Tuning molecular adsorption in SBA-15-type periodic mesoporous organosilicas by systematic variation of their surface polarity

Chemical Science
Hyunjin MoonSusannah L Scott

Abstract

Surface polarity plays a key role in controlling molecular adsorption at solid-liquid interfaces, with major implications for reactions and separations. In this study, the chemical composition of periodic mesoporous organosilicas (PMOs) was varied by co-condensing Si(OEt)4 with organodisilanes, to create a homologous series of materials with similar surface areas, pore volumes, and hydroxyl contents. Their relative surface polarities, obtained by measuring the fluorescence of a solvatochromic dye, cover a wide range. In this series of PMO materials, EPR spectra of tethered nitroxide radicals show monotonically decreasing mobility as larger fractions of the radicals interact strongly with increasingly non-polar surfaces. The surface properties of the materials also correlate with their affinities for organic molecules dissolved in various solvents. The most polar PMO has negligible affinity for phenol, p-cresol, or furfural when these molecules are dissolved in water. However, stronger solute-surface interactions and favor adsorption as the surface polarity decreases. The trend is reversed for furfural in benzene, where weaker solvent-surface interactions result in higher adsorption on polar surfaces. In DMSO, furfural adsorptio...Continue Reading

References

Nov 15, 2002·Chemical Communications : Chem Comm·Yasutomo Goto, Shinji Inagaki
Sep 29, 2005·Journal of Magnetic Resonance·Stefan Stoll, Arthur Schweiger
Jul 31, 2007·The Journal of Physical Chemistry. B·Nicolas GiovambattistaPeter J Rossky
Jun 19, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Jean-Paul GallasOlivier Miserque
Jun 24, 2009·Environmental Science & Technology·Marco Keiluweit, Markus Kleber
Jul 30, 2009·Physical Chemistry Chemical Physics : PCCP·Boris DzikovskiJack Freed
Sep 14, 2011·Journal of Colloid and Interface Science·Raul Ocampo-PerezRosa M Guerrero-Coronado
May 3, 2012·Journal of the American Chemical Society·Paula A ZapataDaniel E Resasco
Nov 29, 2012·Physical Chemistry Chemical Physics : PCCP·Matthias IdePascal Van Der Voort
Sep 13, 2014·Angewandte Chemie·Max A MellmerJames A Dumesic
Sep 19, 2014·Physical Chemistry Chemical Physics : PCCP·Feng LinSabine Van Doorslaer
Jul 19, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Dilini Singappuli-ArachchigeIgor I Slowing
Mar 7, 2018·Proceedings of the National Academy of Sciences of the United States of America·Alex M SchraderSongi Han
Mar 14, 2018·Journal of the American Chemical Society·Justin P JahnkeBradley F Chmelka
Jan 13, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jinesh C ManayilKaren Wilson

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Citations

Jul 28, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Gerd Buntkowsky, Michael Vogel
Sep 3, 2021·ACS Omega·Paola Rodríguez-EstupiñanJuan Carlos Moreno-Piraján

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