Amylose-iodine complex formation without KI: Evidence for absence of iodide ions within the complex

Vincent T. Calabrese, Arshad Khan

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Amylose-iodine (AI) complex has been synthesized in aqueous solution without added KI. Complex formation (with solid iodine in amylose solution) is maximized at approximately 35 °C and decreases beyond that temperature. Ion-selective electrode (ISE) measurements of an aqueous solution of iodine and AI complex indicate that there is no change in the I- ion concentration when the complex forms. This suggests that I- ions (including I3-, I5-, and others) cannot be involved in forming the AI complex. The present work also reports a new and simple method for providing both the iodine-binding capacity (IBC) of amylose and the dissociation mechanism for the AI complex.

Original languageEnglish (US)
Pages (from-to)2711-2717
Number of pages7
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume37
Issue number15
DOIs
StatePublished - Aug 1 1999

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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