Recent progress in approximate quantum dynamics methods for the study of proton-coupled electron transfer reactions

Area of Science:

• Physical Chemistry
• Computational Chemistry
• Biophysical Chemistry

Background:

• Proton-coupled electron transfer (PCET) reactions are fundamental to energy conversion in photosynthesis and respiration.
• Quantum effects significantly influence PCET reaction rates and mechanisms.
• Decades of theoretical development have focused on modeling these complex reactions.

Purpose of the Study:

• To review recently developed computational methods (last 8 years) for modeling PCET reactions.
• To highlight methods that quantitatively capture quantum effects in PCET.
• To provide efficient means for qualitative descriptions of PCET in complex systems.

Main Methods:

• Focus on recently developed theoretical and computational methods.
• Discussion of theoretical background and accuracy of each method.
• Presentation of PCET simulations using these methods.

Main Results:

• New methods can quantitatively capture quantum effects like proton tunneling and non-adiabatic transitions.
• These methods offer efficient qualitative descriptions for complex PCET systems.
• Accuracy of methods is discussed with respect to exact results.

Conclusions:

• Recent advancements provide powerful tools for studying PCET reactions.
• Accurate modeling of quantum effects is essential for understanding energy conversion and biological processes.
• These methods advance the computational study of complex chemical and biological systems.