ESR investigations of H2O+, HDO+, D2O+, and H217O+ isolated in neon matrices at 4 K.
Knight, L. B. ESR investigations of H2O+, HDO+, D2O+, and H217O+ isolated in neon matrices at 4 K. J. Chem. Phys. 1983, 78, 5940-5940.
The H2â€‰ 1 6O+, HDâ€‰1 6O+, D2â€‰ 1 6O+, and H2â€‰ 1 7O+ ion radicals have been generated by photoionization, trapped in neon matrices at 4 K, and investigated by ESR(electron spin resonance)spectroscopy. The magnetic parameters are g iso=2.0093(3), A iso(H)=73.7(6) MHz, and A iso(1 7O)=83.5(6) MHz. A weak electronic absorption feature at 6036(3) Ã… was observed which is tentatively assigned to a known gas phase band. The H2O+ radical appears to be rotating in neon and exhibits an unusual intensity increase as the matrix temperature is lowered from 9 to 4 K. Comparisons between H2O+ and the isoelectronic radicals NH2, NH+ 3, and CH3 are made.
Journal of Chemical Physics