Solvatochromic, thermochromic and pH-sensory DCDHF-hydrazone molecular switch: Response to alkaline analytes

Tawfik A. Khattab*, Brylee David B. Tiu, Sonya Adas, Scott D. Bunge, Rigoberto C. Advincula

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


Multi-stimuli responsive DCDHF-hydrazone molecular switch containing a hydrazone recognition moiety is developed for the naked-eye detection of alkaline analytes in both vapour and aqueous media. Mechanisms accounting for the thermochromism, pH-sensitivity and solvatochromism are proposed. DCDHF-hydrazone chromophores of different substituents introduced nanostructures with different morphologies via a re-precipitation technique. The films formulated from these nanostructures function as solid-state vapochromic sensors for probing alkaline vapours such as amines and ammonia. The sensing performance is reversible and has differential sensitivity towards a variety of amines at comparable concentrations. The structure of the hydrazone molecular switch was established spectroscopically and by single crystal X-ray crystallography.

Original languageEnglish
Pages (from-to)102296-102305
Number of pages10
JournalRSC Advances
Issue number104
Publication statusPublished - 2016 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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