Effect of bilayer phase transitions on vesicle structure and its influence on the kinetics of viologen reduction

Mikael Andersson, Leif Hammarström, Katarina Edwards

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Abstract

Vesicles were prepared from pure phosphatidylcholines (PC), phosphatidic acids (PA), or dioctadecyldimethylamonium bromide (DODAB). The aggregate structure was examined above and below the gel-to-liquid crystalline transition temperature (Tm) by means of cryo-transmission electron microscopy. The redox reaction between a membrane bound viologen and dithionite was studied in the different lipid systems. It was found that the presence of faceted vesicles or open bilayer fragments, below Tm, lead to double-exponential reduction kinetics.

Original languageEnglish
Pages (from-to)14531-14538
Number of pages8
JournalJournal of physical chemistry
Volume99
Issue number39
DOIs
Publication statusPublished - Jan 1 1995

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ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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