Fig. 1: The crystal structure of four Eu2+ complexes. | Nature Communications

Fig. 1: The crystal structure of four Eu2+ complexes.

From: Highly efficient and air-stable Eu(II)-containing azacryptates ready for organic light-emitting diodes

Fig. 1

ORTEP drawings of the crystal structures of (a) EuBr2–N4, (b) EuI2–N4, (c) EuBr2–N8, and (d) EuI2–N8, respectively. e The coordination polyhedrons (from top to bottom): square antiprism in EuX2–N4, distorted cube in EuX2–N4, distorted “hula-hoop” in EuBr2–N8 and EuI2–N8. The nitrogen atoms are labeled from N1–N8 for the data in Table 1. The solvent methanol (in EuBr2–N4 and EuI2–N8) and all the hydrogens are omitted for clarification. Atom notation: Eu (cyan), C (gray), N (blue), Br (brown), I (purple).

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