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  4. A combined QM/MM and Classical Molecular Dynamics Study of [Ru(bpy)3]2+ in Water
 
research article

A combined QM/MM and Classical Molecular Dynamics Study of [Ru(bpy)3]2+ in Water

Moret, M.E.
•
Tavernelli, I.  
•
Rothlisberger, U.  
2009
The Journal of Physical Chemistry B

The solvation of the Ru(bPy)(3) (bpy = 2,2'-bipyridyl) cation was studied by molecular dynamics simulations, using both a hybrid QM/MM Car-Parrinello scheme and a classical force field. The trajectory analysis reveals that the first solvation sphere consists of chains of H-bonded water molecules intercalating between the bpy ligands, which in turns induces an organization of the second solvation sphere. Comparison with a simple charged sphere model shows the influence of the geometry of the cation and its ligands on the surrounding water. A water residence time in the first solvation shell of Ru(bpy)(3) of 12.4 ps is computed, which is significantly larger than the value of 4.5 ps found in bulk water. On the other hand, due to the one-dimensional arrangement of hydrogen bonds, the dipole of the water molecules can easily reorient, providing a way to explain the fast solvent dependent relaxation dynamics observed following photoexcitation.

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Type
research article
DOI
10.1021/jp900147r
Web of Science ID

WOS:000266545500003

Author(s)
Moret, M.E.
Tavernelli, I.  
Rothlisberger, U.  
Date Issued

2009

Published in
The Journal of Physical Chemistry B
Volume

113

Issue

22

Start page

7737

End page

7744

Subjects

Density-Functional Theory

•

Long-Range Interactions

•

Excited-States

•

Metal-Complexes

•

Anticancer Compounds

•

Charge-Transfer

•

Force-Field

•

B-Dna

•

Simulations

•

Approximation

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LCBC  
Available on Infoscience
August 17, 2009
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/42088
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