Abstract
Four fluorescent dyes derived from 4,4-difluoro-4-bora-3a,4a-diaza- s-indacene (BODIPY) with unusual substituents (chloro, methoxy, and malonate) at the 3,5-positions have been synthesized by a novel nucleophilic substitution reaction of 3,5-dichloroBODIPY. Their solvent-dependent photophysical properties have been investigated by means of UV/Vis absorption, steady-state and time-resolved fluorimetry. For each compound, the fluorescence quantum yield and lifetime are lower in solvents with higher polarity due to an increase in the rate of nonradiative deactivation. The fluorescence rate constants are in the (1.6–2.0) × 10 8 s −1 range. The borondipyrromethene derivatives show small Stokes shifts (between 440 and 490 cm −1) and narrow absorption (FWHM between 710 and 820 cm −1) and emission bands.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
