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1H NMR (400 MHz, D2O + NaOD, pD = 10) of (a) indole-diphenylalanine 1 sol and (b) carbazole-diphenylalanine 2 sol (b) with the corresponding AFM of (c) indole-diphenylalanine 1 sol at 0.1% (w/v) and (d) carbazole-diphenylalanine 2 sol at 0.01% (w/v). Scale bars represent 300 nm.
