Zusammenfassung
The emitting triplet state of Pt(4,6-dFppy)(acac) doped into n-octane is studied at cryogenic temperatures by site-selective high-resolution optical spectroscopy. The investigations reveal a very specific zero-field splitting (ZFS) pattern of the emitting T₁ state and the individual deactivation times of the substates to the singlet ground state S(0). Spin-lattice relaxation (SLR) processes ...
Zusammenfassung
The emitting triplet state of Pt(4,6-dFppy)(acac) doped into n-octane is studied at cryogenic temperatures by site-selective high-resolution optical spectroscopy. The investigations reveal a very specific zero-field splitting (ZFS) pattern of the emitting T₁ state and the individual deactivation times of the substates to the singlet ground state S(0). Spin-lattice relaxation (SLR) processes occurring between the T₁ substates are ascribed to a combination of the direct and the Raman process. Due to the relatively long SLR time at low temperature, a Boltzmann distribution is not established directly after the excitation pulse below ca. 2 K.
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