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Dual-Mode Fluorescence Modulation Using Ferrocene-Dithienylethene-Pyromellitic Diimide-Based Photoswitchable

Subhendu Jana1, Sayan Kumar Bag1, Santanab Giri2

  • 1Department of Chemistry, Jadavpur University, Kolkata, India.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|May 29, 2026
PubMed
Summary

This study introduces a novel ferrocene-pyromellitic diimide-dithienylethene (Fc-PmDI-DTE) triad for dual-mode fluorescence switching. This material enables advanced applications in anticounterfeiting and logic gate construction.

Keywords:
anticounterfeitingdithienyletheneförster resonance energy transferlogic gatesmultifunctional photoswitchphotoinduced electron transfer

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Photochemistry

Background:

  • Development of advanced materials for fluorescence switching.
  • Need for efficient photochromic and redox-responsive systems.
  • Exploration of multifunctional triads for complex applications.

Purpose of the Study:

  • To design and synthesize a novel ferrocene-pyromellitic diimide-dithienylethene (Fc-PmDI-DTE) triad.
  • To achieve dual-mode fluorescence switching via photoinduced electron transfer (PET) and Förster resonance energy transfer (FRET).
  • To explore applications in logic gate construction and anticounterfeiting.

Main Methods:

  • Synthesis of a nonconjugated Fc-PmDI-DTE multifunctional triad.
  • Investigation of photoinduced reversible fluorescence switching through DTE photoisomerization.
  • Utilizing ferrocene redox activity for PET-mediated fluorescence modulation.

Main Results:

  • Demonstrated efficient photoinduced reversible fluorescence switching with high quantum yields in both solution and solid states.
  • Achieved a 94.3% cyclization conversion yield at the photostationary state, indicating high photochromic efficiency.
  • Successfully constructed complex binary logic gates (AND, OR, NOT) using external stimuli (Fe3+, LAS, UV/Vis light).

Conclusions:

  • The developed Fc-PmDI-DTE triad exhibits excellent reversible photoswitching and fatigue resistance.
  • The system shows promising applications in deciphering secret codes and anticounterfeiting technologies.
  • This work highlights the potential of multifunctional triads in advanced optical information processing.