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Phosphorescence emission spectra of (a) [Pt(L1 )(acac)], (b) [Pt(L2 )(acac)], (c) [Pt(L3 )(acac)], (d) [Pt(L4 )(acac)] and (e) [Pt(L5 )(acac)] in different aerated solvents. Optically matched solutions were used (all the solution show the same absorbance at the excitation wavelength, λ ex=440 nm, A 440 nm=0.1, 25 °C).
