Effect of substituent position on optical properties of boron-dipyrromethane isomers

摘要

Three isomeric meso-SiMe_3C_6H_4 substituted BODIPYs have been synthesized and their optical properties studied. The constitutional isomers show similar absorption properties but vastly different emissive properties as a result of their different conformational flexibility. Fluorine-19 NMR study is used to unravel the conformational state of the BODIPY isomers at a molecular level.