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Modified aliphatic ionenes. Influence of charge density and length of the chains on complex formation with poly(methacrylic acid)статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Zelikin A.N., Akritskaya N.I., Izumrudov V.A.
- Журнал: Macromolecular Chemistry and Physics
- Том: 202
- Номер: 15
- Год издания: 2001
- Издательство: John Wiley & Sons Ltd.
- Местоположение издательства: United Kingdom
- Первая страница: 3018
- Последняя страница: 3026
- DOI: 10.1002/1521-3935(20011001)202:15<3018::AID-MACP3018>3.0.CO;2-7
- Аннотация: Modified ionenes were obtained by alkylation of terminal amino groups of aliphatic ionenes with pnitrotoluene bromide. The modification endowed the ionenes with relatively high absorbance in UV-range of spectrum. The advantages of the modified ionenes were demonstrated, i.e. the possibility of highly accurate determination of the ionene concentration in dilute aqueous solutions from UV-spectra, fractionation of the sample by ion-exchange chromatography in NaCl gradient with UVdetection, estimation of a polymerization degree of the obtained fractions by "end groups" method and studying of polyelectrolyte complex formation with pyrenyl-tagged poly(methacrylic acid) by fluorescence quenching technique. Chain length and charge density of the ionene were shown to be the factors factor% controlling both solubility and dissociation of the polyelectrolyte complexes in water-salt media. The data obtained strongly suggest that the main regularities ascertained for polyelectrolyte complexes are applicable to the ionene-containing systems, even though the ionene samples contained at most 32 charges in the chains. The revealed possibility of preparing ionene-containing PEC of desired stability, which can be varied in a wide range of ionic strength, including physiological one demonstrates potential of the modified ionenes as components of self-assembly and self-adjustment systems attractive for biomedical applications.
- Добавил в систему: Изумрудов Владимир Алексеевич