Products of photodegradation for coumarin laser dyes. Technical report No. 7, 1 January-31 October 1982

Technical Report · Mon Oct 31 00:00:00 EST 1983

OSTI ID:5135140

Jones, G II; Jackson, W R; Kanoktanaporn, S; Bergmark, W R

The products of conventional photolysis of the coumarin laser dyes, C1, C35, C153, and C152 have been investigated, The previously reported dealkylation of C1 is documented for the fluorinated dyes, C35, and C152 in deaerated solvents. In addition, a reduction product is identified for C1, 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, C153, a photooxidation product involving the amine functionality results from decomposition in aerated media. For several dyes, very low triplet yields have been measured.

• Research Organization: Boston Univ., MA (USA). Dept. of Chemistry
• OSTI ID: 5135140
• Report Number(s): AD-A-136308/4; TR-7
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COUMARINS
PHOTOLYSIS
ACETONITRILE
ALKYL RADICALS
AMINES
DYES
FLUORINATION
LASERS
OXIDATION
QUENCHING
ANTICOAGULANTS
CHEMICAL REACTIONS
DECOMPOSITION
DRUGS
HALOGENATION
HEMATOLOGIC AGENTS
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
RADICALS
400500* - Photochemistry