Size-selective shell cross-linked interior functionalized siloxane nanocages

Young Woong Suh, Mayfair C. Kung, Yingmin Wang, Harold H Kung

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A new structure, consisting of a shell cross-linked, 2 nm size siloxane nanocage containing propylamine groups tethered to the interior face of the shell was synthesized, starting with micelles of the surfactant molecule, (triethoxysilyl)propylcetylcarbamate. After hydrolysis of the ethoxysilyl groups and condensation and capping of the silanols to form a cross-linked, one-atom-layer-thick siloxane shell, the carbamate was converted to amine, releasing the cetyl group from the structure and resulting in the desired spherical nanocage. The intermediates in the synthesis process and the final structure were characterized by 1H and 29Si NMR, DLS, TEM, and mass spectroscopy. The amine groups tethered to the interior surface of the shell react readily with ninhydrin but do not interact with the larger ZnTPP, indicating molecular size selectivity by the cross-linked shell. The structure also exhibits confinement effect in the amine-catalyzed decarboxylation of acetoacetic acid, exhibiting higher activity and higher selectivity for acetal than (aminopropyl)triethoxysilane.

Original languageEnglish
Pages (from-to)2776-2777
Number of pages2
JournalJournal of the American Chemical Society
Volume128
Issue number9
DOIs
Publication statusPublished - Mar 8 2006

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Siloxanes
Amines
Propylamines
Ninhydrin
Acetals
Decarboxylation
Carbamates
Micelles
Surface-Active Agents
Condensation
Hydrolysis
Mass Spectrometry
Surface active agents
Nuclear magnetic resonance
Spectroscopy
Transmission electron microscopy
Atoms
Molecules
Acids

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Size-selective shell cross-linked interior functionalized siloxane nanocages. / Suh, Young Woong; Kung, Mayfair C.; Wang, Yingmin; Kung, Harold H.

In: Journal of the American Chemical Society, Vol. 128, No. 9, 08.03.2006, p. 2776-2777.

Research output: Contribution to journalArticle

Suh, Young Woong ; Kung, Mayfair C. ; Wang, Yingmin ; Kung, Harold H. / Size-selective shell cross-linked interior functionalized siloxane nanocages. In: Journal of the American Chemical Society. 2006 ; Vol. 128, No. 9. pp. 2776-2777.
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