Jump to main content
Jump to site search


Rapid Self-Healing and Anion Selectivity in Metallosupramolecular Gels Assisted by Fluorine-Fluorine Interactions

Abstract

Simple ML2 [M= Fe(II), Co(II), Ni(II)] complexes obtained from a perfluoroalkylamide derivative of 4-aminophenyl-2,2´,6,2´-terpyridine spontaneously, yet anion selectively, self-assemble into gels, which manifest an unpresetended rapid gel strength recovery, viz. self-healing, and thermal rearrangement in aqueous dimethyl sulfoxide. The key factor for the gelation and the rheological properties emerge from the fluorine - fluorine interactions between the perfluorinated chains, as the corresponding hydrocarbon derivative did not from metallogels. The perfluoro-terpyridine ligand alone formed single crystals, while its Fe(II), Co(II) or Ni(II) complexes underwent rapid gelation leading to highly entangled fibrillar networks visualized by electron microscopy. The thermodynamic parameters of gelation based on varibale temperature NMR on 1H and 19F resonances showed that gelation was enthalpically favourable and entropically disfavourable The step strain rheological experiments revealed that the gels undergo rapid self-healing and the morphological features, thermal stability and mechanical properties were found to depend on the nature of the metal ion.

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 18 Mar 2017, accepted on 08 May 2017 and first published on 08 May 2017


Article type: Paper
DOI: 10.1039/C7DT00983F
Citation: Dalton Trans., 2017, Accepted Manuscript
  •   Request permissions

    Rapid Self-Healing and Anion Selectivity in Metallosupramolecular Gels Assisted by Fluorine-Fluorine Interactions

    L. Arnedo-Sanchez, N. Nonappa, S. Bhowmik, S. Hietala, R. Puttreddy, M. Lahtinen, L. De Cola and K. Rissanen, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT00983F

Search articles by author