Zusammenfassung
The title compound doped into host matrix of single-crystal [Ru(bpy-h₈)₃](ClO₄)₂ exhibits highly resolved emission spectra at low temperatures. The electronic origins of the three lowest excited states lying at 14201 ± 1 cm⁻¹ (line I), 14261 ± 1 cm⁻¹ (line II), and 14415 ± 3 cm⁻¹ (line III) are determined. Further, a large number of vibronic components are identified. The radiative decay paths ...
Zusammenfassung
The title compound doped into host matrix of single-crystal [Ru(bpy-h₈)₃](ClO₄)₂ exhibits highly resolved emission spectra at low temperatures. The electronic origins of the three lowest excited states lying at 14201 ± 1 cm⁻¹ (line I), 14261 ± 1 cm⁻¹ (line II), and 14415 ± 3 cm⁻¹ (line III) are determined. Further, a large number of vibronic components are identified. The radiative decay paths from the two lowest excited states are found to be different. We observe a more pronounced coupling of IR-active modes for the radiative decay from |I) compared to the decay from |II) which couples to resonance-enhanced Raman vibrations. Application of high magnetic fields allows the tuning of the vibronic coupling properties of state |I). Moreover, a detailed comparison of the spectroscopic properties of the deuterated complexes with those of the protonated ones is presented. Each of the three lowest excited states exhibits a relatively small blue-shift of ca. 32 cm⁻¹ upon deuteration. This implies that there are only small, unimportant differences of the vibrational energies of these excited states compared to those of the electronic ground state.