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Effect of cyclodextrins on pH-induced conformational transition of poly(methacrylic acid)
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SYSNO ASEP 0364990 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Effect of cyclodextrins on pH-induced conformational transition of poly(methacrylic acid) Tvůrce(i) Horský, Jiří (UMCH-V) RID, ORCID
Podešva, Jiří (UMCH-V) RID
Walterová, Zuzana (UMCH-V)Zdroj.dok. Chemical Papers. - : Springer - ISSN 0366-6352
Roč. 65, č. 6 (2011), s. 847-854Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. SK - Slovensko Klíč. slova cyclodextrins ; inclusion complexes ; polyelectrolytes Vědní obor RIV BO - Biofyzika CEP GA202/09/2078 GA ČR - Grantová agentura ČR CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000297373700014 DOI 10.2478/s11696-011-0080-8 Anotace A pH-induced conformational transition (CT) of atactic poly(methacrylic acid) (PMMA) from the contracted to expanded conformation was investigated by viscometry, potentiometric titration, and anthracene solubilisation in the presence of - glucose, α-cyclodextrin (αCD), and γ-cyclodextrin (γCD), respectively. No effect of glucose and αCD on CT was observed. On the other hand, the CT characteristic features were absent in the presence of γCD. The different effects of the co-solutes indicate that the interaction between PMAA and γCD corresponds to the partial inclusion of the PMAA chain into the γCD cavity. The viscometry and anthracene solubilisation imply that γCD promotes the expanded conformation of PMAA at low pH. The potentiometric behaviour corresponds to that of the contracted PMMA conformation. Thus the results suggest the hierarchical picture of the PMAA conformation at low pH in which the local arrangement of the PMAA chain is a prerequisite for clustering on a larger scale. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2012
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