Issue 4, 2004
From the journal:

Organic & Biomolecular Chemistry

Photochromism of polymorphic 4,4′-methylenebis(N-salicylidene-2,6-diisopropylaniline) crystals

Masatsugu Taneda,a   Kiichi Amimoto,a   Hiroyuki Koyamaa  and  Toshio Kawato*a  

* Corresponding authors

a Department of Chemistry, Faculty of Sciences, Kyushu University, 4-2-1 Ropponmatsu, Chuo-ku, Fukuoka 810-8560, Japan
E-mail: kawato@chem.rc.kyushu-u.ac.jp

Abstract

4,4′-Methylenebis(N-salicylidene-2,6-dialkylaniline) derivatives were prepared and their structures were determined by 1H NMR, IR, DSC and X-ray crystallographic analyses. The 2,6-diisopropylaniline derivative yielded definite polymorphic crystals: the space groups of the crystals were C2/c and P21/n, respectively. It was found that both polymorphs were similarly photochromic but the thermal stability of the photochrome was different due to the variance of the shape of molecule and cavity in each crystal.

Graphical abstract: Photochromism of polymorphic 4,4′-methylenebis(N-salicylidene-2,6-diisopropylaniline) crystals

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Article information

DOI
https://doi.org/10.1039/B311669G
Article type
Paper
Submitted
23 Sep 2003
Accepted
09 Dec 2003
First published
21 Jan 2004

Org. Biomol. Chem., 2004,2, 499-504

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Photochromism of polymorphic 4,4′-methylenebis(N-salicylidene-2,6-diisopropylaniline) crystals

M. Taneda, K. Amimoto, H. Koyama and T. Kawato, Org. Biomol. Chem., 2004, 2, 499 DOI: 10.1039/B311669G

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