TY - JOUR
T1 - Periodic mesoporous organosilicas consisting of 3D hexagonally ordered interconnected globular pores
AU - Vercaemst, Carl
AU - Friedrich, Heiner
AU - de Jongh, Petra E.
AU - Neimark, Alex V.
AU - Goderis, Bart
AU - Verpoort, Francis
AU - Van der Voort, Pascal
PY - 2009/4/9
Y1 - 2009/4/9
N2 - A new family of periodic mesoporous organosilieas with 100% E-configured ethenylene-bridges and controllable pore systems is presented. 2D hexagonally ordered hybrid nanocomposites consisting of cylindrical pores are obtained, of which some are filled with solid material. The architectural composition of these hybrid materials can be accurately controlled by fine-tuning the reaction conditions; that is, there is a unique correlation between the reaction mixture acidity and the amount of confined mesopores. This correlation is related to the filling of the pores with solid material whereby the length of the pore channels can be tailored. Hereby the mesophase either shifts toward long-ranged 2D hexagonally ordered open cylinders or toward 3D hexagonally ordered interconnected spheres. The synthesis of these organic - inorganic hybrid composites is straightforward via the direct condensation of E-l,2-bis(triethoxysilyl)ethene, in the presence of pluronic P123. The true nature of these periodic mesoporous organosilicas is disclosed by means of nitrogen gas physisorption, nonlocal density functional theory, SAXS, TEM, and electron-tomography.
AB - A new family of periodic mesoporous organosilieas with 100% E-configured ethenylene-bridges and controllable pore systems is presented. 2D hexagonally ordered hybrid nanocomposites consisting of cylindrical pores are obtained, of which some are filled with solid material. The architectural composition of these hybrid materials can be accurately controlled by fine-tuning the reaction conditions; that is, there is a unique correlation between the reaction mixture acidity and the amount of confined mesopores. This correlation is related to the filling of the pores with solid material whereby the length of the pore channels can be tailored. Hereby the mesophase either shifts toward long-ranged 2D hexagonally ordered open cylinders or toward 3D hexagonally ordered interconnected spheres. The synthesis of these organic - inorganic hybrid composites is straightforward via the direct condensation of E-l,2-bis(triethoxysilyl)ethene, in the presence of pluronic P123. The true nature of these periodic mesoporous organosilicas is disclosed by means of nitrogen gas physisorption, nonlocal density functional theory, SAXS, TEM, and electron-tomography.
UR - http://www.scopus.com/inward/record.url?scp=65249117748&partnerID=8YFLogxK
U2 - 10.1021/jp810316y
DO - 10.1021/jp810316y
M3 - Article
AN - SCOPUS:65249117748
SN - 1932-7447
VL - 113
SP - 5556
EP - 5562
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 14
ER -