Abstract
Less attention has been paid to the solvent-dependent chirality transformation behavior of coordination compounds when using achiral precursors. We have successfully prepared one known helical achiral compound (α-[AgL]n∙nH2O, 1) using water or DMSO as a solvent, one new helical homochiral MOF (β-[AgL]n∙nH2O, 2) using DMF, dimethyl acetamide or ethanol as a solvent, and one new non-helical achiral compound ([Ag2L(NO3)]n, 3) using n-propyl alchohol or cyclohexanol as a solvent, with the V-shaped achiral ligand 3-aminobenzoic acid (HL) as a ligand. Achiral 1 can be converted from chiral isomeric 2 through recrystallization in water. Such successive chirality transformation (achirality→chirality→achirality) behavior is probably proportional the polarity of the used solvent: cyclohexanol (3)<n-propyl alchohol (3)<ethanol (2)<dimethyl acetamide (2)<DMF (2)<DMSO (1)<water (1). A preliminary study revealed that the isomeric compounds 1 and 2 displayed significantly different photoluminescence.
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