Association of nucleobase-containing ammonium ionenes

Mana Tamami, Keren Zhang, Ninad Dixit, Robert B. Moore, Timothy Edward Long*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Adenine- and thymine-functionalized ammonium ionenes with variation in spacer lengths are successfully synthesized using the Michael addition post-polymerization functionalization. This report describes the influence of pendant spacer length on homo-association and heteroassociation of complementary nucleobase-containing ionenes. The ionene homopolymers and complementary blends with various spacer lengths show a single glass transition temperature. Higher glass transition temperatures are observed for the shorter-spacer ionene homopolymers and their blends. The hydrogen bonding interactions in both blends of adenine-containing ionenes (ionene-A) and thymine-containing ionenes (ionene-T) with both spacer lengths are studied using differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR) spectroscopy, and atomic force microscopy (AFM). DSC analyses do not reveal hydrogen bonding interactions in the ionene blends with the shorter spacer length. In contrast, the longer spacer length ionene blends show the presence of hydrogen bonding interactions and demonstrate that homoassociation is stronger than heteroassociation. FTIR spectroscopy and AFM confirm hydrogen bonding interactions for the longer spacer ionene blends.

Original languageEnglish
Pages (from-to)2337-2344
Number of pages8
JournalMacromolecular Chemistry and Physics
Issue number23
Publication statusPublished - 2014 Dec 1
Externally publishedYes


  • Hydrogen bonding
  • Miscibility
  • Non-segmented ionenes
  • Nucleobases
  • Spacer lengths

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry


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