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In the title organic salt, C 18 H 14 N 3 O + ·ClO 4− ·CH 4 O, there is a π–π stacking inter­action between neighbouring 1,10-phenanthroline rings and the relevant distances are 3.5453 (18) Å for the centroid–centroid distance and 3.354 Å for the perpendicular distance. There is also a relatively close contact between a C—H bond and a symmetry-related pyridine ring. There are classical N—H⋯O and O—H⋯N hydrogen bonds and non-classical C—H⋯O hydrogen bonds involving the cation, methanol solvent mol­ecule and perchlorate anion.

9-(2-Pyridylmethoxy)-1,10-phenanthrolin-1-ium perchlorate methanol solvate