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Molecules ; 25(4)2020 Feb 12.
Article in English | MEDLINE | ID: mdl-32059435

ABSTRACT

Herein we report on a straightforward access method for boron dipyrromethene dyes (BODIPYs)-coumarin hybrids linked through their respective 8- and 6- positions, with wide functionalization of the coumarin fragment, using salicylaldehyde as a versatile building block. The computationally-assisted photophysical study unveils broadband absorption upon proper functionalization of the coumarin, as well as the key role of the conformational freedom of the coumarin appended at the meso position of the BODIPY. Such free motion almost suppresses the fluorescence signal, but enables us to apply these dyads as molecular rotors to monitor the surrounding microviscosity.


Subject(s)
Boron/chemistry , Coumarins/chemistry , Porphobilinogen/analogs & derivatives , Fluorescence , Fluorescent Dyes/chemistry , Molecular Conformation , Porphobilinogen/chemistry , Spectrometry, Fluorescence
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