Investigation of the Qx–Qy Equilibrium in a Metal‐Free Phthalocyanine |
| |
| Authors: | Dipl. Chem. Yannick Baeten Dr. Eduard Fron Dr. Christian Ruzié Prof. Dr. Yves Henri Geerts Prof. Dr. Mark Van Der Auweraer |
| |
| Affiliation: | 1. Department of Chemistry, Division of Molecular Imaging and Photonics, KULeuven, Celestijnenlaan, Heverlee, Belgium;2. Department of Chemistry, Laboratory of Polymer Chemistry, Université Libre de Bruxelles, Chimie des Polymères, Brussels, Belgium |
| |
| Abstract: | Phthalocyanines (Pcs) have attracted a lot of interest as small molecules for organic electronics. However, some excited‐state properties of metal‐free phthalocyanines, as for example, the dynamics of the transition between the nondegenerate Qx and Qy states in a metal‐free phthalocyanine, have not been fully established. This effect results in a blue‐shifted shoulder with low intensity in the Pc fluorescence spectrum. This shoulder was suggested to be related to emission from the more energetic Qy state. By using ultrafast femtosecond transient absorption, we have found a clear equilibrium between the Qx and Qy state of metal‐free phthalocyanines in solution. |
| |
| Keywords: | chromophores fluorescence spectroscopy photophysics phthalocyanines pump probe |
|
|
