EXAFS determination of the structure of silver stearate, [Ag(O2C(CH2)16CH3]2, and the effect of temperature on the silver coordination sphere

Autor:	S.G. Nikitenko, D.R. Whitcomb, S.V. Chernov, B.P. Tolochko
Rok vydání:	1998
Předmět:	Physics Nuclear and High Energy Physics Coordination sphere Extended X-ray absorption fine structure Dimer Bond length Metal chemistry.chemical_compound Crystallography chemistry Stearate visual_art visual_art.visual_art_medium Molecule Carboxylate Instrumentation
Zdroj:	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 405:428-434
ISSN:	0168-9002
DOI:	10.1016/s0168-9002(97)01044-9
Popis:	The structure of silver stearate, [Ag(O 2 C(CH 2 ) 16 CH 3 ] 2 , has been refined using Ag K-EXAFS spectroscopy and known unit cell parameters. The silver carboxylate complex is similar to known short chain silver carboxylate derivatives and is a dimer formed from an eight-membered ring comprised of two silver atoms bridged by two carboxylates from the stearate molecules. The Ag ··· Ag distance is 2.90 (0.03) A, similar to the bond distance in metallic silver. The dimers are further bonded to each other by long 2.60 A, AgO bonds. Moderate increases in temperature does not affect the structure, however, upon exposure to higher temperatures a new structure results which exhibits a Ag ··· Ag distance of 4.2 A.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7edf48779209295db6bc621675c9d6f9 https://doi.org/10.1016/s0168-9002(97)01044-9 Zobrazit plný text záznamu Full Text from ScienceDirect