Exciton transfer free energy from Car-Parrinello molecular dynamics.
Exciton transfer free energy from Car-Parrinello molecular dynamics.
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Car-Parrinello 分子动力学中的激子转移自由能
DOI:
10.1039/c9cp06419b
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
N. L. Doltsinis
中科院分区:
文献类型:
--
作者:
C. Schwermann;N. L. Doltsinis
A computational approach is presented which allows the calculation of free energies profiles for exciton transfer processes within the framework of ab initio molecular dynamics (AIMD) simulations, sampling both the electronic and the nuclear degrees of freedom. To achieve this, restraining potentials are imposed on the centres of maximally localized Wannier orbitals. The resulting quantum-mechanical orbital forces are derived analytically and implemented in an AIMD program. In analogy to classical umbrella sampling techniques, these restraints are used to control an exciton transfer by incrementally moving the Wannier centres corresponding to the electron–hole pair along a suitable reaction coordinate. The new method is applied to study exciton transfer between two stacked penta(3-methylthiophene) molecules as a function of intermolecular distance. From the resulting free energy profiles, exciton transfer rates and diffusion constants are estimated, which prove to be in line with experimental results.
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DOI:
10.1039/c6cp00528d
发表时间:
2016
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
Pablo Ramos;M. Pavanello
通讯作者:
M. Pavanello
DOI:
--
发表时间:
2019
期刊:
影响因子:
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作者:
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通讯作者:
西川浩矢
影响因子:
2.4
作者:
Damjanovic, A;Kosztin, I;Schulten, K
通讯作者:
Schulten, K
影响因子:
5.7
作者:
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通讯作者:
Ito, Shinzaburo
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
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通讯作者:
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