Association of nucleobase-containing ammonium ionenes

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

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


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 (US)
Pages (from-to)2337-2344
Number of pages8
JournalMacromolecular Chemistry and Physics
Issue number23
StatePublished - Dec 1 2014
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


Dive into the research topics of 'Association of nucleobase-containing ammonium ionenes'. Together they form a unique fingerprint.

Cite this