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Tuning Sensing Efficacy of Oligo(phenylenevinylene) Based Chromogenic Probes: Effect of Alkyl Substituents on Metal Ion Detection at Micelle-Water Interface.

Harshal V BarkaleNilanjan Dey
Published in: Chemistry, an Asian journal (2024)
In this work, we conducted a comparative analysis of the metal ion sensing capabilities of two pyridine-end oligo p-phenylenevinylene compounds featuring different alkyl substituents (-C 4 H 9 and -C 16 H 33 ) within a micelle medium. Our findings revealed a correlation between the positioning of the probe molecules within the micelle and the length of the alkyl chains, impacting their self-assembly tendencies and optical characteristics. The compound with shorter alkyl chains demonstrated a superior affinity towards Hg 2+ ions, whereas exposure to the compound with longer alkyl substituent resulted in a color-changing response with both Cu 2+ and Hg 2+ ions. Intriguingly, the sensitivity towards Hg 2+ ions heightened with increasing alkyl chain length. This trend persisted in non-polar solvents like THF. The capacity to modulate sensing efficacy solely by adjusting the length of the alkyl chains represents a relatively uncommon occurrence in the existing literature. This discovery suggests promising prospects for engineering sensory devices equipped with adaptable sensitivity.
Keyphrases
  • ionic liquid
  • aqueous solution
  • quantum dots
  • living cells
  • fluorescent probe
  • visible light
  • systematic review
  • risk assessment
  • mass spectrometry
  • high throughput
  • water soluble
  • single molecule
  • real time pcr