Synthesis of chiral porous coordination polymer that shows structural transformation induced by guest molecules

Abstract

We report the synthesis of a new chiral porous coordination polymer [Zn2{(R)-5,5′-BDA}2(dabco)]n·DMF (5,5′-BDA=2,2′-dihydroxy-1,1′-binaphthalene-5,5′-dicarboxylic acid, dabco=1,4-diazabicyclo[2.2.2]octane). This compound had one-dimensional (1D) channels which were occupied by DMF molecules. The hydroxyl groups on the surface of the channels acted as DMF interactive sites. Removal of DMF from the pores resulted in an amorphous solid. However, the apohost underwent a structural (amorphous-to-crystalline) transformation in response to the addition of guest molecules with amide groups. Interestingly, the observed degree of crystallinity was different for chiral amides, depending on the stereoisomer used.