Massive Pressure Amplification by Stimulated Contraction of Mesoporous Frameworks. Issue 21 (3rd May 2021)

• Record Type: Journal Article
• Authors: Bon, Volodymyr; Krause, Simon; Senkovska, Irena; Grimm, Nico; Wallacher, Dirk; Többens, Daniel M.; Kaskel, Stefan
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 21(2021)
• Page Start: 11735
• Page End: 11739
• Publication Date: 2021-05-03
• Subjects: DUT-49 -- metal–organic frameworks -- negative gas adsorption -- pneumatics -- pressure amplification; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202100549
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Herein we demonstrate mesoporous frameworks interacting with carbon dioxide leading to stimulated structural contractions and massive out‐of‐equilibrium pressure amplification well beyond ambient pressure. Carbon dioxide, a non‐toxic and non‐flammable working medium, is promising for the development of pressure‐amplifying frameworks for pneumatic technologies and safety systems. The strong interaction of the fluid with the framework even contracts DUT‐46, a framework hitherto considered as non‐flexible. Synchrotron‐based in situ PXRD/adsorption experiments reveal the characteristic contraction pressure for DUT‐49 pressure amplification in the range of 350–680 kPa. The stimulated framework contraction expels 1.1 to 2.4 mmol g −1 CO2 leading to autonomous pressure amplification in a pneumatic demonstrator system up to 428 kPa. According to system level estimations even higher theoretical pressure amplification may be achieved between 535 and 1011 kPa. Abstract : Negative Gas Adsorption is a unique counterintuitive phenomenon of responsive metal–organic frameworks hitherto only observed below atmospheric pressure. Carbon dioxide stimulates contraction at high absolute pressure inducing massive pressure amplification exceeding 500 kPa.