Autor(en): | Saha, Subhadeep Chen, Yen-Ting Ganta, Sudhakar Gilles, Markus Holzapfel, Björn Lill, Pascal Rehage, Heinz Gatsogiannis, Christos Clever, Guido H. |
Titel: | Coordination cage-based emulsifiers: templated formation of metal oxide microcapsules monitored by in situ LC-TEM |
Sprache (ISO): | en |
Zusammenfassung: | Metallo-supramolecular self-assembly has yielded a plethora of discrete nanosystems, many of which show competence in capturing guests and catalyzing chemical reactions. However, the potential of low-molecular bottom-up self-assemblies in the development of structured inorganic materials has rarely been methodically explored so far. Herein, we present a new type of metallo-supramolecular surfactant with the ability to stabilize non-aqueous emulsions for a significant period. The molecular design of the surfactant is based on a heteroleptic coordination cage (CGA-3; CGA=Cage-based Gemini Amphiphile), assembled from two pairs of organic building blocks, grouped around two Pd(II) cations. Shape-complementarity between the differently functionalized components generates discrete amphiphiles with a tailor-made polarity profile, able to stabilize non-aqueous emulsions, such as hexadecane-in-DMSO. These emulsions were used as a medium for the synthesis of spherical metal oxide microcapsules (titanium oxide, zirconium oxide, and niobium oxide) from soluble, water-sensitive alkoxide precursors by allowing a controlled dosage of water to the liquid-liquid phase boundary. Synthesized materials were analyzed by a combination of electron microscopic techniques. In situ liquid cell transmission electron microscopy (LC-TEM) was utilized for the first time to visualize the dynamics of the emulsion-templated formation of hollow inorganic titanium oxide and zirconium oxide microspheres. |
Schlagwörter: | Coordination cages Emulsions Metal oxides Self-assembly Transmission electron microscopy |
URI: | http://hdl.handle.net/2003/40763 http://dx.doi.org/10.17877/DE290R-22620 |
Erscheinungsdatum: | 2021-11-26 |
Rechte (Link): | https://creativecommons.org/licenses/by/4.0/ |
Enthalten in den Sammlungen: | Lehrstühle für Anorganische Chemie |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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Chemistry A European J - 2021 - Saha - Coordination Cage‐Based Emulsifiers Templated Formation of Metal Oxide.pdf | DNB | 2.32 MB | Adobe PDF | Öffnen/Anzeigen |
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