Journal of Cluster Science

, Volume 26, Issue 2, pp 623–630 | Cite as

Tryptophan-[Re6Se8I6]3− Cluster Interaction: A Computational Study

  • Leonor Alvarado-Soto
  • Rodrigo Ramirez-Tagle
Original Paper


The interaction between tryptophan (Trp) and the [Re6Se8I6]3− cluster is studied here using density functional theory calculations including relativistic scalar interactions via the zero-order regular approximation and solvent effects, which we describe in terms of interaction energies, Mulliken charge analysis and molecular orbitals. In the indole functional groups of the Trp-[Re6Se8I6]3− cluster conjugates, modification of the molecular orbitals associated with Trp occurs because states associated with the [Re6Se8I6]3− cluster and the hybrid orbitals have a mixed metal–molecule character, which is attributed to the stronger than expected π interactions facilitated by the indole group in Trp. Here, we find that the energy transfer from hybrid states of Trp-[Re6Se8I6]3− to clusters could reduce intrinsic fluorescence intensity of Trp in the conjugated system.


Low-energy structures Genetic algorithm Density functional theory 



We acknowledge Grant FONDECYT 11130007 and 3140002.


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Laboratorio de BionanotecnologiaUniversidad Bernardo O´HigginsSantiagoChile

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