Photoswitchable Catalysis by a Nanozyme Mediated by a Light-Sensitive Cofactor

Area of Science:

• Nanotechnology
• Catalysis
• Photochemistry

Background:

• Gold nanoparticles are widely used as catalysts.
• Controlling catalytic activity with external stimuli is crucial for advanced applications.
• Developing light-responsive catalytic systems offers precise temporal and spatial control.

Purpose of the Study:

• To develop a light-switchable catalyst based on gold nanoparticles.
• To investigate the reversible regulation of catalytic activity using light.
• To demonstrate the system's functionality in aqueous environments for potential biological integration.

Main Methods:

• Synthesis of gold nanoparticle-based catalysts.
• Utilizing a small molecule photoswitch (cis- and trans-isomers) to modulate nanoparticle activity.
• Characterization of catalytic activity under different light conditions.
• Testing system performance in aqueous buffer solutions.

Main Results:

• Gold nanoparticle catalyst activity was successfully and reversibly modulated by light.
• The small molecule photoswitch effectively inhibited catalytic activity to varying degrees based on its isomeric state.
• The light-responsive catalytic system demonstrated robust function in aqueous buffer.

Conclusions:

• A novel light-switchable gold nanoparticle catalyst was developed.
• The system allows for precise, reversible control of catalysis via light.
• The demonstrated aqueous compatibility opens avenues for integration into biological systems and networks.