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A Novel and Versatile Grafting Procedure : Toward the Highest Possible Sulfonation Degree of Mesoporous Silica

Title data

Timm, Jana ; Marschall, Roland:
A Novel and Versatile Grafting Procedure : Toward the Highest Possible Sulfonation Degree of Mesoporous Silica.
In: Advanced Sustainable Systems. Vol. 2 (1 March 2018) Issue 3 . - No. 1700170.
ISSN 2366-7486
DOI: https://doi.org/10.1002/adsu.201700170

Project information

Project financing: Bundesministerium für Wirtschaft und Technologie

Abstract in another language

Abstract A unique method for the postsynthetic functionalization of ordered mesoporous silica materials is described. The functionalization is done via a chemical vapor deposition?type method and leads to the quantitative reaction of isolated surface silanol groups of mesoporous silica materials with organosilane molecules. The result is a highly sulfonated material by anchorage of 3?mercaptopropyltrimethoxysilane molecules and subsequent oxidation of the thiol groups to sulfonic acid groups. Ordered mesoporous KIT?6 and SBA?15 are chosen as model systems. The sulfonated material exhibits a functionalization degree of 1.05 resp. 1.32 molecules nm?2, which is on the maximum of the theoretical achievable functionalization density resulting in high ion exchange capacities of 1.22 and 1.12 mmol g?1. The versatility and mildness of this method opens up functionalization possibilities for a wide range of other materials, which could be sulfonated or otherwise modified with silanes, and tailored for the further application in catalysis or as solid?state proton conductors.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: acidic solids
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Lehrstuhl Physikalische Chemie III > Lehrstuhl Physikalische Chemie III - Univ.-Prof. Dr. Roland Marschall
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 05 Sep 2018 06:17
Last Modified: 30 Oct 2018 07:40
URI: https://eref.uni-bayreuth.de/id/eprint/45710