Order and disorder in low dimensional materials: Beyond the first coordination sphere with EXAFS.

Autor: Mandelkow, Eckhard, Dewar, Michael J. S., Dunitz, Jack D., Hafner, Klaus, Heilbronner, Edgar, Itô, Shô, Lehn, Jean-Marie, Niedenzu, Kurt, Raymond, Kenneth N., Rees, Charles W., Vögtle, Fritz, Bazin, D., Benfatto, M., Bianconi, A., Clement, R., Dexpert, H., Galy, J., Garcia, J., Lagarde, P., Laggner, P.
Zdroj: Synchrotron Radiation in Chemistry & Biology I; 1988, p107-149, 43p
Abstrakt: The strengths and weaknesses of EXAFS in determining the radial distribution of the first nearest neighbours in coordination compounds are well known. We point out here how local information given by EXAFS upon the first coordination sphere can be used to characterize short or long range order or disorder in low dimensional materials. Low temperature measurements, use of several absorbing species in the same compound, comparison between seemingly contradictory X-Ray diffraction and EXAFS data allow to solve three dimensional structural problems related to physical properties. The materials studied are insulating uni- or bimetallic magnetic chains and pure or intercalated MPS3 layers. [ABSTRACT FROM AUTHOR]
Databáze: Supplemental Index