The blue and red fluorcscencc of cryptocyanine colutions Wits observed under conditions of steady-stay light evcltation and during Q-swttched ruby her cxitation. Experimental results give evidence that tilt blue fiuore~fcncc IS Sz -\* So transition.
Distinction of the delayed fluorescences S1 → S0 And S2 → S0 of pyrene by selective quenching Of S1 → S0
✍ Scribed by Bernhard Nickel; Gabriele Roden
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 319 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
Ln the spectrum of the delayed fluorescence (DF) of pyrene, caused by triplet-triplet anndulation Tt + Tt -, Sn + SO (II = 1.2). a strong DT St -r SO and a very weak DF Sz * SO are observed. The DF S1 -t SO IS quenched seletively by cornpounds hhe Nðylaniline or trrethylamme which do not quench T1 of pyrene.
📜 SIMILAR VOLUMES
We preses the SI -1 So fluorescente spectrum, between 740 and 940 om, of azulene sohitions (íOm3 M ìn methanol) excited wïth a @svitched ruby laser. The nitrogerrlaser excïted Sz + SI fíuorescence spectrum, between 700 and 930 om, is also reporteb Tbe transient St + Sn s@etrmn between 500 and 6.50 r
Rotationatly resolved fluorescence excitation spectra of two vibronic bands at AE= 410.5 and 414.9 cm -l in the S l ~ S O electronic transition of trans-l-naphthol have been recorded and analyzed. The analysis reveals that the in-plane transition dipole moment of the 410 cm-1 band makes an angle of
The 3 A 2 (nπ \* ) → 1 A 1 X (T 1 → S 0 ) phosphorescence excitation spectrum of jet-cooled xanthione was investigated in the region 14 920-17 600 cm -1 . The structure observed is shown to be due to the T 1 ← S 0 absorption and an assignment in terms of the vibronic structure of that band is propos