title: Rewritable optical memory in liquid crystals containing photo-epimerizing Cr(III) complexes.
abstract: We describe herein a concept of optical memory using a photosensitive metal complex, [Cr((-)-tfac)3] ((-)-tfac = (-)-3-trifluoroacetylcamphorato), as a dopant to induce chiral nematic phases. The memory was written by the photo-epimerization of the complex and read-out in terms of circular dichroism spectra. The rewritability of the memory was attempted by using the cycles between liquid crystals and isotropic phases.
authors.affiliation: Department of Chemistry, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan. sato.hisako.my@ehime-u.ac.jp
authors.forename: Hisako
authors.initials: H
authors.lastname: Sato
authors.forename: Fumi
authors.initials: F
authors.lastname: Sato
authors.forename: Akihiko
authors.initials: A
authors.lastname: Yamagishi
mesh_terms: D002857:Chromium / Q000737:chemistry* / Q000528:radiation effects; D002942:Circular Dichroism; D056831:Coordination Complexes / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D050866:Liquid Crystals / Q000737:chemistry* / Q000528:radiation effects; D055620:Optical Phenomena
chemical_list: D056831:Coordination Complexes; D002857:Chromium