Xe-129 Nmr-Studies of Hyper-Cross-Linked Polyarylcarbinols - Rigid Versus Flexible Structures

TitleXe-129 Nmr-Studies of Hyper-Cross-Linked Polyarylcarbinols - Rigid Versus Flexible Structures
Publication TypeJournal Article
Year of Publication1995
AuthorsUrban C., Mccord E.F, Webster O.W, Abrams L., Long H.W, Gaede H., Tang P., Pines A
JournalChemistry of Materials
Volume7
Issue7
Pagination1325-1332
Date PublishedJul
ISBN Number0897-4756
Accession NumberWOS:A1995RK99300008
Keywordsadsorption
Abstract

Xenon NMR is used with adsorption measurements to infer information about the microstructure of some novel hyper-cross-linked polyarylcarbinols. It is shown that rigidrod connecting units are necessary for microporosity in these systems, as hyper-cross-linked polymers based on flexible structures are found to have conventional surface areas and xenon NMR spectra. A microporous polymer based on rigid triarylcarbinol monomers shows high xenon uptake and a linear chemical shift variation with pressure at room temperature. Spin-lattice relaxation and cross-polarization dynamics are studied at low temperatures. In this regime the xenon has extremely long equilibration times, and the adsorption dynamics are complicated but give important insight into the polymer topology. The data are compared with two possible models of the polymer microstructwre.

URL<Go to ISI>://WOS:A1995RK99300008
DOI10.1021/Cm00055a008
Short TitleXe-129 Nmr-Studies of Hyper-Cross-Linked Polyarylcarbinols - Rigid Versus Flexible Structures
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