Morpholine-Substituted Rhodamine Analogue with Multi-Configurational Switches for Optical Sensing of pH Gradient under Extreme Acidic Environments

Natsumi Koga, Masaru Tanioka, Shinichiro Kamino, Daisuke Sawada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Superior pH-responsive molecules are required for the development of functional materials applicable to advanced molecular technologies. Despite having been widely developed, many rhodamine-based pH-responsive molecules exhibit a single configurational switch for “turn-on”. Herein, we report a new type of rhodamine-based pH-responsive molecule with multi-configurational switches displaying stable two-step structural and color conversion in response to pH. This rhodamine analogue could be successfully applied to optical sensing of pH gradient under extreme acidic environments both in solution and on hydrogel through high-contrast color change. We demonstrated that this multi-responsive character enabled optical memory of different pH information.

Original languageEnglish
Pages (from-to)3761-3765
Number of pages5
JournalChemistry - A European Journal
Volume27
Issue number11
DOIs
Publication statusPublished - Feb 19 2021

Keywords

  • extreme acidity
  • optical memory
  • pH-responsive molecules
  • rhodamine
  • sensors

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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