首页|Functionalization of mesoporous silica nanoparticles through one-pot co-condensation in w/o emulsion
Functionalization of mesoporous silica nanoparticles through one-pot co-condensation in w/o emulsion
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
In this work, three different functionalized mesoporous silica nanoparticles (MSNs) were synthesized through the co-condensation synthesis in oil/water emulsion. Hexadecyltrimethoxysilane, triethoxy-3-(2-imidazolin-1-yl) propylsilane and (3-mercaptopropyl)triethoxysilane were used as organo-substituted silica precursors with variable molar ratio with respect to tetraethylorthosilicate (TEOS, 1:4,1:9,1:19). The occurred functionalization was investigated by Infrared Spectroscopy and FT-Raman and ~(29)Si {~1H} CP-MAS-NMR spectroscopy. Results show that the three materials were successfully functionalized. The influence of the different pendant groups and their concentration on the mesostructured pore organization of the obtained nanoparticles respect to the non-functionalized mesoporous silica was evaluated by means of Transmission Electron Microscopy and N2 sorption measurements. Bulky aliphatic C16 chains, especially in higher concentration, causes severe changes in mesoporous structure, leading to a more heterogeneous material. The imidazoline groups, instead, change the mesostructured morphology of the pores to an irregular but more interconnected one, while the presence of mercaptopropyl groups does not bring significant modifications. The different structural modifications in pore morphology observed between the samples is due to the different interactions between derivatized silica precursors and the components of the emulsion.
Dipartimento Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, STEBICEF and INSTM UdR, Palermo, Universith di Palermo, Viale delle Scienze Ed. 17, 90128, Palermo, Italy
NSTL
