Title: Thermoreversible Gels as Magneto‐Optical Switches
Abstract: Angewandte Chemie International EditionVolume 43, Issue 25 p. 3283-3286 Communication Thermoreversible Gels as Magneto-Optical Switches† Olivier Roubeau Dr., Olivier Roubeau Dr. Centre de Recherche Paul Pascal/CNRS-UPR 8641, 115 avenue du Dr. A. Schweitzer, 33600 Pessac, France, Fax: (+33) 5-5684-5600Search for more papers by this authorAnnie Colin Dr., Annie Colin Dr. Rhodia Laboratoire du Futur, CNRS-FRE 2771, Bat B de L'Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac Cedex, FranceSearch for more papers by this authorVéronique Schmitt Dr., Véronique Schmitt Dr. Centre de Recherche Paul Pascal/CNRS-UPR 8641, 115 avenue du Dr. A. Schweitzer, 33600 Pessac, France, Fax: (+33) 5-5684-5600Search for more papers by this authorRodolphe Clérac Dr., Rodolphe Clérac Dr. [email protected] Centre de Recherche Paul Pascal/CNRS-UPR 8641, 115 avenue du Dr. A. Schweitzer, 33600 Pessac, France, Fax: (+33) 5-5684-5600Search for more papers by this author Olivier Roubeau Dr., Olivier Roubeau Dr. Centre de Recherche Paul Pascal/CNRS-UPR 8641, 115 avenue du Dr. A. Schweitzer, 33600 Pessac, France, Fax: (+33) 5-5684-5600Search for more papers by this authorAnnie Colin Dr., Annie Colin Dr. Rhodia Laboratoire du Futur, CNRS-FRE 2771, Bat B de L'Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac Cedex, FranceSearch for more papers by this authorVéronique Schmitt Dr., Véronique Schmitt Dr. Centre de Recherche Paul Pascal/CNRS-UPR 8641, 115 avenue du Dr. A. Schweitzer, 33600 Pessac, France, Fax: (+33) 5-5684-5600Search for more papers by this authorRodolphe Clérac Dr., Rodolphe Clérac Dr. [email protected] Centre de Recherche Paul Pascal/CNRS-UPR 8641, 115 avenue du Dr. A. Schweitzer, 33600 Pessac, France, Fax: (+33) 5-5684-5600Search for more papers by this author First published: 16 June 2004 https://doi.org/10.1002/anie.200454050Citations: 166 † The authors thank Hassan Saadaoui for AFM images, Marie-France Achard and Florent Carn. Financial support from the CNRS, the University Bordeaux 1, and the Région Aquitaine are gratefully acknowledged. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Graphical Abstract Polyfunctional gels: Thermoreversible switchable gels with tunable magnetic, optical, and rheological properties are obtained from a modified spin-crossover polymeric precursor and alkane solvents (see picture). The iron triazole polymer which acts as the gelator, undergoes a spin crossover that is accompanied by a change in the color of the gel. The transfer of spin-crossover properties from solid materials into gels offers a route to new applications. References 1 1aM. N. Leuenberger, D. Loss, Nature 2001, 410, 789; 1bD. Gatteschi, R. Sessoli, Angew. Chem. 2003, 115, 278; Angew. Chem. Int. Ed. 2003, 42, 268; 1cE. Coronado, J. R. Galán-Mascarós, C. Gómez-García, V. Laukhin, Nature 2000, 408, 447. 2 2aB. Vigolo, A. Pénicaud, C. Coulon, C. Sauder, R. Pailler, C. Journet, P. Bernier, P. Poulin, Science 2000, 290, 1331; 2bT. Coradin, J. Larionova, A. A. Smith, G. Rogez, R. Clérac, C. Guérin, G. Blondin, R. E. P. Winpenny, C. Sanchez, T. Mallah, Adv. Mater. 2002, 14, 896; 2cA. Cornia, A. C. Fabretti, M. Pacchioni, L. Zobbi, D. Bonacchi, A. Caneschi, D. Gatteschi, R. Biagi, U. Del Pennino, V. De Renzi, L. Gurevich, H. S. J. Van der Zant, Angew. Chem. 2003, 115, 1683; Angew. Chem. Int. Ed. 2003, 42, 1645; 2dM. Antonietti, G. A. Ozin, Chem. Eur. J. 2004, 10, 28. 3 3aO. Kahn, J. Kröber, C. Jay, Adv. Mater. 1992, 4, 718; 3bR. N. Muller, L. Vander Elst, S. Laurent, J. Am. Chem. Soc. 2003, 125, 8405. 4O. Kahn, C. Jay Martinez, Science 1998, 279, 44. 5K. Sugiyasu, N. Fijita, S. Shinkaï, Angew. Chem. 2004, 116, 1249; Angew. Chem. Int. Ed. 2004, 43, 1229, and references therein. 6K. J. C. van Bommel, C. van der Pol, I. Muizebelt, A. Friggeri, A. Heeres, A. Meetsma, B. L. Feringa, J. van Esch, Angew. Chem. 2004, 116, 1695; Angew. Chem. Int. Ed. 2004, 43, 1663, and references therein. 7F. Armand, C. Badoux, P. Bonville, A. Ruaudel-Texier, O. Kahn, Langmuir 1995, 11, 3467. 8P. Terech, R. G. Weiss, Chem. Rev. 1997, 97, 3133. 9O. Roubeau, J. M. Alcazar Gomez, E. Balksus, J. J. A. Kolnaar, J. G. Haasnoot, J. Reedijk, New J. Chem. 2001, 25, 144. 10 10aA. Michalowicz, J. Moscovici, O. Kahn, J. Phys. IV 1997, C2, 633; 10bM. Verelst, L. Sommier, P. Lecante, A. Mosset, O. Kahn, Chem. Mater. 1998, 10, 980. 11 11aP. Gütlich, A. Hauser, H. Spiering, Angew. Chem. 1994, 106, 2109; Angew. Chem. Int. Ed. Engl. 1994, 33, 2024; 11bO. Roubeau, J. G. Haasnoot, E. Codjovi, F. Varret, J. Reedijk, Chem. Mater. 2002, 14, 2559. 12Note that the pure ligand 4-octadecyl-1,2,4-triazole does not gelify alkane solvents, while gels are also obtained starting from SC solids having other lengths of alkyl substituents (C13 and C16) on the triazole rings. 13F. Placin, J.-P. Desvergne, J.-C. Lassègues, Chem. Mater. 2001, 13, 117, and references therein. 14M. Lescanne, A. Colin, O. Mondain-Monval, F. Fagès, J.-L. Pozzo, Langmuir 2003, 19, 2013. 15When the triazole ligand is in a local C2v symmetry (case of a 1,2-bridging coordination mode), the intensity of ring torsion vibration modes is weak compared to their intensities in a non-C2v case, as for example, in the pure 1H-1,2,4-triazole. In our case in the gel spectra, these vibration bands at approximately 670 cm−1 are very weak confirming the local C2v symmetry. 165 wt % of [FeII(C18trz)3](X)2⋅2 H2O in decane forms upon warming purple and colorless gels in which X−=Cl− or [BF4]−. Their TSC values are above and below room temperature, approximately 80 °C and −20 °C, respectively. Citing Literature Supporting Information Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2004/z54050_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article. Volume43, Issue25June 21, 2004Pages 3283-3286 ReferencesRelatedInformation
Publication Year: 2004
Publication Date: 2004-06-16
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
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Cited By Count: 178
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