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April 23, 2026ChemistryEurope0 citationsOpen Access

Acid/Base-Triggered Optical Switching and Singlet Oxygen Generation from Azahelicene

Acid/Base‐Triggered (Chir)Optical Switching and Efficient Singlet Oxygen Generation from a Pyrene‐Extended Azahelicene

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Authors

SSSudeep SarkarNDNícolas Oliveira DecarliDJDamien Jardel

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Overview

This research demonstrates efficient singlet oxygen generation through optical switching in photofunctional materials, suggesting new applications for triggered responses.

Key Points

  • The study aims to examine the optoelectronic and chiroptical properties of a pyrene-extended azahelicene under varying protonation conditions.
  • Synthesis of a pyrene-extended azahelicene with 14 fused aromatic rings
  • Evaluation of protonation effects on optical properties
  • Measurement of singlet oxygen generation efficiency under induced states
  • Protonation led to a redshift in absorption into the near-infrared region
  • Fluorescence was quenched in the protonated form
  • The neutral form demonstrated a singlet-to-triplet intersystem crossing of 66%, resulting in significant singlet oxygen generation (Φ Δ = 0.62)

Cite This Study

Sarkar et al. (2026) studied this question.

synapsesocial.com/papers/69e9ba6b85696592c86ec95ahttps://doi.org/10.1002/ceur.70278
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