Description:
<jats:title>Abstract</jats:title><jats:p><jats:bold>Summary:</jats:bold> The affinity of polybetaines of pyridiniocarboxylate structure that differed by the number <jats:italic>n</jats:italic> of methylene groups in the betaine moieties (<jats:italic>n</jats:italic> = 1, 2, 4, and 5) to the tagged poly(methacrylic acid) or DNA was estimated by fluorescence quenching techniques. The revealed irregular change of the affinity with increase in <jats:italic>n</jats:italic> and the pronounced pH‐induced stabilization of the complexes in neutral media may be particularly beneficial in the development of (bio)separation techniques.</jats:p><jats:p><jats:boxed-text content-type="graphic" position="anchor"><jats:caption><jats:p>pH‐Dependence of stability of PCB‐<jats:italic>n</jats:italic> complexes with poly(methacrylic acid) in water‐salt solutions presented in relative units.</jats:p></jats:caption><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/gif" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/mgra001.gif"><jats:alt-text>magnified image</jats:alt-text><jats:caption><jats:p>pH‐Dependence of stability of PCB‐<jats:italic>n</jats:italic> complexes with poly(methacrylic acid) in water‐salt solutions presented in relative units.</jats:p></jats:caption></jats:graphic></jats:boxed-text>
</jats:p>