Abstract
The nature of the excited states of polysilylenes has attracted considerable attention. Fairly intense fluorescence is observed at around 350 nm, and on the basis of the narrow spectral width of the fluorescence, the concept of a high degree of delocalization of the {sup 1}({sigma},{sigma}*) excited state of the polymers has been widely accepted. Most previous studies on the excited states of polysilylenes are, however, limited to singlet states. Observation of the phosphorescence is scarce, except for polymers having aromatic pendants, and the character of the triplet excited states of polysilylenes is not well elucidated. The authors have investigated the long-lived emission of (MePrSi){sub n} at 4.2 K or below, and in this communication, the authors report the existence of the new phosphorescence which should be attributed to the emission from the delocalized triplet state.
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