Truncated Transition Densities for Analysis of (Nonlinear) Optical Properties of carbo-Chromophores

作者: Corentin Poidevin , Christine Lepetit , Nadia Ben Amor , Remi Chauvin

DOI: 10.1021/ACS.JCTC.6B00484

关键词: Atomic physicsMolecular electronic transitionAbsorption spectroscopyTransition dipole momentExcited stateDipoleChemistryChromophoreMolecular orbitalTime-dependent density functional theory

摘要: The optical properties of several quadrupolar carbo-benzene derivatives are investigated at various levels calculation (TDDFT and CASPT2) analyzed using a new theoretical tool here disclosed: “visualization” the transition dipole moment from density truncated to main monoexcitations involved in electronic (TTD). experimental or calculated one-photon UV–visible absorption spectra fit with Gouterman model originally proposed for porphyrins, where first four excited states involve linear combinations same frontier molecular orbitals. relative intensities bands moments TTDs an analogy between porphyrins carbo-benzenes is argued. two-photon (TPA) cross section related third-order nonlinear response each two-photon-allowed state |f⟩ cont...

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