Title

ESR observation of the H⋅⋅⋅H, H⋅⋅⋅D, and D⋅⋅⋅D spin-pair radicals in rare gas matrices

ACS Citation

Knight, L. B.; Rice, W. E.; Moore, L.; Davidson, E. R. ESR observation of the H⋅⋅⋅H, H⋅⋅⋅D, and D⋅⋅⋅D spin-pair radicals in rare gas matrices. J. Chem. Phys. 1995, 103, 5275-5275.

Abstract

The first experimental observation of the fundamentally important spin‐pair radicals, H...H, H...D, and D...D is reported. ESR(electron spin resonance) studies of rare gas matrices near 4 K containing extremely high concentrations of H and D atoms revealed the presence of these spin exchange‐coupled molecules whose ESRspectra are analyzed in terms of a 3Σ electronic ground state. The observed Dtensor (zero‐field splitting) for a specific isotopic spin pair was surprisingly constant in all four rare gases but showed large changes among the three isotopic species. As expected, the hyperfine splitting (A iso) for the spin‐pair was observed to be one‐half that of the free H or D atom.

Source Name

Journal of Chemical Physics

Publication Date

1-1-1995

Volume

103

Issue

13

Page(s)

287-295

Document Type

Citation

Citation Type

Article