Photophysical study of new versatile multichromophoric diads and triads with BODIPY and polyphenylene groups.
The photophysical properties of multichromophoric dyes with borondipyrromethene (BODIPY) and poly- p-phenylene (di- p-phenylene and tri- p-phenylene) groups in the same molecule are studied in detail. The excitation of the polyphenylene moiety in the UV region leads to a strong visible fluorescent emission of the BODIPY chromophore, via intramolecular excitation energy transfer between both groups. Consequently, these multichromophoric dyes are characterized by a large "virtual" Stokes shift, with a high fluorescence capacity and an efficient laser emission. On the other hand, the photophysical properties of a related dichromophoric dye with a hydroxy end group at the di- p-phenylene moiety show an important decrease in the fluorescent emission due to a photoinduced electron transfer process in basic media. Therefore, its photophysical properties are sensitive to the environmental acidity/basicity and could be applied as a proton sensor.
Departamento Quimica Fisica, Universidad del Pais Vasco-EHU, Apartado 644, 48080-Bilbao, Spain.
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J
Bañuelos
F
F
López Arbeloa
T
T
Arbeloa
S
S
Salleres
F
F
Amat-Guerri
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M
Liras
I
I
López Arbeloa
D001896:Boron Compounds / Q000737:chemistry*; D003198:Computer Simulation; D003516:Cycloparaffins / Q000737:chemistry*; D004735:Energy Transfer; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D010777:Photochemistry; D011789:Quantum Theory
C095489:4,4-difluoro-4-bora-3a,4a-diaza-s-indacene; D001896:Boron Compounds; D003516:Cycloparaffins; D005456:Fluorescent Dyes; C509547:poly-para-phenylene