Confirmation of the strongest nitriles–hydroxy groups interaction in the side pockets of mordenite zeolites

Literature Information

Publication Date 2000-10-31
DOI 10.1039/B005901N
Impact Factor 3.676
Authors

Olivier Marie, Frédéric Thibault-Starzyk, Jean-Claude Lavalley


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Abstract

The adsorption/desorption of various nitriles on mordenite type zeolites has been studied by FTIR spectroscopy. The two different hydroxy groups present in mordenite give rise to distinct interactions with nitriles as probe molecules. As soon as the adsorbed nitrile is small enough to penetrate the side pockets and react with acid hydroxy groups located inside, a very strong interaction appears leading to a typical high frequency stretching vibration ν(CN)HF. The present paper indicates that there is no proton transfer from the zeolite to the nitrile at room temperature. Such a high ν(CN) frequency is not due to a protonated form of nitrile but to a very strong hydrogen bonding. A stronger interaction of nitriles with hydroxy groups located inside the side pockets than with those located in the main channels could be due to both confinement and solvent effects.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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