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The Journal of physical chemistry A 2018

DOI: 10.1021/acs.jpca.7b10033 pdf

To provide tools to interpret photochemical reactions, in this paper we demonstrate how a recently developed density-based index (DCT), up to now used in conjunction with time dependent density functional theory methods, can be extended to multiconfigurational methods. This index can guide chemists in the interpretation of photochemical reactions providing a measure of the spatial extent of a photoinduced charge transfer and, more generally, of charge transfer phenomena. This qualitative and quantitative description can be particularly relevant in the case of multiconfigurational calculations providing a simple tool for the interpretation of their complex outputs. To prove the potentiality of this approach we have considered a simple intramolecular excited state proton transfer reaction as study case and applied both wave function (CASSCF-CASPT2) and density-based methods in conjunction with a DCT analysis. Our re...

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