Abstract
Ternary europium complex Eu(tta)3phen was covalently bonded with the general mesoporous material SBA-15 and SBA-15-type of periodic mesoporous organosilica (PMO) material via impregnation of Eu(tta)3·2H2O into phen-S15 and phen-PMO, respectively, through a ligand exchange reaction. The parent materials of phen-S15 and phen-PMO were synthesized by co-condensation of tetraethylorthosilicate (TEOS) or 1,2-bis(triethoxysilyl)ethane (BTESE) and the functionalized chelate ligand 5-(N,N-bis(3-triethoxysilyl)propyl)ureyl-1,10-phenanthroline (phen-Si) in the presence of Pluronic P123 surfactant as template, which were confirmed by SEM, XRD, FTIR, 29Si CP-MAS NMR, and N2 adsorption measurements. The photophysical properties of the hybrids, such as the photoluminescence (PL) spectra, PL intensities, symmetry properties, luminescence decay times, and Judd−Ofelt parameters, were investigated in detail. Compared to the sample of Eu(tta)3phen-PMO, the mesoporous hybrid material Eu(tta)3phen-S15 exhibited longer luminesc...
Published Version
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