1,7-Disubstituted boron dipyrromethene (BODIPY) dyes: synthesis and spectroscopic properties.

1,7-Dihalogenated boron dipyrromethene dyes were successfully synthesized and substituted, thus providing an entry to the final, elusive reactivity pattern. The spectroscopic properties of 1,7-disubstituted BODIPY dyes were studied and are discussed as a function of their structure.