Intercalation of cationic phthalocyanines into layered titanates and control of the microstructuresElectronic supplementary information (ESI) available: CHN analytical data and amounts of PA and Pc intercalated in Ti3O7 (Table S1), and XRD patterns of products derived from H2Ti3O7 (Fig. S1). See http://www.rsc.org/suppdata/jm/b2/b210237b/

Abstract

Two cationic phthalocyanines (Pc), a tetravalent Alcian Blue pyridine variant (ABpy 41 ) and a monovalent iron(III) phthalocyanine (FePc 1 ), were intercalated into two layered titanates derived from Na 2 Ti 3 O 7 and Cs x Ti 2 2 x/4 % x/4 O 4 (% ~vacancy, x ~0.7) by using the corresponding propylammonium titanates as the intermediates for guest displacement reactions. When Na 2 Ti 3 O 7 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 Ti 2 2 x/4 % x/4 O 4 layers. ABpy 41 formed agglomerates in the gallery between Ti 2 2 x/4 % x/4 O 4 layers, whereas FePc 1 was distributed molecularly. In the ABpy-Ti 2 2 x/4 % x/4 O 4 system, further ABpy 41 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 ABpy 41 . Electron transfer from FePc 1 to Ti 2 2 x/4 % x/4 O 4 induced by visible light irradiation was observed for FePc-Ti 2 2 x/4 % x/4 O 4 by fluorescence measurements. {Electronic supplementary information (ESI) available: CHN analytical data and amounts of PA and Pc intercalated in Ti 3 O 7 (Table S1), and XRD patterns of products derived from H 2 Ti 3 O 7 (Fig. S1). See

Protonic titanate derived from CsxTi2−x/2Mgx/2O4(x = 0.7) with lepidocrocite-type layered structure

“…Increasing interest has recently been paid to layered titanates with lepidocrocite (g-FeOOH)-type layered structure due to their prominent photocatalytic reactivity [1][2][3][4] and interesting interlayer chemistry. [5][6][7][8][9][10][11] One such compound is a titanate with composition Cs x Ti 2Àx/2 Mg x/2 O 4 , 5,12 which is part of the general series A x Ti 2Àx/2 M x/2 O 4 , [12][13][14][15][16] where A is Cs, Rb, or K; M is any of Mg, Fe, Co, Ni, Cu, or Zn, and x is reported as 0.7, 0.75, and 0.8 for Cs, Rb, and K, respectively. As illustrated in Fig.…”

Preparation and some properties of organically modified layered alkali titanates with alkylmethoxysilanes

“…Although the cation exchange reactions with alkylammonium ions [19][20][21][22] and cationic dyes [23][24][25][26] have been reported so far, there are few reports on the covalent attachment of functional units on the surfaces. The reaction of aminopropyltrimethoxysilane or tetraethoxysilane with alkylammonium-exchanged H 2 Ti 4 O 9 ·nH 2 O or H 2 Ti 3 O 7 for the preparation of silica pillared titanates [27,28], that of aminopropyltrimethoxysilane with tetrabutylammonium-exchanged HCa 2 Nb 3 O 10 for the attachment of oleic acid-ligated Fe 3 O 4 nanoparticles onto the surface of HCa 2 Nb 3 O [29], and that of hexamethylcyclotrisiloxane with tetraalkylammonium-exchanged HTiNbO 5 for dispersing HTiNbO 5 in polydimethylsiloxane [30] are reported examples.…”

Highly Efficient Indium(III) Collection from Water by a Reaction with a Layered Titanate (Na2Ti3O7)

“…The adsorption of metal ions, such as Ag I , Ba II , Cu II , Cd II , Pb II , Sr II , and Eu III , onto Na 2 Ti 3 O 7 has been previously reported . In addition to the application of the titanates as adsorbents, the resulting hybrids of the layered titanates containing guest metal ions are worth investigating for use as catalysts, battery components,, and other functional host–guest complexes . For applications as functional materials, the amount and the states of the guest metal ions are important, although there is no general and detailed understanding on the mechanism of the adsorption and the states of the adsorbed metal cations on/in the layered titanates.…”