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QM/MM: Dipole Moment Calculation<br />

• Analysis <br />

– take the mean value to es4mate temperature and entropy <br />

effects due to the water environment <br />

– Dipole moment in water at 300 K: 4.50978 D <br />

– Dipole moment in the gas phase at 0 K: 3.08990 D <br />

– The dipole moment increases due to the water enviroment and <br />

temperature effect. <br />

• geometry varia4on with respect to the gas phase (temperature effect) <br />

• different polariza4on of the electronic wave func4on <br />

CPMD <br />

gas phase opt <br />

T = 0 K <br />

QMMM <br />

in water <br />

T = 300 K

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