Abstract
The low-temperature steady-state phosphorescence spectrum of poly(di-n-hexylsilane) (PDHS) in a 3-methylpentane (3MP) glass at 1.5 K has been measured. The temperature dependence of the phosphorescence decay was determined and zero-field optically detected magnetic resonance (ODMR) experiments were performed. Evidence of at least two distinct emitting species was found. A narrow phosphorescence spectrum with no distinct vibronic structure was observed for PDHS and interpreted as indicating a delocalized triplet state. The ODMR spectrum is dependent on the detection wavelength, indicating that the triplet splittings are sensitive to the conformation and local environment of the polysilane chains. The phosphorescence disappears completely above 30 K. This is attributed to the presence of a dissociative triplet state.
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Walsh, C., Ambrose, W.P., Burland, D.M. et al. Phosphorescence emission from poly(di-n-hexylsilane) in a glass: Temperature dependence and optically detected magnetic resonance (ODMR) spectra. J Inorg Organomet Polym 2, 285–295 (1992). https://doi.org/10.1007/BF00777247
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DOI: https://doi.org/10.1007/BF00777247