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. 2018 Jul 19;140(32):10344–10353. doi: 10.1021/jacs.8b06195

Figure 5.

Figure 5

(a) Self-assembly of A around CuI in (S)-EL. Shorter oligomers were observed when more p-toluidine initiator (E) was added. (b) CD spectra of polymer 1 prepared in R vs S EL. Redissolving 1 that had been formed in MeCN in (S)-EL did not give rise to CD bands. (c) The gabs of polymer 1 incorporating only monomer A (no added E) correlated linearly with the ee of the EL solvent. The relative ee was calculated inferring that gabs = 2.54 × 10–3 corresponds to enantiopure 1 (see below). (d) Plots showing the increase of gabs with the ratio of monomer A to achiral initiating group E, with polymerization carried out in EL of different ee. The data were fitted to eq 2 using r = 0.141, and largest observed gabs values of 0.89 × 10–3, 0.32 × 10–3, and 0.10 × 10–3 were obtained in 100%, 40%, and 15% ee (S)-EL, respectively.