Photochromism of chromene crystals; a new property of old chromenes

Jonathan Hobley; Vincenzo Malatesta; Roberto Millini; William Giroldini; Lucia Wis; Masahiro Goto; Maki Kishimoto; H. Fukumura

doi:10.1039/B003480K

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Photochromism of chromene crystals; a new property of old chromenesMicroscopic colour images showing photo-colouration and bleaching are available as electronic supplementary information (ESI). Microscopic images were obtained with a Nikon Eclipse E800 Fluorescence microscope using the microscope’s Hg lamp excitation source to photo-convert the crystals. See http://www.rsc.org/suppdata/cc/b0/b003480k/

Jonathan Hobley,*^a Vincenzo Malatesta,*^b Roberto Millini,^c William Giroldini,^b Lucia Wis,^b Masahiro Goto,^a Maki Kishimoto^a and H. Fukumura^d

Author affiliations

* Corresponding authors

^a Advanced Science Research Centre, Japan Atomic Energy Research Institute, 25-1, Mii-Minami-Machi, Neyagawa, Japan.
E-mail: j.hobley@apr.jaeri.go.jp
Fax: Fax: +81 728 31 0596;
Tel: Tel: +81 728 31 0943;

^b Great Lakes Technology, Via Maritano 26, San Donato Milanese, Italy

^c Enitecnologie, Via Maritano 26, San Donato Milanese, Italy

^d Department of Chemistry, School of Science, Tohoku University, Sendai, Japan

Abstract

Of the four chromene compounds; 3,3-diphenyl-5,10a-dihydro-3H-benzo[f]chromene (CHR1), 6-methoxy-2,2-diphenyl-2H-benzo[h]chromene (CHR2), 2,2-diphenyl-2H-benzo[h]chromene (CHR3) and 6,7-dimethoxy-2,2- diphenyl-2H-chromene (CHR4), CHR2–4 exhibited crystalline state photochromism.

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Supplementary files

Microscopic colour images showing photocolouration and bleaching of CHR ₃ crystals. a) CH ₃ crystal space selectively photocoloured with a 330–380 nm light source. b) Subsequently photobleached with 510–560 nm light. c) Subsequently recoloured with a larger area 330–380 nm light source. GIF (205K)

Article information

DOI: https://doi.org/10.1039/B003480K
Article type: Communication
Submitted: 02 May 2000
Accepted: 12 Jun 2000
First published: 29 Jun 2000

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Chem. Commun., 2000, 1339-1340

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Photochromism of chromene crystals; a new property of old chromenes

J. Hobley, V. Malatesta, R. Millini, W. Giroldini, L. Wis, M. Goto, M. Kishimoto and H. Fukumura, Chem. Commun., 2000, 1339 DOI: 10.1039/B003480K

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Chemical Communications

Abstract

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Photochromism of chromene crystals; a new property of old chromenes

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