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. Author manuscript; available in PMC: 2020 Mar 11.

Published in final edited form as: Inorg Chem. 2020 Feb 13;59(5):3193–3199. doi: 10.1021/acs.inorgchem.9b03561

Figure 2. — A) 1PA excitation (black lines, left) and emission spectra (red lines, right) of Eu^III complexes (λ_exc = 380 nm). B) 2PA emission spectra of Eu^III complexes. C) Plot of the log of the emission intensity I at 615 nm upon 2PA excitation as a function of the log of the laser power P. From top to bottom in each figure (a) K₃[Eu(CPAD)₃] in DMSO, (b) K[Eu(CPAP)(DMSO)₂] in DMSO, and (c) K[Eu(CPAP)(H₂O)₂] in TRIS/HCl buffered aqueous system (pH ~7.4, 10% DMSO); λ_exc = 720 nm; [complex] = 1x10⁻⁴ M.

Figure 2. — A) 1PA excitation (black lines, left) and emission spectra (red lines, right) of Eu^III complexes (λ_exc = 380 nm). B) 2PA emission spectra of Eu^III complexes. C) Plot of the log of the emission intensity I at 615 nm upon 2PA excitation as a function of the log of the laser power P. From top to bottom in each figure (a) K₃[Eu(CPAD)₃] in DMSO, (b) K[Eu(CPAP)(DMSO)₂] in DMSO, and (c) K[Eu(CPAP)(H₂O)₂] in TRIS/HCl buffered aqueous system (pH ~7.4, 10% DMSO); λ_exc = 720 nm; [complex] = 1x10⁻⁴ M.