Jump to main content
Jump to site search

Issue 8, 2018
Previous Article Next Article

Chirality control of multi-stimuli responsive and self-healing supramolecular metallo-hydrogels

Author affiliations

Abstract

A metallo-hydrogel based on histidine and Zn2+ ions is designed using coordination driven self-assembly. The hydrogel formation is instantaneous and it exhibits stimuli-responsive behaviour with respect to pH, heat and external chemicals. The gelation ability depends on the optical purity and enantiomeric excess of the amino acids. The supramolecular chirality mediated by the Zn–histidine complex and subsequent fiber formation showed sign inversion of the CD signal with respect to that of native amino acids (L- or D-) and can be tuned by changing the ratio of the two chiral species, L-, D-amino acids. The Job's plot from the circular dichroism probing supramolecular chirality confirms the 1 : 1 complex of Zn and histidine. The viscoelastic properties and kinetics of the hydrogel can conveniently be tuned by changing its enantiomeric excess (ee%), concentration and the ratio of Zn and histidine. Moreover, the resulting metallo-hydrogel is thixotropic and exhibits instantaneous, intrinsic self-healing behaviour.

Graphical abstract: Chirality control of multi-stimuli responsive and self-healing supramolecular metallo-hydrogels

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Jan 2018, accepted on 12 Mar 2018 and first published on 13 Mar 2018


Article type: Paper
DOI: 10.1039/C8NJ00218E
Citation: New J. Chem., 2018,42, 6427-6432
  •   Request permissions

    Chirality control of multi-stimuli responsive and self-healing supramolecular metallo-hydrogels

    B. Sharma, A. Singh, T. K. Sarma, N. Sardana and A. Pal, New J. Chem., 2018, 42, 6427
    DOI: 10.1039/C8NJ00218E

Search articles by author

Spotlight

Advertisements