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Near Edge X‐Ray Absorption Fine Structure (NEXAFS) Studies of Copper Ion‐Containing PAMAMOS Dendrimer Networks
Author(s) -
Bubeck Robert A.,
Dvornic Petar R.,
Hu Jin,
Hexemer Alexander,
Li Xuefa,
Keinath Steven E.,
Fischer Daniel A.
Publication year - 2005
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200400341
Subject(s) - xanes , dendrimer , copper , chemistry , crystallography , absorption (acoustics) , extended x ray absorption fine structure , ion , absorption spectroscopy , x ray absorption fine structure , analytical chemistry (journal) , inorganic chemistry , materials science , polymer chemistry , spectroscopy , organic chemistry , optics , physics , quantum mechanics , composite material
Summary: The interaction of Cu 2+ with C, N and O moieties in nanocomposites containing copper ions complexed in poly(amidoamine‐organosilicon), PAMAMOS, dendrimer networks was characterized using near edge X‐ray absorption fine structure (NEXAFS). The effects on the 1s → π * and 1s → σ * orbital transitions were determined at the C, N and O K edges. The influence of Cu 2+ on the transitions of 1s → π *(NH) at 401 eV, and 1s → σ *(NC) type transitions at 412 eV within the N edge increased with increasing Cu 2+ content up to the theoretical limit of the copper‐accommodating capacity of the PAMAMOS dendrimer used. As ligands, the carbonyls were found to saturate at much lower Cu 2+ concentrations compared with those associated with N.NEXAFS spectrum of a PAMAMOS[4,1]DMOMS dendrimer network.
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