A novel chiral Salen ligand with a glucose moiety was synthesized from the condensation of 1,2:5,6-di-O-isopropylidene-3-O-methylene-5-(3-tert-butyl-2-hydroxy benzaldehyde) -α-D-glucofuranose with (1R,2R)-1,2-diamino...A novel chiral Salen ligand with a glucose moiety was synthesized from the condensation of 1,2:5,6-di-O-isopropylidene-3-O-methylene-5-(3-tert-butyl-2-hydroxy benzaldehyde) -α-D-glucofuranose with (1R,2R)-1,2-diaminocyclohexane. Several chiral complexes of Mn3+, Fe3+, Co2+ and Cu2+ were prepared from this ligand. Both the ligand and the complexes were characterized by elemental analysis, NMR, IR, MS, and UV-Vis.展开更多
Simulated UV-vis and CD （circular dichroism） spectra were obtained for several chiral Schiff base Ni（II）, Cu（II） and Zn（II） complexes by TD-DFT （time dependent-density functional theory）and Z1NDO calculation...Simulated UV-vis and CD （circular dichroism） spectra were obtained for several chiral Schiff base Ni（II）, Cu（II） and Zn（II） complexes by TD-DFT （time dependent-density functional theory）and Z1NDO calculations. Dipole moments for them were also evaluated by ZINDO calculations and revealed that Cu（II） complexes exhibited the largest values than the analogous Ni（II） and Zn（II） complexes. Although these complexes possessed large dipole moments, induced CD by these complexes were observed a Cu（II）-containing metallodendrimer nor Cu-nanoclusters prepared in a PAMAM （polyamidoamine） dendrimer experimentally nevertheless of other related chiral Schiff base Ni（II）, Cu（II）, and Zn（II） complexes. The present results suggested that steric factors of ligands were more important than electronic factors for emerging induced CD bands by supramolecular interactions.展开更多
文摘A novel chiral Salen ligand with a glucose moiety was synthesized from the condensation of 1,2:5,6-di-O-isopropylidene-3-O-methylene-5-(3-tert-butyl-2-hydroxy benzaldehyde) -α-D-glucofuranose with (1R,2R)-1,2-diaminocyclohexane. Several chiral complexes of Mn3+, Fe3+, Co2+ and Cu2+ were prepared from this ligand. Both the ligand and the complexes were characterized by elemental analysis, NMR, IR, MS, and UV-Vis.
文摘Simulated UV-vis and CD （circular dichroism） spectra were obtained for several chiral Schiff base Ni（II）, Cu（II） and Zn（II） complexes by TD-DFT （time dependent-density functional theory）and Z1NDO calculations. Dipole moments for them were also evaluated by ZINDO calculations and revealed that Cu（II） complexes exhibited the largest values than the analogous Ni（II） and Zn（II） complexes. Although these complexes possessed large dipole moments, induced CD by these complexes were observed a Cu（II）-containing metallodendrimer nor Cu-nanoclusters prepared in a PAMAM （polyamidoamine） dendrimer experimentally nevertheless of other related chiral Schiff base Ni（II）, Cu（II）, and Zn（II） complexes. The present results suggested that steric factors of ligands were more important than electronic factors for emerging induced CD bands by supramolecular interactions.
