From achiral ligands to chiral coordination polymers: spontaneous resolution, weak ferromagnetism, and topological ferrimagnetism.

摘要: Using the achiral diazine ligands bearing two bidentate pyridylimino groups as sources of conformational chirality, five azido-bridged coordination polymers are prepared and characterized crystallographically magnetically. The chirality molecular units is induced by in a twisted chiral conformation. use L1 (1,4-bis(2-pyridyl)-1-amino-2,3-diaza-1,3-butadiene) L2 (1,4-bis(2-pyridyl)-1,4-diamino-2,3-diaza-1,3-butadiene) induces spontaneous resolution, yielding conglomerates compounds [Mn3(L1)2(N3)6]n (1) [Mn2(L2)2(N3)3]n(ClO4)n·nH2O (2), respectively, where triangular or double helical (2) connected into homochiral one-dimensional (1D) chains via single end-to-end (EE) azido bridges. stacked hydrogen bonds fashion to yield crystals. When L3 (2,5-bis(2-pyridyl)-3,4-diaza-2,4-hexadiene) employed, partial resolution occurs, binuclear i...