Premium
Rotational Entropy Driven Separation of Alkane/Isoalkane Mixtures in Zeolite Cages
Author(s) -
Denayer Joeri F. M.,
Ocakoglu Refik A.,
Arik Ilbige C.,
Kirschhock Christine E. A.,
Martens Johan A.,
Baron Gino V.
Publication year - 2005
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.200454058
Subject(s) - zeolite , radius of gyration , alkane , molecule , adsorption , entropy (arrow of time) , chemistry , chemical physics , thermodynamics , computational chemistry , materials science , crystallography , organic chemistry , hydrocarbon , polymer , physics , catalysis
Yanking chains and rattling cages : Depending on their radius of gyration, molecules either retain or lose their ability to rotate inside zeolite cages (see picture). Such differences in rotational adsorption entropy result in a preferential uptake of branched alkanes over their linear structural isomers in zeolites such as MCM‐22 which allows the separation of the two types of molecules.