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Related Experiment Videos

A study of conical intersections for the H3(+) system.

P Barragán1, L F Errea, A Macías

  • 1Laboratorio Asociado al CIEMAT de Física Atómica y Molecular en Plasmas de Fusión, Departamento de Química, Universidad Autónoma de Madrid, 28049 Madrid, Spain.

The Journal of Chemical Physics
|May 20, 2006
PubMed
Summary
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This study presents a model for conical intersections in H3(+) excited states. It examines how a fourth intersection influences the connections between these important electronic states.

Area of Science:

  • Theoretical Chemistry
  • Quantum Chemistry
  • Molecular Spectroscopy

Background:

  • Conical intersections are critical points in molecular potential energy surfaces where electronic states become degenerate.
  • Understanding these intersections is vital for predicting and explaining photochemical reactions and spectroscopic properties.
  • The H3(+) cation presents a fundamental system for studying electronic structure and dynamics.

Purpose of the Study:

  • To develop a parametrization for three asymptotic conical intersections in the H3(+) system.
  • To investigate the impact of a fourth conical intersection on the connectivity of these regions.
  • To compare results using diatomics-in-molecules (DIM) and ab initio methods.

Main Methods:

  • Parametrization of potential energy surfaces.

Related Experiment Videos

  • Computational modeling of conical intersections.
  • Comparison of DIM and ab initio electronic structure calculations.

    • Main Results:

    • A detailed parametrization of the three conical intersections is provided.
    • The influence of the fourth conical intersection on the topology of the potential energy landscape is elucidated.
    • Discrepancies and agreements between DIM and ab initio data are highlighted.

    Conclusions:

    • The study offers a comprehensive model for understanding conical intersections in H3(+).
    • The findings provide insights into the complex interplay between different electronic states.
    • This work contributes to the accurate theoretical description of molecular systems with multiple conical intersections.