Structural Studies on New Co Polyamine Complexes by X-Ray Absorption Fine Structure Spectroscopy

Autor:	Jun–ichi Matsuura, Masami Okuda, Toshio Akai, Kaoru Horiuchi, Masaru Yimagawa, Takashi Fujikawa, Yasuo Koike
Rok vydání:	1994
Předmět:	Crystallography Molecular geometry Extended X-ray absorption fine structure Octahedron Chemistry Inorganic chemistry General Engineering General Physics and Astronomy Crystal structure Absorption (chemistry) Spectroscopy XANES X-ray absorption fine structure
Zdroj:	Japanese Journal of Applied Physics. 33:6360
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.33.6360
Popis:	X-ray absorption fine structure (XAFS) studies are performed for a new Co(II) polyamine complex, N,N′-bis(3-aminopropyl)-1,3-propanediamine Co(II) complex (Co-APPD), and related complexes. The observed Co K-edge XANES spectra show that Co-APPD complex reacted with oxygen (Co-APPD( O2)) has a trivalent cobalt atom and has the octahedral structure around Co, whereas the difference in the structure between solid Co-APPD and Co-APPD dimethylsulfoxide (DMSO) solution is small. We also find the distortion from octahedral to tetrahedral structure with the increase of 2-furancarboxylic acid (FRA) concentration in DMSO solution. With the aid of short-range-order multiple scattering calculation, we study the Co K-edge X-ray absorption near edge structure (XANES) spectra of Co-APPD and Co-APPD ( O2) in more detail. From this theoretical study, we obtain information about oxygen bonding angle: the bond angle Co–O–O is about 120°.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9dcfd0efdc53f92bd01f0defcbd722fa https://doi.org/10.1143/jjap.33.6360 Zobrazit plný text záznamu