Products of photodegradation for coumarin laser dyes
Abstract
The products of conventional photolysis of the coumarin laser dyes, Cl, C35, Cl53, and Cl52 have been investigated. The previously reported dealkylation of Cl is documented for the fluorinated dyes, C35, and Cl52 in deaerated solvents. In addition, a reduction product is identified for Cl, consistent with a radical mechanism for decomposition. Evidence is provided that the concentration quenching (self quenching) of singlet dye is important to the degradation mechanism. For the rigid dye, Cl53, a photooxidation product involving the amine functionality results from decomposition in aerated media. For several dyes, very low triplet yields have been measured.
- Publication:
-
Technical Report
- Pub Date:
- October 1983
- Bibcode:
- 1983bu...reptR....J
- Keywords:
-
- Dye Lasers;
- Dyes;
- Fluorination;
- Photodecomposition;
- Photolysis;
- Alkyl Compounds;
- Amines;
- Concentration (Composition);
- Degassing;
- Lasers;
- Nitriles;
- Oxidation;
- Poisons;
- Quenching (Cooling);
- Reduction (Chemistry);
- Lasers and Masers