Safranine in its ground state in the pH range from 2.5 to 6.0 is largely present in its monoprotonated form. Laser excitation followed by intersystem crossing leads to the triplet state. In the triplet state, the favorable species is the diprotonated form in this pH range. The rate constants for pro
Protonation of the triplet state of safranine in the presence of cationic micelles and polyelectrolytes
β Scribed by Ieda A. Pastre; Miguel G. Neumann
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 486 KB
- Volume
- 79
- Category
- Article
- ISSN
- 1010-6030
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
Electron spin resonance and phosphorescence of phosphorescent triplet states of quinoline, isoquinoline and their protonated cations were studied in methanol:water (4:l by volume) and in stretched poly(viny1 alcohol) films at 77 K. The zero-field splitting parameter 101 of isoquinoline decreases on
Time-resolved and steady state equations for successive singlet and triplet quenching by the same quencher in micelles are developed. The model assumes that: (i) the quencher can distribute between micellar and aqueous phases, (ii) the probe is completely micellized, and (iii) the distribution kinet
Pseudo-first-order rate constants (k obs ) for alkaline hydrolysis of 4-nitrophthalimide (NPTH) decreased by nearly 8-and 6-fold with the increase in the total concentration of cetyltrimethyl-ammonium bromide ([CTABr] T ) from 0 to 0.02 M at 0.01 and 0.05 M NaOH, respectively. These observations are