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One-pot synthesis and surface modifications of organically modified silica (ORMOSIL) particles having multiple functional groups

Jung, Chan Yoon, Kim, Jung Soo, Kim, Ha Young, Ha, Jung Min, Kim, Yong Hyun, Koo, Sang Man
Journal of colloid and interface science 2012 v.367 no.1 pp. 67-73
Fourier transform infrared spectroscopy, X-ray diffraction, chemical reactions, fluorescence, fluorescent dyes, nuclear magnetic resonance spectroscopy, physical properties, scanning electron microscopy, silica, stable isotopes, synthesis, thermogravimetry, transmission electron microscopy
Here we report a facile one-pot synthetic method for organically modified silica (ORMOSIL) particles having multiple functional groups and demonstrate the homogeneous distribution of functional groups in ORMOSIL particles by chemical reactions of each surface functional group with fluorescent dyes such as fluroescamine and rhodamine B isothiocyanate. Dye-tagged ORMOSIL particles having tri-functional groups are exhibited two fluorescent emission peaks at 475 (blue) and 570nm (red), indicating the positions of functional groups. The surface reaction of these functionalized ORMOSIL particles with various organic or inorganic materials not only endowed additional functionalities and physical properties, but also produced metallic hybrid composite particles. Chemical and physical properties of functionalized ORMOSIL particles were characterized by FT-IR, solid state ¹³C and ²⁹Si NMR, thermogravimetric analysis (TGA), electron microscopy (SEM and TEM), and X-ray diffraction (XRD) analysis.