Title: Intrazeolitic reaction between transition-metal ions and open or closed polyamine ligands
Authors: De Vos, Dirk ×
Vanoppen, Dl
Li, Xy
Libbrecht, S
Bruynseraede, Yvan
Knops-Gerrits, Pp
Jacobs, Pierre #
Issue Date: May-1995
Publisher: Vch publishers inc
Series Title: Chemistry - a European Journal vol:1 issue:2 pages:144-149
Abstract: Intrazeolitic transition metals, such as Ni2+ and Co2+, were chelated by open or closed, tetra- or pentadentate polyamine ligands. Their coordination and redox chemistry was studied by IR-Raman, EPR, diffuse reflectance. and magnetic techniques. For pseudo-octahedral complexes with tetradentate ligands, the presence of the zeolite favors cis coordination over the trans form. This is explained by the very low tendency of the zeolite surface to bind as a monodentate ligand to a planar metal complex. However, if trans complexes are formed (as with Ni2+), the axial positions on the complex are available for ligand exchange. Such intracrystalline complex syntheses result in the formation of new redox solids. For example, [Co-II(cyclam)](2+)-NaY (cyclam = 1,4,8,11-tetraazacyclotetradecane) is a reversible, high-affinity (p(1/2) <1 mbar) and high-capacity (> 90 mu mol g(-1)) dioxygen-sorbing material.
ISSN: 0947-6539
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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