Characterization by IR spectroscopy of an hybrid sol–gel material used for photonic devices fabrication

Phosphonate Modified Silica for Adsorption of Co(II), Ni(II), Cu(II), and Zn(II)

“…Phosphonate is identified with band at 1257 cm -1 of P=O and band at 1028 cm -1 of P-O stretching vibration of organic phosphate [33]. Hydrocarbon is indicated with band at 2939 cm -1 due to CH asymmetric stretching vibration in CH 2 aliphatic group and band at 2885 cm -1 due to CH symmetric stretching vibration in CH 2 group of hydrocarbon [30]. The presence of hydrocarbon is also indicated by the band at 1435 cm -1 due to CH asymmetric bending vibration of CH 2 and band at 1285 cm -1 of CH 2 stretching vibration on Si-CH 2 -R group [30].…”

“…Hydrocarbon is indicated with band at 2939 cm -1 due to CH asymmetric stretching vibration in CH 2 aliphatic group and band at 2885 cm -1 due to CH symmetric stretching vibration in CH 2 group of hydrocarbon [30]. The presence of hydrocarbon is also indicated by the band at 1435 cm -1 due to CH asymmetric bending vibration of CH 2 and band at 1285 cm -1 of CH 2 stretching vibration on Si-CH 2 -R group [30]. The infrared spectra of PMS suggest that it consist of silica, phosphonate, and hydrocarbon.…”

Synthesis of Organosilica Films Through Consecutive Sol/Gel Process and Cationic Photopolymerization

“…In the presence of a diaryl iodonium salt as a cationic photoinitiator, the polysiloxane resins underwent facile cationic photopolymerization, leading to the formation of a solid cross-linked organic-inorganic hybrid film. In the continuity of this first investigation, further studies exploited a similar synthetic strategy via basic [11] or acid [12,13] sol/gel catalysis. In 2001, a novel family of siloxane-epoxy varying in the length of the spacer group between the siloxane backbone and the epoxy groups was synthesized by Crivello's team.…”

“…Etienne et al also employed a similar procedure with an epoxy cyclohexyl trimethoxysilane (TRIMO) to devise novel optical waveguides. [13,14] The incorporation of metal precursors was attempted by Copuroglu et al who reported the sol/gel synthesis of a mixed silica-titanium sol, which was subsequently photopolymerized. [15] Well-defined epoxy functionalized T 8 silsesquioxane core, sometimes designated POSS (polyhedral oligomeric silsesquioxane), were also photopolymerized with a similar approach.…”

“…In this case, only T n species can be assigned without differentiating between alkoxy or hydroxyl substituted groups. 29 Si and 13 C chemical shifts are both relative to tetramethylsilane. 1 H liquid NMR spectra were obtained on a Bruker DRX-300 instrument.…”