Jump to main content
Jump to site search

Issue 10, 2018
Previous Article Next Article

Azo and imine functionalized 2-naphthols: promising supramolecular gelators for selective detection of Fe3+ and Cu2+, reactive oxygen species and halides

Author affiliations

Abstract

Azo and imine functionalised 2-naphthols 1–3 have been established as low molecular weight supramolecular gelators (LMWGs). Hydrogen bonding and π–π stacking between the naphthalene units contribute a weak force for gelation. The gels have sufficient mechanical strength and are responsive to multiple ions. While the gel of 1 in CH3CN : H2O (1 : 1, v/v) is responsive to Fe3+ and Cu2+ ions, under identical conditions the gel of 2 is sensitive to Fe3+ ions involving a gel-to-sol transition. The imine compound 3 in its gel state (DMSO : H2O; 1 : 1 v/v) displays selective interaction with Fe3+ ions over a series of other metal ions through a color change of the gel state from yellow to dark brown. Compound 3, in this context, is an LMWG that selectively detects Fe3+ and also Fe2+ in the presence of an oxidising agent. Oxidation of Fe2+ by reactive oxygen species (ROS) and its subsequent colorimetric effect on the gel of 3 finds application in ROS detection. Moreover, the Fe3+ ion-induced colored gel of 3 successfully senses F ions visually from other halides. For real-life application, a test strip of 3 for the detection of these analytes and also its use as a rewritable display material and combinational logic gate system are demonstrated.

Graphical abstract: Azo and imine functionalized 2-naphthols: promising supramolecular gelators for selective detection of Fe3+ and Cu2+, reactive oxygen species and halides

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 May 2018, accepted on 07 Aug 2018 and first published on 08 Aug 2018


Article type: Research Article
DOI: 10.1039/C8QM00257F
Citation: Mater. Chem. Front., 2018,2, 1866-1875
  •   Request permissions

    Azo and imine functionalized 2-naphthols: promising supramolecular gelators for selective detection of Fe3+ and Cu2+, reactive oxygen species and halides

    A. Panja and K. Ghosh, Mater. Chem. Front., 2018, 2, 1866
    DOI: 10.1039/C8QM00257F

Search articles by author

Spotlight

Advertisements