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. 2019 Feb 14;24(4):688. doi: 10.3390/molecules24040688

Figure 3.

Figure 3

Fluorescence spectra of two metal-free porphyrins THPP (a) and TCPP (b), with different concentrations of GO red—20 mg/L, green—40 mg/L, blue—60 mg/L, cyan—80 mg/L.