Browsing by Author "Dinse, Klaus Peter"

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    Electron spin echo determination of spin diffusion in the one-dimensional conductor (fluoranthenyl)2+(PF6)x-(SbF6)1-x-(x ≈ 0.5)
    (1983) Sigg, Jakob; Prisner, Thomas; Dinse, Klaus Peter; Brunner, Hermann; Schweitzer, Dieter; Hausser, Karl H.
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    Electron spin echo experiments on the quasi one dimensional organic metal: (perylene)2X1·2/3THF (X = AsF6-, PF6-)
    (1985) Meenenga, Dirk; Dinse, Klaus Peter; Schweitzer, Dieter; Keller, Heimo J.
    The analysis of the electron spin echo decay function shows an exceptionally good quasi one dimensional behaviour for the electron spin diffusion.
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    Electron-spin-echo experiments on the one-dimensional conductor [(fluoranthene)2]+[(PF6)x(SbF6)1-x]- (x≈0.5)
    (1983) Sigg, Jakob; Prisner, Thomas; Dinse, Klaus Peter; Brunner, Hermann; Schweitzer, Dieter; Hausser, Karl H.
    The electron-spin-echo decay function was determined for the conducting phase of [(C16H10)2]+X- in the temperature range 183-300 K. The decay function exhibited an exp[-(γt)3/2] dependence, characteristic of one-dimensional spin diffusion. The ratio 5×106≤D∥/D⊥≤5×108 for the inner-stack-to-out-of-stack diffusion rates was determined from the characteristic time t0, at which the electron-spin-echo decay function changed to the "conventional" exp(-2γ′τ)) form. The deduced value 2×1013≤D∥≤2×1016 rad/s is consistent with the bulk dc conductivity and with recently determined nuclear spin-lattice relaxation rates. The overall assumption of highly mobile electronic spins was confirmed by an Overhauser-type experiment.
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    Influence of an identified dimer vibration on the emission spectrum of [2,2]paracyclophane
    (1980) Goldacker, Wilfried; Schweitzer, Dieter; Dinse, Klaus Peter; Hausser, Karl H.
    The emission spectrum of polycrystalline [2,2]paracylophane shows a resolved vibronic structure with a 241 cm−1 progression at He temperatures. The dependence of the energy of this mode upon selective deuteration in combination with results from FIR and Raman spectra could be used to identify the mode as a torsional dimer vibration. The emission spectra could be simulated assuming a linear coupling of the torsional mode to the electronic transitions with coupling strengths of S = 10 (fluorescence) and S = 13 (phosphorescence). This corresponds to an equilibrium displacement of the benzene rings under electronic excitation by a torsional angle of 10.6° (S1) and 12.1° (T1), in addition to the small torsion in the ground state S0 by about 3°.
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    Pulsed ESR investigation of spin transport properties in the organic conductor (perylenyl)2(AsF6)0.75(PF6)0.35 · 0.85CH2Cl2
    (1987) Dobbert, Olaf; Prisner, Thomas; Dinse, Klaus Peter; Schweitzer, Dieter; Keller, Heimo J.
    Spin transport properties in the organic conductor (perylenyl2)+ X- were studies in the temperature range of 4-300 K. Being constant in the "metallic" range (Dmid = 1.8(2)cm2s-1, the diffusion constant Dmid exhibits a temperature activated behaviour in the low temperature range, at variance with the prediction invoking the model of an intrinsic semiconductor. A low-temperature divergence of the homogenous ESR line width, indicative of one-dimensional fluctuations, was also observed.
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    ZFS-tensor of the triplet states of [2.2]phanes as studied by ESR
    (1981) Bär, Monika; Dinse, Klaus Peter; Goldacker, Wilfried; Hausser, Karl H.; Schweitzer, Dieter; Zimmermann, Herbert; Krieger, Claus
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