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/4O4system, 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.
ASJC Scopus subject areas
- Materials Chemistry