Laser separation of oxygen isotopes by infrared multiphoton dissociation of CF₃CH₂OH

18O-Selective Infrared Multiple Photon Decomposition of Natural and 18O-Enriched Diisopropyl Ethers

“…The intense band in ethers around 1000 cm -1 is ascribed to the antisymmetric stretching vibration of the C−O−C bond and expected to have a large oxygen isotope shift, although the shift has not been well-established in experiment. On the other hand, CO 2 laser-induced IRMPD of several ethers has been found to show large isotope effects between these oxygen isotopes. − The fact is suggestive of the large shift of the band around 1000 cm -1 . Previously, we have obtained very high selectivity on 18 O in the IRMPD of natural diisopropyl ether under selected irradiation conditions .…”

“…On the other hand, CO 2 laser-induced IRMPD of several ethers has been found to show large isotope effects between these oxygen isotopes. [12][13][14][15][16][17][18] The fact is suggestive of the large shift of the band around 1000 cm -1 . Previously, we have obtained very high selectivity on 18 O in the IRMPD of natural diisopropyl ether under selected irradiation conditions.…”