Hybrid mesoporous organosilica material

Wahab, M.A., Kim, I.I., and Ha, C.S. (2004) Hybrid periodic mesoporous organosilica materials prepared from l,2-bis(triethoxysilyl)ethane and (3-cyanopropyl)triethoxysilane. Microporous Mesoporous Mater., 69, 19-27. 

In this research study an ordered, mesoporous hybrid organosilica material incorporating a biphei rl moiety was fabricated. The polymerization process was surfactant-mediated to ensure uniform pore pattern and narrow pore size distribution. The synthesis of the organosilica precursor was done and investigated by the research group of the Inorganic Synthesis and Computational Research Laboratory of Institute of Chemistry, Diliman, Quezon City. 

Hybrid Silica Materials Use of silica with periodically mesoporous organosilicas (PMOs) morphology, with organic groups as functionalization materials, for applications in sensing. 

Inagaki S., Guan S., Ohsuna T. and Terasaki O., An ordered mesoporous organosilica hybrid material with a crystal-like wall structure. Nature 416 (2002), pp. 304-307. 

S. Inagaki, S. Guan, T. Ohsuna, and O. Terasaki, An Ordered Mesoporous Organosilica Hybrid Material with a Crystal-like Wall Structure. Nature (London), 2002, 416, 304-307. 

N., Tani, T., and Inagaki, S. (2011) Syntheses, properties and applications of periodic mesoporous organosilicas prepared fi om bridged organosilane precursors. Chem. Soc. Rev., 40 (2), 789-800 (g) G6mez-Romero, P. and Sanchez, C. (eds) (2003) Functional Hybrids Materials, Wiley-VCH Verlag GmbH, Weinheim. 

Liu, J., Yang, H.Q., Kleitz, F., Chen, Z.G., Yang, T., Strounina, E., Lu, G.Q., and Qiao, S.Z. (2012) Yolk-shell hybrid materials with a periodic mesoporous organosilica shell ideal nanoreactors for selective alcohol oxidation. Adv. Funct Mater., 22, 591-599. 

K., Brandner, J., Biolley, C., Gaveau, P., Moreau, J.J.E., and Brunei, D. (2009) Hybrid materials and periodic mesoporous organosilicas containing covalently bonded organic anion and cation featuring MCM-41 and SBA-15 structure./. Am. Chem. Soc., 131,... 

Functionahzed Periodic Mesoporous Organosilicas (PMOs) can act as a solid acid catalyst. PMOs exhibit large specific surface areas, pore diameters of 2-50 nm and narrow pore size distributions. They are mostly synthesized with bridged bis-silanes with a general stracture (EtO)3-Si-R-Si-(OEt)3 (Figure 1) This bis-silane polycondensates around a template such as the surfactant PI23 (EO)2o(PO)7o(EO)2o After formation of the PMO, the template is removed by an extraction to reveal the pores of the hybrid material. ... 

Since the discovery of this first benzene-bridged mesoporous hybrid material with crystal-like pore walls, the series of organosilica precursors that give PMOs exhibiting molecular-scale periodicity was considerably extended. Kapoor et al. demonstrated with the formation of PMO products from the precursor 1,3 -bis(triethox-ysilyl)benzene (10) that a crystal-like organization of the organic bridges within the pore walls is not restricted to linear-substituted precursors.264... 

Figure 3.23 Photographs of powders of mesoporous hybrid materials with various conjugated ir-electron systems (from left to right) ethene-, benzene-, 1,4-divinylbenzene-, 4,4 -divinylstilbene-, and 4,4 -divinylazobenzene-bridged organosilicas. (See color insert.)...

The possible compositions for the walls of the ordered mesoporous materials go beyond the field of inorganic chemistry, and materials with hybrid organosilica walls have been prepared [81-84], Some mesoporous benzene-silica hybrids are stable at a temperature higher than 500 °C [84], Mesoporous materials prepared from polysilazanes and nonionic surfactants can be activated to form silicon carbonilride ceramics, which retain an ordered mesoporosity up to 1500 °C [85],... 

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