The trinity of polyoxometalates: connecting {M12} Keggin and {M18} Dawson clusters to triangles.

Two topologically equivalent triangular POM aggregates based upon the Keggin () and Dawson () cluster species, with distinctive double {W-O-M} intra-molecular linkages involving Mn(III) and Co(III) ions are presented; both these compounds demonstrate electrocatalytic activity.

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