Abstract
We have been studying the practical CO2-laser-induced13C separation by a two-stage IRMPD process. The IRMPD of natural CHClF2 in the presence of Br2 mainly produced CBr2F2, which was found to be highly enriched with13C. The yield and13C-atom fraction of CBr2F2 were examined as functions of pulse number, laser line, laser fluence, total pressure, and Br2 pressure using a CO2 TEA laser with an output less than 1 J pulse−1 in order to optimize experimental conditions for13C separation. For example, we obtained CBr2F2 at a13C concentration of 55% in the irradiation of the mixture of 100-Torr CHClF2 and 10-Torr Br2 with the laser radiation at a wavenumber of 1045.02 cm−1 and at a fluence of 3.4 J cm−2. The mechanism for the IRMPD is discussed on the basis of observed results. Using 8-J pulses, we were able to obtain 1.9×10−4 g of13C-enriched CBr2F2 (13C-atom fraction, 47%) per pulse under selected conditions. It is possible to produce 90% or higher13C by the second-stage IRMPD of the CBr2F2 in the presence of oxygen.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
V.S. Letokhov:Nonlinear Laser Chemistry (Springer, Berlin, Heidelberg 1983) p. 252
W. Fuss, W.E. Schmid: Ber. Bunsenges. Phys. Chem.83, 1148 (1979)
M. Gauthier, C.G. Cureton, P.A. Hackett, C. Willis: Appl. Phys. B28, 43 (1982)
G.I. Abdushelishvili, O.N. Avatkov, V.N. Bagratashvili, V.Yu. Baranov, A.B. Bakhtadze, E.P. Velikhov, V.M. Vetsko, I.G. Gverdtsitelii, V.S. Dolzhikov, G.G. Esadze, S.A. Kazakov, Yu.R. Kolomiiski, V.S. Letokhov, S.V. Pigul'skii, V.D. Pis'mennyi, E.A. Ryabov, G.I. Tkeshelashvili: Sov. J. Quant. Electron.12, 459 (1982)
H. Kojima, T. Fukumi, S. Nakajima, Y. Maruyama, K. Kosasa: Appl. Phys. B30, 143 (1983)
M. Gauthier, A. Outhouse, Y. Ishikawa, K.O. Kutschke, P.A. Hackett: Appl. Phys. B35, 173 (1984)
A. Outhouse, P. Lawrence, M. Gauthier, P.A. Hackett: Appl. Phys. B36, 63 (1985)
V.Yu. Baranov: IEEE J. QE-19, 1577 (1983)
A.V. Evseev, V.S. Letokhov, A.A. Puretzky: Appl. Phys. B36, 93 (1985)
M. Drouin, M. Gauthier, R. Pilon, P.A. Hackett, C. Willis: Chem. Phys. Lett.60, 16 (1978)
T. Watanabe, T. Oyama, O. Hayashi, Y. Ishikawa, T. Ishii, S. Arai: Nippon Kagaku Kaishi, 1517 (1984)
S. Bittenson, P.L. Houston: J. Chem. Phys.67, 4819 (1977)
H. Kojima, T. Fukumi, S. Nakajima, Y. Maruyama, K. Kosasa: Chem. Phys. Lett.95, 614 (1983)
S. Arai, T. Watanabe, Y. Ishikawa, T. Oyama, O. Hayashi, T. Ishii: Chem. Phys. Lett.112, 224 (1984)
P. Ma, K. Sugita, S. Arai: Chem. Phys. Lett.137, 590 (1987)
S. Arai, K. Sugita, P. Ma, Y. Ishikawa, H. Kaetsu, S. Isomura: Chem. Phys. Lett.151, 516 (1988)
J.G. McLaughlin, M. Poliakoff, J.J. Turner: J. Mol. Struc.82, 51 (1982)
E. Grunwald, K.J. Olszyna, D.F. Dever, B. Knishkowy: J. Am. Chem. Soc.99, 6515 (1977)
C.E. Decker, F.F. Cleveland, R.B. Bernstein: J. Chem. Phys.21, 189 (1953)
C.E. Decker, A.G. Meister, F.F. Cleveland, R.B. Bernstein: J. Chem. Phys.21, 1781 (1953)
Aa.S. Sudbø, P.A. Schulz, Y.R. Shen, Y.T. Lee: J. Chem. Phys.69, 2312 (1978)
S. Popok, C.M. Lonzetta, E. Grunwald: J. Org. Chem.44, 2377 (1979)
D.S.Y. Hsu, M.E. Umstead, M.C. Lin: ACS Symp. Ser.66, 128 (1978)
J.W. Edwards, P.A. Small: Nature4939, 1329, June 27, 1964
G.R. Barnes, R.A. Cox, R.F. Simmons. J. Chem. Soc. (B) 1176 (1971)
F.W. Dalby: J. Chem. Phys.41, 2297 (1964)
W.J.R. Tyerman: Trans. Faraday Soc.65, 1188 (1969)
K. Sugawara, T. Nakanaga, H. Takeo, C. Matsumura: Chem. Phys. Lett.134, 347 (1987)
J.C. Stephenson, D.S. King: J. Chem. Phys.69, 1485 (1978)
R.E. Kagarise, L.W. Daasch: J. Chem. Phys.23, 130 (1955)
J.J. Ritter: J. Am. Chem. Soc.100, 2441 (1978)
J.J. Ritter, S.M. Freund: J.C.S. Chem. Commun. 811 (1976)
W.S. Nip, P.A. Hackett, C. Willis: Can. J. Chem.59, 2703 (1981)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Arai, S., Sugita, K., Ma, P. et al. First-stage enrichment in CO2-laser-induced13C separation by a two-stage IRMPD process: IRMPD of CHClF2/Br2 mixtures. Appl. Phys. B 48, 427–435 (1989). https://doi.org/10.1007/BF00694544
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00694544