Ion-based materials derived from positively and negatively charged chloride complexes of π-conjugated molecules

J Am Chem Soc. 2013 Oct 2;135(39):14797-805. doi: 10.1021/ja4071333. Epub 2013 Sep 20.

Abstract

Oriented salts from planar charged species were prepared by combining positively and negatively charged receptor-anion complexes with similar geometries using dicationic and electronically neutral π-conjugated receptors. Phenylene- or pyrimidine-bridged bis(imidazolium) dicationic anion receptors formed monocationic receptor-Cl(-) complexes that were accompanied by a free Cl(-). This free Cl(-) was subsequently captured by pyrrole-based neutral anion receptors to form negatively charged receptor-Cl(-) complexes. The ion pair of the resulting positively and negatively charged planar receptor-Cl(-) complexes could produce a supramolecular octane gel, adopting a lamellar self-organized structure in its xerogel state. On the other hand, the solid-state ion pairs had hexagonal columnar mesophases, which formed via alternate stacking of the positively and negatively charged planar receptor-Cl(-) complexes. By use of the flash-photolysis time-resolved microwave conductivity technique, the one-dimensional charge-carrier transporting property, with a mobility of 0.05 cm(2) V(-1) s(-1), was determined for the newly prepared solid-state ion pairs.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chlorides / chemistry*
  • Gels / chemistry*
  • Imidazoles / chemistry
  • Ions / chemistry*
  • Models, Molecular
  • Pyrimidines / chemistry
  • Pyrroles / chemistry

Substances

  • Chlorides
  • Gels
  • Imidazoles
  • Ions
  • Pyrimidines
  • Pyrroles
  • imidazole