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Structural Analyses of Intergrowth and Stacking Fault in Cage-Type Mesoporous Crystals
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi.ORCID-id: 0000-0001-5803-0817
2009 (engelsk)Inngår i: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 21, nr 2, s. 223-229Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
2009. Vol. 21, nr 2, s. 223-229
Identifikatorer
URN: urn:nbn:se:su:diva-36789DOI: 10.1021/cm802162rISI: 000262605200008OAI: oai:DiVA.org:su-36789DiVA, id: diva2:290235
Tilgjengelig fra: 2010-01-26 Laget: 2010-01-26 Sist oppdatert: 2020-03-05bibliografisk kontrollert
Inngår i avhandling
1. Synthesis and Characterization of Functionalized Silica Mesoporous Crystals: Cationic Surfactant and Co-structure Directing Agent System
Åpne denne publikasjonen i ny fane eller vindu >>Synthesis and Characterization of Functionalized Silica Mesoporous Crystals: Cationic Surfactant and Co-structure Directing Agent System
2010 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This dissertation has been focused on the synthesis and characterization of novel functionalized silica mesoporous crystals by using cationic surfactant and co–structure directing agents (CSDA), the central concept of the synthesis method is to build proper organic/inorganic interactions by introducing CSDA into the synthesis system.

By using cationic surfactant as template and anionic CSDA, carboxylic group functionalized mesoporous silicas were successfully synthesized. Well ordered 2D p6mm, cubic Fm-3m, mixture of CCP (Fm-3m) and HCP (P63/mmc), and cubic Fd-3m with uniform carboxylic group distribution have been obtained. Besides, we have investigated the Fm-3m/Fd-3m type intergrowth and new type defects observed in the Fd-3m structure using transmission electron microscopy (TEM) and proposed a “polyhedron packing” model.

New amphoteric, inorganic amino acid with highly ordered mesopores were synthesized. Uniform distribution of acid and base organic groups on the mesopore surfaces were formed by interactions between the counter charged surfactant head groups and ionic parts of CSDAs. It has been demonstrated that organic (–NH2 and –COOH) pairs incorporated in the mesopore walls behave as natural amino acids, collectively exhibiting an isoelectric point of ~6.0. Moreover, we have demonstrated that the inorganic amino acid is an efficient catalyst for the reaction between aldehydes and carbon nucleophiles.

sted, utgiver, år, opplag, sider
Stockholm: Department of Materials and Environmental Chemistry (MMK), Stockholm University, 2010. s. 82
Emneord
Mesoporous silica, Template synthesis, Functionalization, Electron microscopy, Defects, Crystal growth, Catalysis
HSV kategori
Forskningsprogram
strukturkemi
Identifikatorer
urn:nbn:se:su:diva-38398 (URN)978-91-7447-029-1 (ISBN)
Disputas
2010-05-18, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 16 B, Stockholm, 13:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2010-04-26 Laget: 2010-04-13 Sist oppdatert: 2010-04-14bibliografisk kontrollert

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