Premium
Crystallographic Observation of Dynamic Gas Adsorption Sites and Thermal Expansion in a Breathable Fluorous Metal–Organic Framework
Author(s) -
Yang Chi,
Wang Xiaoping,
Omary Mohammad A.
Publication year - 2009
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/anie.200804739
Subject(s) - microporous material , adsorption , thermal expansion , metal organic framework , thermal , molecule , atmosphere (unit) , crystal (programming language) , materials science , metal , chemical engineering , chemistry , organic chemistry , composite material , thermodynamics , physics , computer science , engineering , programming language
Playing accordion : Cooling a single crystal of a microporous fluorous metal–organic framework under ambient atmosphere leads to very large breathing upon gas adsorption, during which multiple N 2 molecules are filled into channels and cages (see picture). While the framework exhibits remarkable positive thermal expansion under vacuum, a gigantic apparent negative thermal expansion takes place when the crystal is exposed to N 2 at ambient pressure.