Laser flash photolysis of 2-diazo-1,3-diphenyl-1,3-propanedione: An unusual long-lived triplet as a reaction intermediate

Organic Letters

Volumn 2, Issue 10, 2000, Pages 1357-1360

  Ortica, F ^a   Pohlers, G ^b   Scaiano, J C ^a   Cameron, J F ^b   Zampini, A ^b  

^a UNIVERSITY OF OTTAWA   (Canada)

^b SHIPLEY COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000753772     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol005590k     Document Type: Article

References (61)

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49. For the nanosecond laser flash photolysis work, a Lumonics EX-530 excimer laser (Xe/HCl, 308 nm, ∼6 ns pulse width, 50-100 mJ/pulse) was used for excitation. The system is controlled by a Power Macintosh computer running LabVIEW 4.1 software. A Tektronix 2440 digital oscilloscope captures the signal from the photomultiplier tube. Further details on a similar laser system have been provided elsewhere (Scaiano, J. C. J. Am. Chem. Soc. 1980, 102, 7747. Scaiano, J. C.; Tanner, M.; Weir, D. J. Am. Chem. Soc. 1985, 107, 4396). The optical densities of the samples for laser experiments were 0.2-0.3 at the excitation wavelength. A flow system (a 7 × 7 mm Suprasil quartz flow cell, connected with a 100 mL reservoir with Teflon tubing) was used in order to allow irradiation of a fresh portion of the sample by each laser shot.
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