摘要:

We synthesized the Fe intercalated misfit layer compounds (LaS)1.19[Fe0.33(TiS2)2] and (CeS)1.19[Fe0.33(TiS2)2], and investigated their structure and magnetism. It was found by electron diffraction study that the intercalated Fe atoms form the ⇒3×⇒3 superstructure to the TiS2lattice. The Fe atoms order ferromagnetically bellow 45 K. The long interlayer distance of Fe indicates that the quasi two-dimensional itinerant ferromagnetism of Fe is formed in these compounds. The magnetization curve of (CeS)1.19[Fe0.33(TiS2)2] below TN=2.7 K of the antiferromagnetic transition temperature of Ce is formed of the superposition of the hysteresis curve of ferromagnetic Fe layer and the metamagnetic curve of Ce layer occurring at 0.15 T. This suggests that nine different magnetic states can be attained below 0.2T by different field cooling process.

ISSN:1058-725X    

DOI:10.1080/10587259808042379

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The bimetallic Ni0.6Fe0.4PS3and and Ni0.83Cu0.34PS3layered compounds are shown to be more efficient than NiPS3at catalysing the oxydation of sulfide ions into sulfur at room temperature. The related sodium intercalates exhibit an even larger efficiency. An XPS study of these compounds is presented and discussed in relation to the catalytic activity.

ISSN:1058-725X    

DOI:10.1080/10587259808042380

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The layered NiPS3-Cobaltocene intercalation compound is shown to acquire spontaneous magnetization below 70 K, although NiPS3orders antiferromagnetically. An XPS study of this intercalate is described, which shows that the electronic density at the Ni, P and S atoms is increased upon intercalation.

ISSN:1058-725X    

DOI:10.1080/10587259808042381

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

X-ray photoemission study for FexTiTe2and investigation of thermodynamic functions for AgxTiTe2were carried out. It was shown that intercalation of Ag and Fe into TiTe2leads to a rising of a narrow band at the Fermi level, probably due to appearance of the covalent “bridges” between the host lattice layers.

ISSN:1058-725X    

DOI:10.1080/10587259808042382

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The crystal structure of Fe(NH3)2Ni(CN)4·2C4H4S 3 has been determined by single crystal X-ray determination. The thiophene molecules in the interlayer space display the orientational disorder associated with the location of the S atom. The57Fe Mössbauer spectrum at RT (before cooling to 78 K) indicates one kind of high spin iron(II) site, while that at 78 K shows two kinds, suggesting that the phase transition or the decomposition of the host framework occurs on cooling. There still exist two kinds of sites at RT (after heating from 78 K) probably due to the irreversible phase transition.

ISSN:1058-725X    

DOI:10.1080/10587259808042383

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

A general overview on Lamellar Double Hydroxides (LDHs) is given, includind discussions about the structure and preparative methods. A tentative development strategy illustrated by examples is suggested.

ISSN:1058-725X    

DOI:10.1080/10587259808042384

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Intercalation of electroactive organic sulfonate anions, such as aromatic and organo-metallic derivatives, into LDH anion exchanger.

ISSN:1058-725X    

DOI:10.1080/10587259808042385

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Tartrate anion has been intercalated in [Zn3Al] and [Zn2Cr] LDHs. The preparations using either coprecipitation, anionic exchange or reconstruction methods are described. The structural characterization, the thermal evolution and the chemical stability of these phases are studied by PXRD, FTIR, TGA and DTA. Results are presented here.

ISSN:1058-725X    

DOI:10.1080/10587259808042386

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The chloride ions of synthetic hydrotalcite [Zn0.67A10.33(OH)2]Cl0.330.4H2O were fully exchanged with CnH2n+1PO3H−and CnH2n+1PO3anions (n=0, 1, 2, 3,4) and the products obtained were characterised for their composition, X-ray diffraction powder patterns, FT-IR absorption spectra and thermal behaviour n-Alkylphosphonate anions are accommodated in the interlayer region as a monomolecular film with the alkyl-chains almost perpendicular to the layer plane and an odd-even alternation of the interlayer distance, as a function of the number of carbon atoms in the alkyl-chain, is observed. As a consequence of a mild thermal treatment the hydrogenphosphonates react with the hydroxyls and attach themselves to the inorganic layer to produce novel Zn and Al hydroxy alkylphosphonates that are able to intercalate n-alkanols.

ISSN:1058-725X    

DOI:10.1080/10587259808042387

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

A [Zn-Cr-Br] Lamellar Double Hydroxide is studied by PXRD and XAFS at Zn, Cr and Br K-edges. The local environment around these three probes is discussed.

ISSN:1058-725X    

DOI:10.1080/10587259808042388

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor