Excimer formation in the photochemistry of aliphatic ketones I: concentration dependence of quantum yields
作者： L. Biczók , T. Bérces , S. Förgeteg , F. Márta
DOI: 10.1016/0047-2670(84)87069-0
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摘要: Abstract The photochemistry of 2-pentanone was studied in iso-octane at 313 nm. quantum yields the Norrish type I and II primary processes were found to increase with increasing ketone concentration attain limiting values high concentrations (above about 0.3 mol dm−3. triplet yield, by means sensitized biacetyl phosphorescence technique, showed a similar dependence. enhancement singlet → intersystem crossing ground state molecules interpreted assuming excimer formation. may redissociate into or enter followed dissociation state. Evaluation experimental results yielded rate coefficients for first-order step decomposition from
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sci-hub.se 参考文章(12)
J. Kossanyi, S. Sabbah, P. Chaquin, J.C. Ronfart-Haret, Photochemistry in solution-XX Tetrahedron. ,vol. 37, pp. 3307- 3315 ,(1981) , 10.1016/S0040-4020(01)92378-6
B. László, S. Förgeteg, T. Bérces, F. Márta, Excimer formation in the photochemistry of aliphatic ketones. II: Fluorescence decay kinetics Journal of Photochemistry. ,vol. 27, pp. 49- 59 ,(1984) , 10.1016/0047-2670(84)87070-7
Kjell Sandros, O. Bastiansen, Tove Motzfeldt, D. Heinegård, Alexandru T. Balaban, J. Cymerman Craig, Transfer of Triplet State Energy in Fluid Solutions. IV. Determination of Triplet Yields by the Measurement of Sensitized Biacetyl Phosphorescence. Acta Chemica Scandinavica. ,vol. 23, pp. 2815- 2829 ,(1969) , 10.3891/ACTA.CHEM.SCAND.23-2815
E.B. Abuin, M.V. Encina, E.A. Lissi, A comparison between gas and liquid phase photochemistry of 2-pentanone Journal of Photochemistry. ,vol. 3, pp. 143- 150 ,(1974) , 10.1016/0047-2670(74)80014-6
Peter John Wagner, Type II photoelimination and photocyclization of ketones Accounts of Chemical Research. ,vol. 4, pp. 168- 177 ,(1971) , 10.1021/AR50041A002
M. V. Encinas, E. A. Lissi, J. C. Scaiano, Photochemistry of aliphatic ketones in polar solvents The Journal of Physical Chemistry. ,vol. 84, pp. 948- 951 ,(1980) , 10.1021/J100446A003
M.V. Encina, E.A. Lissi, Type I—type II competition in the photolysis of aliphatic ketones Journal of Photochemistry. ,vol. 8, pp. 131- 143 ,(1978) , 10.1016/0047-2670(78)80015-X
L. Biczók, S. Förgeteg, T. Bérces, Intermolecular primary processes of triplet 2-pentanone with tributyl stannane and n-butyraldehyde Journal of Photochemistry. ,vol. 16, pp. 267- 278 ,(1981) , 10.1016/0047-2670(81)80049-4
S. Förgeteg, T. Bérces, The photolysis of n-butyraldehyde in isooctane at 313 nm International Journal of Chemical Kinetics. ,vol. 11, pp. 239- 260 ,(1979) , 10.1002/KIN.550110303
M.V. Encina, E.A. Lissi, Photochemistry of alkyl ketones bearing γ-hydrogens Journal of Photochemistry. ,vol. 6, pp. 173- 181 ,(1976) , 10.1016/0047-2670(76)85062-9