Proflavin hydrochloride

Approximate Rates of Intersystem Crossing (sec.-1) for Eosin Di-Anion and Proflavine Hydrochloride... 

Fig. 15. Delayed emission spectra of 10 W proflavine hydrochloride in glycerol (left) and ethanol (right).s [Excitation at 2.73 n l (366 m/ )]. (1) Fluorescence emission spectrum at 20°C. (2) delayed emission spectrum (DES) at 20°C. (3) DES at —18° (4) DES at —38° (5) DES at —76°. Delayed emission spectra at a sensitivity approximately 80 times greater than that for the fluorescence emission spectrum. (6) Fluorescence emission spectrum at 20° (7) DES at 20° (8) DES at 0° (9) DES at —21° (10) DES at —39° (11) DES at —74°. Delayed emission spectra at a sensitivity approximately 10,000 times greater than that for the fluorescence emission spectrum.

Approximate Lifetimes and Triplet Formation Efficiencies of Proflavine Hydrochloride in Glycerol... 

Approximate values of v and r for proflavine hydrochloride are shown in Table III. As judged by both quantities, triplet quenching processes appear to have largely disappeared at a temperature as high as —58 °C. This is in marked contrast to eosin (see Table II). The value of... 

It will have been obvious from the previous discussion that the data available for eosin and proflavine hydrochloride are far less complete than could be desired. More extensive data in various solvents as a function of temperature (including the region below 77 °K.) would allow more reliable values of intersystem crossing rates to be calculated. It would be interesting to compare these rates for a variety of dyestuffs, or... 

The delayed fluorescence produced by triplet-triplet quenching is to be sharply differentiated from that observed with eosin or proflavine hydrochloride. The latter type has the same lifetime as the triplet and its intensity is proportional to the first power of the rate of light absorption. It is produced by thermal activation of molecules from the triplet level to the excited singlet level and can occur with any substance for which... 

Fig. 26. Sensitized anti-Stokes delayed fluorescence from anthracene.60 Normal fluorescence (curve 1) and delayed fluorescence (curve 2) from a solution containing 10- Af proflavine hydrochloride and 5 X 10-4M anthracene in ethanol excited by 436 m/ , 3 X 10-4 einstein liter-1 sec.-1 absorbed. Curve 1 at a sensitivity 3000 times less than curve 2. Temperature was — 66°C. 3°C.

Triplet-Singlet Phosphorescence eosin, proflavine hydrochloride, phenanthrene. 

SYNS 3,6-ACRIDINEDIAMINE, MONOHYDROCHLORIDE (9CI) 3,6-DIAMINOACRIDINE MONOHYDROCHLORIDE 3,6-DIAMINOACRIDINIUM CHLORIDE 3,6-DIAMINOACRIDINIUM CHLORIDE HYDROCHLORIDE 2,8-DIAMINOACRIDINIUM CHLORIDE MONOHYDROCHLORIDE PROFLAVINE HYDROCHLORIDE... 

Figure 11 Encapsulation of proflavin hydrochloride by L-lysine-based dendrons. ...

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