2023
DOI: 10.1002/cctc.202300449
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Hydrophobicity Boosts Catalytic Activity: The Tailoring of Aluminosilicates with Trimethylsilyl Groups**

Abstract: Introducing organic groups into metal silicate catalysts and thus supposedly changing the surface hydrophobicity has been shown to enhance the catalyst performance in various reactions. However, the organic groups introduction does not unambiguously guarantee hydrophobicity control. Therefore, a thorough characterization is necessary to provide a complete view of the interaction between the catalyst surface, reactants, and products. Herein, an aluminosilicate catalyst with welldispersed Al atoms was prepared v… Show more

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Cited by 3 publications
(3 citation statements)
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“…In the case of py–Al­(OCUBE) 3 , the observed C Q min = 11.8 MHz maps very well to the previously reported value of 9.4 ± 0.5 MHz for the analogous sites observed after the adsorption of pyridine onto dehydrated zeolites . Similarly, the observed C Q min = 10.1 MHz for TEPO–Al­(OCUBE) 3 and 4.8 MHz for [AlO 4 ] − compare well to the reported values of 11.3 and 4.6 MHz, assigned to highly distorted sites of the corresponding type in synthetic amorphous aluminosilicate materials after the adsorption of TEPO . The larger positive deviations of C Q min compared to | C Q DFT | for L = Et 3 N (2.3 MHz) and TEPO (2.1 MHz) could be explained as an additional disorder due to the conformational freedom of the pendant ethyl substituents of the two ligands.…”
Section: Resultssupporting
confidence: 89%
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“…In the case of py–Al­(OCUBE) 3 , the observed C Q min = 11.8 MHz maps very well to the previously reported value of 9.4 ± 0.5 MHz for the analogous sites observed after the adsorption of pyridine onto dehydrated zeolites . Similarly, the observed C Q min = 10.1 MHz for TEPO–Al­(OCUBE) 3 and 4.8 MHz for [AlO 4 ] − compare well to the reported values of 11.3 and 4.6 MHz, assigned to highly distorted sites of the corresponding type in synthetic amorphous aluminosilicate materials after the adsorption of TEPO . The larger positive deviations of C Q min compared to | C Q DFT | for L = Et 3 N (2.3 MHz) and TEPO (2.1 MHz) could be explained as an additional disorder due to the conformational freedom of the pendant ethyl substituents of the two ligands.…”
Section: Resultssupporting
confidence: 89%
“… 8 Similarly, the observed C Q min = 10.1 MHz for TEPO–Al(OCUBE) 3 and 4.8 MHz for [AlO 4 ] − compare well to the reported values of 11.3 and 4.6 MHz, assigned to highly distorted sites of the corresponding type in synthetic amorphous aluminosilicate materials after the adsorption of TEPO. 55 The larger positive deviations of C Q min compared to | C Q DFT | for L = Et 3 N (2.3 MHz) and TEPO (2.1 MHz) could be explained as an additional disorder due to the conformational freedom of the pendant ethyl substituents of the two ligands. As illustrated above, the experimental fits of the asymmetry parameter η avg for the L–Al(OCUBE) 3 sites are highly unreliable with values generally larger or comparable to the corresponding predicted η DFT .…”
Section: Resultsmentioning
confidence: 97%
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