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- W1982202325 abstract "The longitudinal relaxation rates of the protons and the fluorine were determined for the radical cation salt (fluoranthenyl)2+PF6− as a function of the temperature. These data are compared with the temperature dependence of the pulsed ESR signal amplitude at the same Larmor frequency (44 MHz). Whereas the fluorines are relaxed mainly by the reorientational motion of the anions and by the interaction with fixed paramagnetic impurities, the protons are relaxed additionally above 150 K predominantly by highly mobile paramagnetic species, whose concentration could be determined directly via the signal amplitudes of the NMR and ESR signals in the same set up. The Pauli susceptibility χcs = 3.1 ×10−5 cm3/mole which is derived from this experiment and the Korringa relation (T1H4−)−1 = constant of the proton relaxation leads to the assumption of a metal-like behavior of the salt above 183 K. The observation that the protons of the cation stacks, rather than the fluorines on the anions are relaxed by the mobile paramagnetic species favors the assumption of one-dimensional spin transport within the fluoranthenyl stacks, which is further supported by an ω−12 dependence of T1H−1." @default.
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- W1982202325 date "1982-12-01" @default.
- W1982202325 modified "2023-09-26" @default.
- W1982202325 title "Magnetic resonance experiments on the radical cation salt (fluoranthenyl)2+ PF6−. Correlation of proton-NMR, fluorine-NMR and ESR" @default.
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- W1982202325 doi "https://doi.org/10.1016/0301-0104(82)85166-5" @default.
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