An EPR study on oxygen molecule adduct of Co(II)-phthalocyanines encapsulated into zeolites

Autor:	Hidenori Yahiro, Tetsuji Kuramoto, Keiji Kurohagi, Takafumi Naka, Genji Okada, Masaru Shiotani
Rok vydání:	2005
Předmět:	Butylamine Ligand Chemistry Inorganic chemistry General Chemistry Condensed Matter Physics Molecular sieve law.invention Adduct Crystallography Paramagnetism Mechanics of Materials law Molecule General Materials Science Electron paramagnetic resonance Zeolite
Zdroj:	Microporous and Mesoporous Materials. 79:291-297
ISSN:	1387-1811
DOI:	10.1016/j.micromeso.2004.11.017
Popis:	An electron paramagnetic resonance (EPR) study was carried out for O 2 molecule adducts formed on cobalt-phthalocyanine encapsulated into Y-type zeolite (CoPc-in-Y). The EPR spectrum, which is characteristic of a superoxide-type O 2 -adduct to CoPc-in-Y, was observed when O 2 molecule was introduced into CoPc-in-Y with either ammonia (NH 3 ) or n -butylamine ( n -BuNH 2 ) as an axial ligand. The number of the O 2 -adduct was found to strongly depend on measurement temperature as well as on the axial ligand employed. The maximum spin concentration of (O 2 –Co) 2+ Pc( n -BuNH 2 )-in-Y was about one order of magnitude higher than that of (O 2 –Co) 2+ Pc(NH 3 )-in-Y. The results are discussed in terms of the size of the axial ligands and of the magnetic interaction of the O 2 -adduct with paramagnetic O 2 adsorbed on zeolite.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::03ccedbcd5d78e8401f64a4de39a24b0 https://doi.org/10.1016/j.micromeso.2004.11.017 Zobrazit plný text záznamu Full Text from ScienceDirect