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Optimized geometries (DFT B3LYP, 6-31G(d,p)) of the telomestatin—cation complexes (side view) for (a) NH4 +, (b) K+, and (c) Na+, and optimized geometries of the telomestatin—cation—G-quartet complexes (top view and side view) for (d) NH4 +, (e) K+, and (f) Na+. Telomestatin is shown in yellow, the cation is shown in purple, and the G-quartet is colored by elements.
