Abstract

In this work the solvent effects on the structure and metal-to-ligand charge transfer (MLCT) transition of the complex [Ru(NH3)5(Pyrazine)]2+ was investigated in aqueous solution, using the hybrid Density Functional Theory/Effective Fragment Potential Hamiltonian (DFT/EFP/MD) approach. The MLCT transition causes a large charge separation in the complex and produces a dipole moment variation of 8.3±1.1Debye upon excitation in solution and causes a large red-shift of 0.55±0.15eV. The solvatochromic shift can be attributed to the large charge separation accompanying the MLCT transition in solution.

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