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Volumn 30, Issue 24, 1997, Pages 7627-7630

Direct measurement of primary radical concentrations in pulsed laser photolysis

Author keywords

[No Author keywords available]

Indexed keywords

FREE RADICAL REACTIONS; FREE RADICALS; LASER PULSES; PHOTOLYSIS; PULSED LASER APPLICATIONS; REACTION KINETICS;

EID: 0031343617     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma9708095     Document Type: Article
Times cited : (21)

References (28)
  • 14
    • 33845280104 scopus 로고
    • The low fluoresence quantum yield for NTEMPO and related species has been attributed to an intramolecular quenching mechanism (Blough, N. V.; Simpson, D. J., J. Am. Chem. Soc. 1988, 110, 1915).
    • (1988) J. Am. Chem. Soc. , vol.110 , pp. 1915
    • Blough, N.V.1    Simpson, D.J.2
  • 17
    • 85033326575 scopus 로고    scopus 로고
    • note
    • The third harmonic (355 nm) of a Q-switched Nd:YAG laser (Continuum) was used as the laser source. The pulse from the laser (∼8 mm diameter) was expanded and then collimated through two lenses, and passed through a square aperture (10 mm x 10 mm) immediately before entering the sample which was held in a thermostated cell holder. The samples were degassed by at least four freeze-pump-thaw cycles, and approximately 1.0 mL was placed in sealed quartz cuvettes (10 mm x 10 mm). A Perkin-Elmer LS-5 fluorimeter fitted with fiber optic light guides collected the time-resolved fluorescence. The laser, fluorimeter excitation and emission beams were orthogonal to each other. The average laser power was measured behind the sample holder (without the cell in position) with the laser pulsing at 10 Hz with the energy per pulse being calculated by dividing the average power by the repetition rate.
  • 18
    • 85033303479 scopus 로고    scopus 로고
    • note
    • -3 M) under laser irradiation even after the NTEMPO was consumed and ceased only when the AIBMe was depleted. The effect can be attributed to absorption of the R-NTEMPO fluorescence by the AIBMe. The small perturbation introduced was removed by extrapolation.
  • 23
    • 85033293135 scopus 로고    scopus 로고
    • note
    • 4
  • 24
    • 0000045486 scopus 로고
    • Kinetics of Bimolecular Termination
    • Eastmond, G. C., Ledwith, A., Russo, S., Sigwalt, P., Eds.; Pergamon: London
    • O'Driscoll, K. F. Kinetics of Bimolecular Termination In Comprehensive Polymer Science; Eastmond, G. C., Ledwith, A., Russo, S., Sigwalt, P., Eds.; Pergamon: London, 1989; Vol. 3, p 161.
    • (1989) Comprehensive Polymer Science , vol.3 , pp. 161
    • O'Driscoll, K.F.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.