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

Add time:09/09/2019    Source:sciencedirect.com

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 (H2L), namely Cd(L)(Py)3 1, Cu(L)(Py)3 2, Na[Cd(L)(LH)] · 2.5H2O 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.

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