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1H NMR spectrum of AuNP-RGD-NIR-dye 8 in d6-DMSO: typical signals of peptide-bond-NH (7.50 ppm), Phe-CHarom (7.25–7.02 ppm), Arg-C=NH (6.65 ppm), Arg-NH2 (5.75 ppm), Phe-CH (5.39 ppm), Asp-CH (5.32 ppm), Arg-CH (4.56 ppm), Lys-CH (4.37 ppm), Gly-CH2 (4.02 ppm) and NIR-dye 8.08 (d, 2H, 6,6′-H), 8.05 (s, 2H, 4,4′-H), 7.96 (t, 2H, β,β’-H), 7.50 (m, 1H, δ-H), 7.3 (d, 2H, 7,7′-H), 6.65 (t, 2H, γ,γ’-H), 6.54 (d, 2H, α,α’-H), 4.09 (t, 4H, 2 × >NCH2) (compound 4a in [51]) can be found.
