BARIUM AND TITANIUM ARYL OXIDES AS PRECURSORS FOR THE PREPARATION OF THIN-FILM OXIDES - THE EFFECT OF BOMBARDMENT BY O-2(+)

被引:11
作者
BELDERRAIN, TR
ESPINOS, JP
FERNANDEZ, A
GONZALEZELIPE, AR
LEINEN, D
MONGE, A
PANEQUE, M
RUIZ, C
CARMONA, E
机构
[1] UNIV SEVILLA,CSIC,INST CIENCIA MAT,DEPT QUIM INORGAN,E-41071 SEVILLE,SPAIN
[2] UNIV COMPLUTENSE,FAC CIENCIAS QUIM,E-28040 MADRID,SPAIN
[3] CSIC,INST CIENCIA MAT,E-28006 MADRID,SPAIN
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1995年 / 10期
关键词
D O I
10.1039/dt9950001529
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A set of barium aryl oxides of composition [Ba(OC(6)H(2)Bu(2)(t)-2,6-X-4)(2)(thf)(n)] (X = H 1, Me 2, OMe 3 or Bu(t) 4; thf = tetrahydrofuran) has been prepared together with the related adducts [Ba(OC(6)H(2)Bu(2)(t) - 2.6-X-4)(2){P(NMe(2))(3)O}(2)] (X = H 5 or Me 6), which can be obtained by treating compounds 1 and 2 with neat P(NMe(2))(3)O respectively. X-Ray studies showed that 6 has a distorted-tetrahedral structure, with the two Ba-O bonds to the aryl oxide ligands somewhat shorter than those to the P(NMe(2))(3)O groups [2.414(8) vs. 2.579(8) Angstrom]. Samples of complex 4 and [Ti(OC6H3Pr2i-2,6)(4)], respectively, and a third homogeneous sample obtained by mixing equimolar amounts of these have been subjected to bombardment by Ar+ and O-2(+) ions of relatively low energy (3.5 keV) and the ensuing transformation investigated by X-ray photoelectron spectroscopy. No significant variation of the C/M ratio was observed when employing Ar+ ions, but O-2(+) produced a remarkable decrease in the carbon content which leads eventually to the formation of inorganic compounds, BaCO3, TiO2 and BaTiO3, respectively, for the three samples. Action of oxygen plasma on the titanium aryl oxide did not result in a marked decrease in the C/M ratio, but it produced instead high concentrations of carbon- and oxygen-containing species.
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页码:1529 / 1536
页数:8
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