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Three Bits Eight States Photochromic Recording and Nondestructive Readout by Using IR Light
Author(s) -
Uchida Kingo,
Saito Masaaki,
Murakami Akinori,
Kobayashi Takao,
Nakamura Shinichiro,
Irie Masahiro
Publication year - 2005
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200400575
Subject(s) - photochromism , diarylethene , irradiation , photochemistry , wavelength , visible spectrum , materials science , ring (chemistry) , infrared , optoelectronics , optics , chemistry , physics , organic chemistry , nuclear physics
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.