Abstract
The relaxation time, T 1ρ, for 35Cl in perchlorate ion in aqueous solutions is found to be 0·25 s. T 1ρ is insensitive to the presence of most first row transition metals; however, a weak complex with manganous ion is demonstrated, and the perchlorate ion-manganous exchange rate is shown to be between 3 × 104 s-1 and 3·6 × 107 s-1. In the absence of manganous ion, the relaxation is dominated by the nuclear electric quadrupole interaction; however, a dipolar contribution is observed with manganous ion present.
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