GPC data indicated a weight average molecular weight (Mw) of 3900 g/mol and a polydispersity (Đ) of 1.91 when calibrated against polystyrene standards (Fig. ). FTIR spectra of the polymer showed broadened peaks compared to monomer 4 (Fig. ) and Raman spectroscopy revealed fluorescence when analyzed with either a 532 nm laser (Fig. ) or a 785 nm laser (S45). This fluorescence is consistent with previous reports of dicyclopentadiene-sulfur copolymers, which makes it difficult to draw conclusions from the Raman spectra with regards to sulfur rank. With that said, subtle differences in the S-S signals of the Raman spectra could be resolved for linear disulfide and trisulfide small molecule models and the cyclic trisulfide and pentasulfide monomers (S18). This important series of control experiments indicate the possibility for distinguishing sulfur ranks by Raman spectroscopy, in line with a recent report by Dodd, Hasell and co-workers. Furthermore, reduction of the polymer with LiAlH4 produced dithiol 5, corroborating the proposed polymer structure (Fig. ).