Jablonski diagram

A Jablonski diagram showing the excitation of molecule A to its singlet excited state (1A*) followed by intersystem crossing to the triplet state (3A) that relaxes to the ground state by phosphorescence. It was used to describe absorption and emission of light by fluorescents.

In molecular spectroscopy, a Jablonski diagram is a diagram that illustrates the electronic states and often the vibrational levels of a molecule, and also the transitions between them. The states are arranged vertically by energy and grouped horizontally by spin multiplicity.[1] Nonradiative transitions are indicated by squiggly arrows and radiative transitions by straight arrows. The vibrational ground states of each electronic state are indicated with thick lines, the higher vibrational states with thinner lines.[2] The diagram is named after the Polish physicist Aleksander Jabłoński who first proposed it in 1933.[3]

  1. ^ “Jablonski Diagram.” 2006. In IUPAC Compendium of Chemical Terminoloy, 3rd ed. International Union of Pure and Applied Chemistry. https://doi.org/10.1351/goldbook.J03360.
  2. ^ P., Atkins, P., de Paula, J. Atkins' Physical Chemistry, 8th edition (2006), page 494, Oxford University Press. ISBN 0-7167-8759-8
  3. ^ Jabłoński, Aleksander "Efficiency of Anti-Stokes Fluorescence in Dyes" Nature 1933, volume 131, pp. 839-840.doi:10.1038/131839b0