Spontaneous Resolution in the Ionothermal Synthesis of Homochiral Zn(II) Metal–Organic Frameworks with (10,3)-a Topology Constructed from Achiral 5-Sulfoisophthalate

Two homochiral enantiomers {(EMIM)[Zn(SIP)(IM)]}_n (1a and 1b, EMIM = 1-ethyl-3-methylimidazolium) possessing chiral (10,3)-a topology constructed from an achiral rigid 5-sulfoisophthalate (SIP) ligand and imidazole (IM) have been obtained by spontaneous resolution under ionothermal conditions. The homochiral enantiomers show second-order nonlinear optical effects and photoluminescence.