Three bits eight states photochromic recording and nondestructive readout by using IR light |
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Authors: | Uchida Kingo Saito Masaaki Murakami Akinori Kobayashi Takao Nakamura Shinichiro Irie Masahiro |
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Affiliation: | Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu 520-2194, Japan. uchida@chem.ryukoku.ac.jp |
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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. |
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Keywords: | diarylethene multi‐ frequency recording nondestructive readout photochromism polymers |
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