Fig. 6.
Spectral characterization of ligands 10, 11, 12, metallacycles 1, 2, 3, and bis-ammonium linker 4. (A) UV-vis absorption spectra of ligands 10, 11, 12, metallacycles 1, 2, 3, and bis-ammonium linker 4 in acetone (c = 10 µM). (B) Emission spectra of ligands 10, 11, 12, metallacycles 1, 2, 3, and bis-ammonium linker 4 in acetone (λex = 365 nm, c = 10 µM). (C) Emission spectra of equal molar 1 and 4 at different concentrations; (Inset) photograph of 1, 4, and mixture of equal molar 1 and 4 in acetone upon excitation at 365 nm using a UV lamp at 298 K (c = 29 µM). (D) CIE chromaticity coordinates of equal molar 1 and 4 at different concentrations, according to the fluorescence spectra recorded in C. (E) Emission spectra of equal molar 2 and 4 at different concentrations. (F) Emission spectra of equal molar 3 and 4 at different concentrations.