Theoretical study of the solvatochromic properties of rhodamines using the AM1 and PM3/COSMO solvation model

Abstract
AM1 and PM3 SCF-MO/COSMO solvation modelling of the solvatochromic properties of the rhodamine-based colour forming dyes reproduces the known relative stabilities of these molecules and demonstrates how theoretically constructed linear-free-energy relationships could be used in the rational design of new systems.