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Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
Published on: October 28, 2015
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Mixed-Length Multivariate Covalent Organic Framework for Combined Near-Infrared Photodynamic Therapy and Drug
Andrés Rodríguez-Camargo1,2, Erdost Yildiz3, Diego Juela1,2
1Nanochemistry Department, Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany.
Journal of the American Chemical Society
|September 8, 2025
Summary
Researchers developed novel mixed-length covalent organic frameworks (COFs) that combine near-infrared light absorption and catalysis. These advanced COFs show promise for photodynamic therapy by generating hydrogen peroxide to reduce cancer cell viability.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Covalent organic frameworks (COFs) are advanced reticular materials with tunable structures and functionalities.
- Integrating multiple components into COFs enhances complexity, but strategic engineering of diverse functionalities within a single framework is underexplored.
Purpose of the Study:
- To synthesize and characterize mixed-length multivariate COFs with tailored functionalities.
- To investigate the modulation of near-infrared (NIR) light absorption and catalytic activity through linker ratios and palladium incorporation.
- To evaluate the potential of these COFs in combined photodynamic therapy and drug delivery for cancer treatment.
Main Methods:
- Synthesis of highly crystalline mixed-length multivariate COFs using azobenzene and bipyridine linkers.
- Tuning linker ratios and incorporating palladium to control framework properties.
- Characterization of COF structure, optical properties, and catalytic activity for hydrogen peroxide generation.
- In vitro evaluation of COF efficacy in reducing breast cancer cell viability under NIR irradiation.
Main Results:
- Successfully synthesized a series of highly crystalline mixed-length multivariate COFs.
- Demonstrated effective modulation of NIR light absorption and catalytic sites by adjusting linker ratios and palladium content.
- Achieved efficient generation of hydrogen peroxide (H2O2) upon NIR irradiation.
- The optimal COF formulation reduced breast cancer cell viability by nearly 90% within 1 hour of irradiation in vitro.
Conclusions:
- Mixed-length multivariate COFs offer a novel strategy for integrating diverse functionalities within a single framework.
- These COFs can be engineered for combined photodynamic therapy and drug delivery applications.
- The developed COFs show significant potential for targeted cancer treatment utilizing NIR light and reactive oxygen species.
