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Updated: Jul 14, 2026
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Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
Published on: October 28, 2015
Ionic-liquid-assisted aggregation modulation of BODIPY nanoparticles for tunable photodynamic therapy performance
Nayana Nupur Das1, Dhanya Rajendrababu2, Sudip Gorai3,4
1Department of Chemistry, National Institute of Technology, Tiruchirappalli, Tamil Nadu-620015, India. debashis@nitt.edu.
Physical Chemistry Chemical Physics : PCCP
|July 13, 2026
Summary
This study introduces a novel method using ionic liquids to enhance BODIPY dye nanoparticles for photodynamic cancer therapy. The ionic liquid-assisted nano-formulations improve triplet conversion and singlet oxygen generation, leading to effective cancer cell killing with low dark toxicity.
Area of Science:
- Materials Science
- Nanotechnology
- Photochemistry
Background:
- Development of heavy atom-free triplet photosensitizers is crucial for effective photodynamic therapy (PDT) with reduced dark toxicity.
- Current design strategies for photosensitizers are often laborious, time-consuming, and not cost-effective.
- BODIPY dyes are promising photosensitizers but require optimization for enhanced triplet conversion.
Purpose of the Study:
- To develop a new strategy for enhancing triplet conversion of BODIPY dyes using ionic liquid (IL) assisted nano-formulations.
- To investigate the combined effects of molecular π-conjugation and IL-induced aggregation on photosensitizer performance.
- To optimize BODIPY-based nanoparticle photosensitizers for improved photodynamic therapy applications.
Main Methods:
- Synthesis of two BODIPY derivatives: BDP and styryl-BDP.
- Formulation of BODIPY dyes into nanoparticles with and without a symmetric ionic liquid (1,3-diethylimidazolium bromide, C2C2im-Br).
- Spectroscopic (absorption, emission), microscopic, DPBF assays, intracellular ROS imaging, and DFT calculations were employed.
Main Results:
- Ionic liquid incorporation induced significant aggregation and morphological changes, enhancing triplet generation capabilities of both BODIPY dyes.
- Styryl-BDP showed suppressed fluorescence upon IL-induced aggregation, favoring triplet-state formation and leading to enhanced singlet oxygen generation.
- IL-modified nanoparticles demonstrated increased light-triggered oxidative stress in HeLa cells and enhanced cytotoxicity with low dark toxicity.
Conclusions:
- Ionic liquid-assisted aggregation provides a rational strategy to enhance the photodynamic performance of BODIPY-based nanoparticle photosensitizers.
- Combining π-conjugation engineering with IL-induced aggregation effectively tunes singlet oxygen generation for improved PDT.
- The developed nano-formulations offer a promising approach for developing effective and low-toxicity photosensitizers for cancer therapy.
