Issue 19, 2019

Kasha's rule: a reappraisal

Abstract

This work revises some anomalous cases reported in the literature, which seemingly violate Kasha's rule. To the contrary, apart from azulene, the remaining molecules fulfill Kasha's rule. Kasha's rule must be stated just as in the seminal paper (M. Kasha, Discuss. Faraday Soc., 1950, 9, 14–19): “The emitting electronic level of a given multiplicity is the lowest excited level of that multiplicity”. Therefore, Kasha's rule focuses on the emission (photophysics) for complex molecules, in condensed phase, for the absorption of one photon per molecule under photostationary conditions, then a rapid internal conversion and a vibrational relaxation warrant that the corresponding emission comes from the first excited electronic level regardless of which electronic state of equal multiplicity is excited.

Graphical abstract: Kasha's rule: a reappraisal

Supplementary files

Article information

Article type
Paper
Submitted
06 Feb 2019
Accepted
23 Apr 2019
First published
23 Apr 2019

Phys. Chem. Chem. Phys., 2019,21, 10061-10069

Kasha's rule: a reappraisal

J. C. del Valle and J. Catalán, Phys. Chem. Chem. Phys., 2019, 21, 10061 DOI: 10.1039/C9CP00739C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements