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The pyridine derivatives were combined to poly(styrene) beads with spacer groups or a graft chain. These spacer‐type and graft‐type pyridine beads formed their Cu complexes with high rates and large stability constants; they act as an effective chelating resin. The pyridine residues were more mobile due to the spacer group and the graft chain, compared with the poly(4‐vinylpyridine) powder.
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Nishide et al. (1982) studied this question.
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