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One-photon related optical property characterizations of CA-Arg, CA-Ala, CA-Ser, and CA-Ser-Urea. (A) Absorption (dash line) and emission spectra under 365-, 405-, and 445-nm excitations. (B) Excitation-emission-intensity contour maps. (C) The CIE 1931 chromaticity diagrams with coordinates under different excitation wavelengths.
