One-dimensional (1D) helical and 2D homochiral metal–organic frameworks built from a new chiral octahydrobinaphthalene-derived dicarboxylic acid

Abstract

Three homochiral metal–organic frameworks ( MOFs) based on enantiopure chiral ligand: (R)-2,2’-dimethoxy-5,5′,6,6′,7,7′,8,8′-octahydro-1,1′-binaphthyl-3,3′-dicarboxylic acid ( H 2L ), namely Cd( L)(Py) 3 1, Cu( L)(Py) 3 2, Na[Cd( L)( LH)] · 2.5H 2O 3 (Py = pyridine), were firstly synthesized, under solvothermal reactions. X-ray single-crystal diffraction studies reveal that 1 and 2 adopt one-dimensional (1D) infinite helical structures, while 3 possesses 2D chiral framework structure adopting ABAB offset stacking modes along the a-axis. Thermogravimetric analyses ( TGA) display that 3 is thermally stable to 330 °C which is rare for homochiral MOFs.