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Quantum-Classical Modeling of Chemical Phenomena
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Quantum-Classical Modeling of Chemical Phenomena
CSIC Building (#406),
Seminar Room 4122.
Directions: home.cscamm.umd.edu/directions
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QM/MM Simulation of chemical reactions in solution and in enzymes
Weitao Yang
Duke University
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Abstract:
Combined QM/MM methods provide an accurate and efficient energetic description of complex chemical and biological systems, leading to significant advances in the understanding of chemical reactions in solution and in enzymes. Ab initio QM/MM methods capitalize on the accuracy and reliability of the associated quantum mechanical approaches, however at a much higher computational cost compared with semiempirical quantum mechanical approaches. Thus reaction path and activation free energy calculations encounter unique challenges in simulation timescales and phase space sampling. Recent developments of the QM/MM minimum free energy path method overcome these challenges and enable accurate free energy determination for reaction processes in solution and enzymes. The key is the sequential sampling and optimization on the potential of mean force surface. Applications to several systems will be featured. |
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