| Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
| Art der Begutachtung: | Peer review (Publikation) |
| Titel: | Accessibility of amino groups in postsynthetically modified mesoporous silica |
| Autor/-in: | Ritter, Hanna Brühwiler, Dominik |
| DOI: | 10.1021/jp901983j |
| Erschienen in: | The Journal of Physical Chemistry C |
| Band(Heft): | 113 |
| Heft: | 24 |
| Seite(n): | 10667 |
| Seiten bis: | 10674 |
| Erscheinungsdatum: | 2009 |
| Verlag / Hrsg. Institution: | American Chemical Society |
| ISSN: | 1932-7447 1932-7455 |
| Sprache: | Englisch |
| Schlagwörter: | 2009; ICBC; Mesopores; Accessibility |
| Fachgebiet (DDC): | 540: Chemie |
| Zusammenfassung: | The accessibility of amino groups in postsynthetically functionalized mesoporous silica MCM-41, MCM-48, and SBA-15 is investigated by reaction with fluorescein isothiocyanate (FITC). The quantitative analysis of the surface-grafted amino groups in relation to the amount of coupled FITC over a wide range of loadings affords information about potential pore blocking. In the pore diameter domain of 3-4 nm, the actual pore size of materials with a one-dimensional channel system (MCM-41) strongly affects the FITC coupling yield and the distribution of the anchored fluorescein moieties. In the case of SBA-15 (7.6 nm pore diameter), the accessibility of the grafted amino groups is similar to what is expected for a material with a completely open surface. However, grafting in the intrawall micropores of SBA-15 leads to a substantial fraction of inaccessible amino groups. As a direct consequence of short channel lengths and large external surface area, excellent accessibility is also observed for nanometer-sized MCM-41 (3.2 nm pore diameter). |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/2650 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | Lizenz gemäss Verlagsvertrag |
| Departement: | Life Sciences und Facility Management |
| Organisationseinheit: | Institut für Chemie und Biotechnologie (ICBT) |
| Enthalten in den Sammlungen: | Publikationen Life Sciences und Facility Management |
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Ritter, H., & Brühwiler, D. (2009). Accessibility of amino groups in postsynthetically modified mesoporous silica. The Journal of Physical Chemistry C, 113(24), 10667–10674. https://doi.org/10.1021/jp901983j
Ritter, H. and Brühwiler, D. (2009) ‘Accessibility of amino groups in postsynthetically modified mesoporous silica’, The Journal of Physical Chemistry C, 113(24), pp. 10667–10674. Available at: https://doi.org/10.1021/jp901983j.
H. Ritter and D. Brühwiler, “Accessibility of amino groups in postsynthetically modified mesoporous silica,” The Journal of Physical Chemistry C, vol. 113, no. 24, pp. 10667–10674, 2009, doi: 10.1021/jp901983j.
RITTER, Hanna und Dominik BRÜHWILER, 2009. Accessibility of amino groups in postsynthetically modified mesoporous silica. The Journal of Physical Chemistry C. 2009. Bd. 113, Nr. 24, S. 10667–10674. DOI 10.1021/jp901983j
Ritter, Hanna, and Dominik Brühwiler. 2009. “Accessibility of Amino Groups in Postsynthetically Modified Mesoporous Silica.” The Journal of Physical Chemistry C 113 (24): 10667–74. https://doi.org/10.1021/jp901983j.
Ritter, Hanna, and Dominik Brühwiler. “Accessibility of Amino Groups in Postsynthetically Modified Mesoporous Silica.” The Journal of Physical Chemistry C, vol. 113, no. 24, 2009, pp. 10667–74, https://doi.org/10.1021/jp901983j.
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