Through controlling the in-situ methoxyl addition that consequently switches the metal-chelation effect, a one-dimensional helical coordination polymer (1) and a chiral congeners (P-2 and M-2) were prepared, the 4(1) helice of opposite chirality in complex 1 are stacked alternately to form a racemate, while the 4(1) and 4(3) helices in the other are assembled homochirally by metal-chelation effect to generate a conglomerate, P-2 and M-2, respectively. (C) 2014 Elsevier B.V. All rights reserved.