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Bifunctional Mesoporous Organosilica Materials and Their Application in Catalysis : Cooperative Effects or Not?

Bifunctional Mesoporous Organosilica Materials and Their Application in Catalysis : Cooperative Effects or Not?

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Prüfsumme: MD5:4635f9d22017fb675e502d29c00eb572

KUSCHEL, Andreas, Malte DRESCHER, Thomas KUSCHEL, Sebastian POLARZ, 2010. Bifunctional Mesoporous Organosilica Materials and Their Application in Catalysis : Cooperative Effects or Not?. In: Chemistry of Materials. 22(4), pp. 1472-1482. ISSN 0897-4756. eISSN 1520-5002

@article{Kuschel2010Bifun-9713, title={Bifunctional Mesoporous Organosilica Materials and Their Application in Catalysis : Cooperative Effects or Not?}, year={2010}, doi={10.1021/cm903412e}, number={4}, volume={22}, issn={0897-4756}, journal={Chemistry of Materials}, pages={1472--1482}, author={Kuschel, Andreas and Drescher, Malte and Kuschel, Thomas and Polarz, Sebastian} }

The synthesis and characterization of a new periodically ordered mesoporous organosilica material (PMO) containing aniline as a bridging organic building block is presented. Furthermore, the coordination of the vanadyl cation [VO]2þ<br />to the carboxy function of a second PMO material containing benzoic acid is described. Bifunctional materials containing both mentioned functional groups in different amounts (HOOC-PhSi2O3)1-x(H2N-PhSi2O3)x have been prepared. The investigation of the dipolar coupling of [VO]2þ coordinated to the benzoic acid groups via EPR spectroscopy has been used to derive a detailed picture about the surface structure of the pores on the molecular scale. The catalytic activity of the bifunctional materials in a two-step chemical transformation is investigated as a possible application. The vanadyl group catalyzes the cleavage of an acetal followed by Knoevenagel condensation catalyzed by aniline.Acooperative effect of the two groups has been observed which is, however, not caused by a special interaction between the groups but is due to pure statistic reasons. 2011-03-24T18:13:53Z Bifunctional Mesoporous Organosilica Materials and Their Application in Catalysis : Cooperative Effects or Not? 2011-03-24T18:13:53Z application/pdf eng First publ. in: Chemistry of Materials 22 (2010), 4, pp. 1472-1482 Drescher, Malte Kuschel, Andreas deposit-license Polarz, Sebastian Polarz, Sebastian 2010 Kuschel, Andreas Kuschel, Thomas Kuschel, Thomas Drescher, Malte

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

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