Title: Spectral, Acid−Base, and Laser Characteristics of 1,4-Bis[β-(2-quinolyl)vinyl]benzene (BQVB)
Abstract: The diolefinic dye BQVB is an efficient fluorescer with φf values as high as 0.82 in n-heptane. The dye exhibits low values of the excited state lifetimes of ca. 0.4 ns. Both electronic absorption and fluorescence spectra are sensitive to medium acidity, and in acidic media a strong fluorescence is obtained at 500 nm. The laser activity of BQVB has been investigated. The dye solution in N,N-dimethylformamide (DMF) gives laser emission around 450 nm upon excitation by 337.1 nm nitrogen laser pulse. The excited state absorption S2 ← S1 of BQVB has been measured using laser flash photolysis, and in DMF the S2 ← S1 absorption occurs at ca. 762 nm. Energy transfer from BQVB to rhodamine 6G and to molecular oxygen has been studied. The quantum yields for the trans−cis photoisomerization (φc) of BQVB in different organic solvents are also reported.
Publication Year: 1996
Publication Date: 1996-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 27
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