Issue 12, 2010
From the journal:

Green Chemistry

A clean and effective supercritical carbon dioxide method for the host–guest synthesis and encapsulation of photoactive molecules in nanoporous matrices†

Nerea Murillo-Cremaes,a   Ana M. López-Periago,a   Javier Saurina,b   Anna Roig*a  and  Concepción Domingo*a  

* Corresponding authors

a Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, Spain
E-mail: roig@icmab.es, conchi@icmab.es
Fax: +34 935805729
Tel: +34 935801853

b Department of Analytical Chemistry. University of Barcelona, Martí I Franquès 1–11, Barcelona, Spain
E-mail: xavi.saurina@ub.edu
Fax: +34 934021233
Tel: +34 934039778

Abstract

The present work is concerned with host–guest processes in the micro- and mesoporous restricted spaces provided by silica aerogels and aluminosilicates. A supercritical carbon dioxide ship-in-a-bottle approach was used for the synthesis of photoactive molecules (triphenylpyrylium and dimethoxyltrityl cations) inside these nanoporous matrices. The resulting hybrid nanocomposites can act as stable and recoverable heterogeneous photocatalysts, having obvious advantages with respect to the more easily degraded organic cations frequently used in homogeneous catalysis. Two aspects of green chemistry are combined in this study to produce nanoporous materials loaded with cationic photosensitizers: (i) the use of supercritical carbon dioxide as a reaction medium in one-pot and as a zero waste technology, and (ii) the use of transparent high surface area nanoporous supports that are expected to be more effective for the target photoactive applications than traditional opaque microporous matrices.

Graphical abstract: A clean and effective supercritical carbon dioxide method for the host–guest synthesis and encapsulation of photoactive molecules in nanoporous matrices

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Article information

DOI
https://doi.org/10.1039/C004762G
Article type
Paper
Submitted
30 Mar 2010
Accepted
28 Sep 2010
First published
18 Oct 2010

Green Chem., 2010,12, 2196-2204

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A clean and effective supercritical carbon dioxide method for the host–guest synthesis and encapsulation of photoactive molecules in nanoporous matrices

N. Murillo-Cremaes, A. M. López-Periago, J. Saurina, A. Roig and C. Domingo, Green Chem., 2010, 12, 2196 DOI: 10.1039/C004762G

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