Synthesis, Characterization And Property Studies Of Novel Chiral Supramolecular Complexes Constructed By Outer-sphere Coordination

In this thesis, we designed and synthetized the C3-symmetrical tripodal ligand (L =1,3,5-tris [phenyl-aminomethyl]-2,4,6-trimethylbenzene) based on the concept of outer-sphere coordination and supramolecular synthons. Protonated ligand L as second ligand,were connected with metal complex anions through second-sphere coordinations, constructing a series of supramolecular complexes. These complexes structures were characterized by infrared spectroscopy (IR), H-nuclear magnetic resonance(1H-NMR), X-ray powder diffraction (XRD), thermo gravimetric analysis (TGA) and circular dichroism spectrums (CD).Chiral P213 space group supramolecular compounds [L]3H+·[MCl4]2-·Cl-(M= Cd, Zn, Mn, Co) (crystal 1-4) and [L]3H+-[ZnBr4]2-·Br-(crystal 5) were prepared by traditional evaporation method. We have constructed the chiral supramolecular complexes. These crystal molecules were different in crystal lattices and crystal frameworks after comparing second ligand with these compounds. Solid circular dichroism spectrums (CD) showed an absorption in the wavelength of 280 nm, which indicated a positive cotton effect and revealed the crystal had a single chiral.Furthermore, P-1 space groups achiral supramolecular compounds [L]3H+ [MCl4]2-·Cl-·H2O (M= Cd, Cu) (crystal 6-7) were prepared by solid-state grinding method. By comparing P-XRD spectrums, we studied the transformation from achiral compounds to chiral compounds and analyzed the role of water in this transformation.We prepared P213 chiral space group compounds and P-1 achiral space group compounds by solution evaporation method and solid-state grinding methods. These two methods relatively complemented each other, which has afforded us new thoughts and methods to prepare chiral and achiral compounds.