title: Three bits eight states photochromic recording and nondestructive readout by using IR light.
abstract: A photochromic polymer film containing three different diarylethene derivatives, that is, 1,2-bis(3,5-dimethyl-2-thienyl)perfluorocyclopentene (1), 1,2-bis(2,5-dimethyl-3-thienyl)perfluorocyclopentene (2), and 1,2-bis(2-methyl-5-phenyl-3-thienyl)perfluorocyclopentene (3) was prepared. Upon UV irradiation, the three derivatives changed to their closed-ring isomers having different colors, yellow, red, and blue. They showed different spectra not only in UV/Vis region but also in the IR spectral region. Upon irradiation with visible light of appropriate wavelengths, each closed-ring isomer was selectively bleached, and three bits eight states recording was performed. The eight states could be read out nondestructively by using IR light of appropriate wavenumbers.
authors.affiliation: Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu 520-2194, Japan. uchida@chem.ryukoku.ac.jp
authors.forename: Kingo
authors.initials: K
authors.lastname: Uchida
authors.forename: Masaaki
authors.initials: M
authors.lastname: Saito
authors.forename: Akinori
authors.initials: A
authors.lastname: Murakami
authors.forename: Takao
authors.initials: T
authors.lastname: Kobayashi
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Nakamura
authors.forename: Masahiro
authors.initials: M
authors.lastname: Irie