ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Investigation of environmental and concentration effects on fluorescence properties of AlQ3 using mesoporous silica and polyacrylate
Jalal Poostforooshan, Alireza Badiei, Gholamali Farzi, Hassan Goldooz, and Alfred P. Weber
School of Chemistry, College of Science, University of Tehran, Tehran, Iran
Abstract: In this work, for the first time, control over the position of maximum emission peak for fluorophore, using embedded tris(8-hydroxyquinoline) aluminum (AlQ3) complexes into different types of host materials, can be achieved. Moreover, the environmental and concentration effects on luminescent properties were studied. In this regard, different concentrations of AlQ3 were embedded into the poly(methyl methacrylate-co-butyl acrylate) (PMMA-co-PBuA) nanoparticles as organic host materials by emulsion polymerization. It is established that the dilution of AlQ3 in the polymer matrix leads to blue-shift of the luminescence maximum up to 0.32 eV compared to pure AlQ3. Moreover, AlQ3 was embedded in SBA-15 type mesoporous silica as an inorganic host material by physical adsorption. Finally, this functionalized mesoporous silica was incorporated into PMMA-co-PBuA transparent matrix by blending method to obtain Co-Poly-AlQ3-SBA-15 as organic–inorganic composite material. It was found that there is no significant wavelength shift on the maximum emission peak of the organic–inorganic composite at various concentrations of AlQ3-SBA-15. The prepared materials were characterized by powder X-ray diffraction (XRD), N2 adsorption–desorption, NMR, Fourier transform infrared (FT-IR), dynamic light scattering (DLS), scanning electron microscopy (SEM) and fluorescence spectra.
Keywords: Mesoporous silica; Polymer; Organic–inorganic composite; AlQ3; Fluorescence
Full paper is available at www.springerlink.com.
Chemical Papers 71 (10) 1887–1894 (2017)
Saturday, September 26, 2020