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Shaping Solid‐State Supramolecular Cavities: Chemically Induced Accordionlike Movement of γ ‐Zirconium Phosphate Containing Polyethylenoxide Pillars
Author(s) -
Alberti Giulio,
Brunet Ernesto,
Dionigi Chiara,
Juanes Olga,
de la Mata María José,
RodríguezUbis Juan Carlos,
Vivani Riccardo
Publication year - 1999
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19991115)38:22<3351::aid-anie3351>3.0.co;2-v
Subject(s) - zirconium , hydrogen bond , zirconium phosphate , perpendicular , supramolecular chemistry , solid state , crystallography , materials science , oxygen , hydrogen , phosphate , chemistry , polymer chemistry , molecule , inorganic chemistry , crystal structure , organic chemistry , geometry , mathematics
The hydrophilic oxygen atoms of polyethylenoxide chains inserted as pillars in γ ‐zirconium phosphate form hydrogen bonds with the acid groups of the host. As a result the pillars are almost perpendicular to the γ layers. Upon changing the pH level of the supernatant solution the hydrogen bonds are broken and the pillars become almost perpendicular to the layers (shown schematically). Thus there is a reversible enlargement–shortening of the interlayer space.