Issue 12, 2002
From the journal:

Journal of Materials Chemistry

Intercalation of cationic phthalocyanines into layered titanates and control of the microstructures†

Ryozo Kaito,a   Nobuyoshi Miyamoto,a   Kazuyuki Kurodaab  and  Makoto Ogawa*c  

* Corresponding authors

a Department of Applied Chemistry, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo 169-8555, Japan

b Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, Nishiwaseda 2, Shinjuku-ku, Japan

c PRESTO, Japan Science and Technology Corporation and Department of Earth Sciences, Waseda University, Nishiwaseda 1-6-1, Shinjuku-ku, Tokyo 169-8050, Japan

Abstract

Two cationic phthalocyanines (Pc), a tetravalent Alcian Blue pyridine variant (ABpy4+) and a monovalent iron(III) phthalocyanine (FePc+), were intercalated into two layered titanates derived from Na2Ti3O7 and CsxTi2 − x/4□x/4O4 (□ = vacancy, x = 0.7) by using the corresponding propylammonium titanates as the intermediates for guest displacement reactions. When Na2Ti3O7 was used as a host, segregation occurred in the products, since it has a relatively higher layer charge density; some interlayer spaces accommodated Pc, but the others contained propylammonium cations. On the other hand, Pc cations were homogeneously intercalated into the interlayer spaces of Ti2 − x/4□x/4O4 layers. ABpy4+ formed agglomerates in the gallery between Ti2 − x/4□x/4O4 layers, whereas FePc+ was distributed molecularly. In the ABpy–Ti2 − x/4□x/4O4 system, further ABpy4+ was added or any remaining propylammonium cations were removed by thermal treatment under reduced pressure in order to vary the microstructure, which resulted in the formation of higher aggregated states of ABpy4+. Electron transfer from FePc+ to Ti2 − x/4□x/4O4 induced by visible light irradiation was observed for FePc–Ti2 − x/4□x/4O4 by fluorescence measurements.

Graphical abstract: Intercalation of cationic phthalocyanines into layered titanates and control of the microstructures

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Article information

DOI
https://doi.org/10.1039/B210237B
Article type
Paper
Submitted
01 May 2002
Accepted
17 Oct 2002
First published
06 Nov 2002

J. Mater. Chem., 2002,12, 3463-3468

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Intercalation of cationic phthalocyanines into layered titanates and control of the microstructures

R. Kaito, N. Miyamoto, K. Kuroda and M. Ogawa, J. Mater. Chem., 2002, 12, 3463 DOI: 10.1039/B210237B

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