Selective Dissociation of C4F9 COI Molecules by the Second-Harmonic Radiation of Pulsed TEA CO2 Laser. Issue 3 (1992)

• Record Type: Journal Article
• Authors: Bildinov, I. K.; Laptev, V. B.; Ryabov, E. A.; Tumanova, L. M.
• Is Part Of: Laser chemistry. Volume 12:Issue 3/4(1992)
• Page Start: 173
• Page End: 180
• Publication Date: 1992
• Subjects: Lasers in chemistry -- Periodicals; 542.8
• DOI: 10.1155/LC.12.173
• Languages: English
• ISSNs: 0278-6273

Abstract

Abstract : IR multiphoton dissociation of C4 F9 COI was studied by the second-harmonic radiation of TEA CO2 laser. The stretching vibration of the carbonyl bondν C = O was excited. The second harmonic of CO2 laser was generated with the use of nonlinear crystal AgGaSe2 . The maximum energy fluence at focus was Φ ≃ 1.2 J/cm 2 . The MPD of C4 F9 COI was proved to be effective and selective with respect to oxygen and carbon isotopes. The main dissociation products were C4 F9 I and CO. The dissociation product, CO, was enriched with both 16 O and 12 C when the C4 F9 COI molecule was excited at the center of the bandν C = O by the laser line 10P (18) with 2 ω las = 1797.2 cm −1 . The maximum selectivities measured for oxygen and carbon wereα (16/18) = 20 andα (12/13) = 25 respectively.