On. Petzold et Ii. Harruna, High-performance directional metallopolyamides. II. Optical spectroscopic studies of metal chelation, J INORG ORG, 10(4), 2000, pp. 249-264
The chelating interaction between metal ions and 4.4'-disubstituted2.2'- bi
pyridyl-containing high-performance polymeric ligands prepared from 2.2'-bi
pyridyl-4.4'-dicarboxylic acid and a series of primary aromatic diamines wa
s investigated by optical spectroscopy. Optical spectroscopic studies of th
e chelation of ruthenium ions by the 2,2'-bipyridyl-containing polyamides r
evealed the formation of distinct ruthenium(ll) complexes [Ru-II(poly.)L-4]
( lambda (max) = 530 nm). [ Ru-II(poly), L-2] ( lambda (max) = 584 nm), an
d [ Ru-II(poly)(3)](2+) ( lambda (max) = 476 nm) while iron(II) ions formed
only one complex (lambda (max) = 569 nm). The diverse functional Features
of the polymer repeat unit directly influences the chelation of metal ions.