Effect of iodine substitution pattern on the singlet oxygen generation and solvent depended keto-enol tautomerization behavior of BODIPY photosensitizers

The effect of iodine substitution pattern on the singlet oxygen generation were investigated. Surprisingly, the addition of iodine atoms to the meso-aryl positions of the phenyl moiety caused a color change due to the keto-enol tautomerization depend on the using solvent. This solvent affected keto-enol tautomerization on the BODIPY compounds was determined for the first time.91