Visible light-triggered fluorescence and pH modulation using metastable-state photoacids and BODIPY

Area of Science:

• Chemical Biology
• Photochemistry
• Molecular Systems

Background:

• pH gradients are crucial in biological and chemical processes.
• High-sensitivity monitoring and regulation systems with minimal photo-fatigue are needed.

Purpose of the Study:

• To develop a visible light-triggered molecular system for reversible pH and fluorescence regulation.
• To create a robust bi-functional system for sensitive acid-mediated studies.

Main Methods:

• Utilized a metastable-state photoacid (mPAH) and a boron-dipyrromethene (BODIPY) derivative.
• Employed the inner filter effect for fluorescence modulation.
• Achieved reversible pH and fluorescence control using visible light.

Main Results:

• Demonstrated a molecular system for reversible pH and fluorescence modulation.
• Showcased consistent control over pH (around one magnitude) and fluorescence.
• Confirmed system robustness over multiple cycles with minimal photo-fatigue.

Conclusions:

• The developed bi-functional system offers a novel approach for sensitive studies involving acid-mediated processes.
• This system enables precise, light-triggered regulation of both acidity and fluorescence.
• Opens new avenues for research requiring fine-tuned control over pH and optical signals.