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Intercalation of an amphiphilic azobenzene derivative into the interlayer space of a layered silicate, magadiite

Published online by Cambridge University Press:  09 July 2018

M. Ogawa*
Affiliation:
PRESTO, Japan Science and Technology Corporation Department of Earth Sciences, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo169-8050
M. Yamamoto
Affiliation:
Department of Applied Chemistry, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo169-8555
K. Kuroda
Affiliation:
Department of Applied Chemistry, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo169-8555 Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, Nishiwaseda 2-8-26, Shinjuku-ku, Tokyo 169-0051, Japan
*

Abstract

Intercalation of an ammonium amphiphile having an azobenzene chromophore, 4-dodecyloxy-4 ‘-(trimethylammoniopentyloxy)azobenzene and 4-(ω-trimethylammoniodecyloxy) -p’- (octyloxy)azobenzene bromide, into the layered silicate magadiite (ideal formula Na2Si14O29·nH2O) was carried out by a conventional ion exchange reaction in an aqueous medium. An intercalation compound with the ideal formula {(C12AzoC5N+)1.4H0.6·Si14O29·nH2O} was obtained. Based on the change in the basal spacing (to 4.21 nm) after the reaction and the visible absorption spectrum of the product, the intercalated azo dyes appear to form a J-aggregate in the interlayer space of magadiite. Under UV and visible light irradiation, the intercalated azo chromophore exhibited reversible transcis isomerization in the interlayer space of magadiite. This is the first successful report of photochemical reactions of guest species in the interlayer space of magadiite.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2001

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