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UV-Vis absorbance (A,B,C) and emission (A1,B1,C1) spectra of the TSPO ligand (A,A1, molecular sketch in panel A2), TSPO ligand-conjugated SN22 (B,B1, sketch of the multifunctional NP in panel B2) and SN46 (C,C1, sketch of the multifunctional NP in panel C2).
