Skip to main content
. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: Synlett. 2016 Jun;27(9):1310–1317. doi: 10.1055/s-0035-1561363

Figure 6.

Figure 6

(a) EuII-containing aza-cryptate that has exciting bright yellow luminescence and (b) its crystal structure. Thermal ellipsoids are drawn at 50% probability. Hydrogen atoms, a non-coordinated Cl− counter ion, and a molecule of methanol are not shown for clarity. R-factor = 0.0543. Resolution = 0.54 Å. (c) Pictures of the complex (5.0 mM) in 4 mL cuvettes in a pH 12.0 solution of KOH (left) in ambient light and (right) under a hand held UV lamp (254–400 nm). The 26% quantum yield in aqueous solution is the highest reported value for EuII, with previous values below 1%. Adapted with permission from Kuda-Wedagedara, A. N. W.; Wang, C.; Martin, P. D.; Allen, M. J. J. Am. Chem. Soc. 2015, 4960. Copyright 2015 American Chemical Society