We have prepared new chiral Schiff base complexes, and copper(Ⅱ) (2) to investigate steric effect of ligands for 1 and bis(N-R-l-phenylethyl-5- methoxysalicydenaminato) nickel(Ⅱ) (1) 2 and known bis(N-R-l...We have prepared new chiral Schiff base complexes, and copper(Ⅱ) (2) to investigate steric effect of ligands for 1 and bis(N-R-l-phenylethyl-5- methoxysalicydenaminato) nickel(Ⅱ) (1) 2 and known bis(N-R-l-phenylethyl-3,5-dichlorosalicydenaminato) nickel(Ⅱ) (3) and copper(Ⅱ) (4). By using two kinds of photochromic dyes, disperse red 1 (DRI) and azobenzene (AZ), we investigated the efficiency of increasing optical anisotropy of organic/inorganic hybrid materials of 1 through 4+AZ or DRI+PMMA in polymethylmethacrylate (PMMA) cast films by Weigert effect (and compared with cis-trans isomerization by alternate UV and visible light for 3 and 4 to previous study). Gradual increase of optical anisotropy was observed for all the hybrid materials regardless of flexibility of Schiff base complexes, and the degree of dichroism and weak intermolecular interactions were discussed based on polarized absorption electronic spectra.展开更多
文摘We have prepared new chiral Schiff base complexes, and copper(Ⅱ) (2) to investigate steric effect of ligands for 1 and bis(N-R-l-phenylethyl-5- methoxysalicydenaminato) nickel(Ⅱ) (1) 2 and known bis(N-R-l-phenylethyl-3,5-dichlorosalicydenaminato) nickel(Ⅱ) (3) and copper(Ⅱ) (4). By using two kinds of photochromic dyes, disperse red 1 (DRI) and azobenzene (AZ), we investigated the efficiency of increasing optical anisotropy of organic/inorganic hybrid materials of 1 through 4+AZ or DRI+PMMA in polymethylmethacrylate (PMMA) cast films by Weigert effect (and compared with cis-trans isomerization by alternate UV and visible light for 3 and 4 to previous study). Gradual increase of optical anisotropy was observed for all the hybrid materials regardless of flexibility of Schiff base complexes, and the degree of dichroism and weak intermolecular interactions were discussed based on polarized absorption electronic spectra.