrofuran have shown that the chromophore is retained in the porous matrix.
KeywordsPhotoluminescence Schiff base Mesoporous materials Thin films
This research was supported by the Italian Ministero dell’Università e della Ricerca (MiUR) through the Centro di Eccellenza CEMIF.CAL, FIRB, FIRB2003 (RBNE033KMA) and PRIN grants. The authors thank Dr. E. Vizza for part of the synthetic work.