𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Excited-state proton transfer in 2-(2′-hydroxyphenyl)benzothiazole: Transient electronic absorption measured on the picosecond time scale

✍ Scribed by T. Elsaesser; B. Schmetzer; M. Lipp; R.J. Bäuerle

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
654 KB
Volume
148
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

Transient absorption spectra of 2-(2'-hydroxyphenyl)benzothiazole (HBT) were studied in various solvents after picosecond excitation, Strong absorption bands are observed in the wavelength range from 400 to 500 nm. The kinetics of the absorption change consists of a first component with a decay time of 14 to 300 ps depending upon the solvent and a second one, which is constant up to 1 ns. A comparison with the emission kinetics of HBT shows that the first component is caused by transitions from the fluorescing level of the HBT keto tautomer to higher singlet states; the long-lived contribution is attributed to the keto ground state.

📜 SIMILAR VOLUMES

Excited-state proton transfer in 2-(2'-h
Excited-state proton transfer in 2-(2'-hydroxyphenyl)benzothiazole: formation of the anion in polar solvents
✍ T. Elsaesser; B. Schmetzer 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 630 KB

Excited-state proton transfer in 2-(2'-hydroxyphenyl)benzothiaxole (HBT) dissolved in pyridine is investigated. New absorptions and fluorescence bands are detected after addition of water or NaOH to the solution. The spectra are identical to the HBT anion absorption and fluorescence. Picosecond spec