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Inside Cover: Natural Abundance 17 O DNP NMR Provides Precise O−H Distances and Insights into the Brønsted Acidity of Heterogeneous Catalysts (Angew. Chem. Int. Ed. 31/2017)
Author(s) -
Perras Frédéric A.,
Wang Zhuoran,
Naik Pranjali,
Slowing Igor I.,
Pruski Marek
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201704989
Subject(s) - catalysis , chemistry , intermolecular force , cover (algebra) , brønsted–lowry acid–base theory , hydrogen bond , analytical chemistry (journal) , molecule , organic chemistry , mechanical engineering , engineering
Brønsted acidic sites on catalyst surfaces are observed by 17 O dynamic nuclear‐polarization‐enhanced NMR spectroscopy, which hyperpolarizes nuclei by microwave‐induced saturation of electrons. In their Communication on page 9165 ff., M. Pruski et al. report the measurement of O−H distances with sub‐picometer precision. The length of the O−H bond is directly related to the Brønsted acidity of the sites and is also a reporter of the formation of intermolecular hydrogen‐bonding interactions.