Fig. 1: Crystal structures.

X-ray crystal structures of activated ZUL-220, ZUL-210, and ZUL-200 (Color code: F, teal; Nb, plain blue; C, gray; H, white; N, sky blue; S, yellow; O, red; Cu, blue).

X-ray crystal structures of activated ZUL-220, ZUL-210, and ZUL-200 (Color code: F, teal; Nb, plain blue; C, gray; H, white; N, sky blue; S, yellow; O, red; Cu, blue).