A chiral helical Mn(II) MOF showing unusual utg topology based on d-saccharic acid

A chiral helical MOF [Mn2(sac)2(H2O)2]·3.3H2O (H2sac = d-saccharic acid) (1) has been synthesized and characterized. MOF 1 crystallizes in orthorhombic system with space group P212121, and the structure contains right-handed 21 helical chains in three directions with hydrophilic channels. From the topological point of view, the framework of MOF 1 can be abstracted as an unusual binodal 3-connected network with utg topology. The electrochemical property has been studied, undergoing two one-electron redox processes.