Controlled generation of heterochiral or homochiral coordination polymer: helical conformational polymorphs and argentophilicityinduced spontaneous resolution

In the pair of helical conformational polymorphs of the coordination polymer {[AgL](CF3SO3)}(infinity)(L = 2-pyridinyl-3pyridinylmethanone), the 21 helices of opposite chirality in one supramolecular isomer are stacked alternately to form a racemate, while the 41 helices in the other are assembled homochirally by inter-chain argentophilic interaction to generate a conglomerate.