Silsesquioxane-Based Nanoparticles Formed via Hydrolytic Condensation of Organotriethoxysilane Containing Hydroxy Groups

摘要: Silsesquioxanes-based nanoparticles synthesized by hydrolytic condensation of a functionalized precursor, N,N-di(2,3-dihydroxypropyl)(aminopropyl)triethoxysilane, (HOCH2CH(OH)CH2)2NCH2CH2CH2Si(OCH2CH3)3, were characterized using MALDI-TOF MS, NMR, elemental analysis, FT-IR, transmission electron microscopy (TEM), and scanning force (SFM). MS analysis indicated that the product consists many species having 12−18 Si atoms with different numbers intramolecular cyclizations, Si−O−C bonds are formed through reaction SiOH (or SiOEt) groups hydroxyl functionalities an organic moiety bonded to atom. The high number intermolecular cyclization (f ≥ 0.5 at 10 n 7) predominantly detected, suggesting mainly complete incomplete cagelike structures. chemical composition was consistent calculated from structure, (R−SiO1.5)n, indicating belong famil...