Raman Scattering in Zeolites and molecular sieves

Authors

  • Dr. Claude Brémard,

    1. Laboratoire de Spectrochimie Infrarouge et Raman CNRS UPR 2631L, Bât. C5 Université des Sciences et Technologies de Lille F-59655 Villeneuve d'Ascq Cedex (France)
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    • studied chemistry and physics at the University of Lille, receiving his doctorate (Thè d'Etat) in inorganic chemistry in 1971, before joining the Laboratoire de Chimie de Coordination de Strasbourg and then the Institut de Recherche de la Catalyse where he gained experience in organometallic chemistry and catalytic design, particularly the activation of nitrogen oxides. In 1980 he joined the Laboratoire de Spectrochimie Infrarouge et Raman of CNRS at the Université des Sciences et Technologies de Lille in Villeneuve d'Ascq where his research concentrated on polarized Raman scattering in microcrystals of advanced materials. Since 1986, he has been “Directeur de Recherche” of the CNRS. His main current research interest concerns the solid-state inorganic and coordination chemistry and photochemistry of microporous compounds.

  • Dr. Daniel Bougeard

    1. Laboratoire de Spectrochimie Infrarouge et Raman CNRS UPR 2631L, Bât. C5 Université des Sciences et Technologies de Lille F-59655 Villeneuve d'Ascq Cedex (France)
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    • studied chemistry and chemical engineering, graduating as “Ingénieur chimiste” of the “Institut National des Sciences Appliquées” in Lyon in 1969. He was awarded a German Ph.D. from the University of Dortmund in 1972 and a Docteur d'Etat in 1976 from the Université Pierre et Marie Curie in Paris. After research in Dortmund and Paris, he habilitated in the Department of Physical and Theoretical Chemistry of the University of Essen in 1978 before becoming a Professor there in 1984. A brief stay at the University of Reims (1989) was followed by his appointment as “Directeur de recherche” in Lille in 1990. His current research interests concentrate on vibrational spectroscopy including the calculation of spectra, the study of inter-molecular forces and phase transitions in molecular crystals, and the modeling of materials (zeolites, polymers).


  • We are deeply indebted to the Ministere de la Recherche and the Region Nord Pas-de-Calais for grants and financial support. We wish to thank Dr. H. Boulet, Dr. M. Lemaire, Dr. J. M. Manoli, Dr. C. Potvin, Dr. K. Smirnov, D. Dumont and G. Ginestet who have contributed directly to the development of the work described in this article. We acknowledge Dr. J. Barbillat, Dr. G. Buntinx, Dr. J. Laureyns, Dr. A. Lorriaux and Dr. B. Sombret for their assistance and advice while using Raman instruments. Also, we thank Prof. J. L. Guth, Prof. J. B. Nagy, Dr. J. Patarin, C. Hamon (IRMA), G. Descat and S. Tretjak (La grande Paroisse SA), J. F. Mariotti and J. L. Reyrnonet (CECA SA) and Union Carbide for the supply of zeolite and molecular sieves samples.

Abstract

The diffusion and location of guests in zeolite frameworks can be studied in-situ using Raman spectroscopy. For example, the location and orientation of crown ethers (e.g. Na⊕ 18C6, see figure) used as templates in the synthesis of faujasite polymorphs can be studied in the framework they have helped to form, and the subsequent calcination process leading to the final zeolite can also be followed using the technique.

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