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Degradation of 4f was monitored by comparing the ratio of polymeric pyrene exiplex emission (λmax = 480 nm) to monomeric pyrene emission (λmax = 377 nm). λex = 250 nm, pH = 0.25 (3:1 THF:MeOH). Unfilled diamonds represent low emission ratios due to initial low polymer solubility; polymer completely dissolved in solution within 40 min.
