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complex precursors
The membrane surfaces have been modified by the alkoxide method using colloidal organic solutions of metal complex precursors.
      
Complex Precursors for Doped Lanthanum Chromite Synthesis
      
This paper deals with the preparation of LaCr1-xMxO3 (M = Ni, Cu, x = 0 - 0.2) from complex precursors isolated in the La(NO3)3-Cr(NO3)3-M(NO3)2-urea system.
      
The isolated complex precursors were characterized by atomic absorption spectrometry, electronic, and FT-IR spectra, as well as, by thermal analysis.
      
Application of known dialkyl ketene di- and trimerization to more complex precursors could readily open the route to highly functionalized symmetrical cyclobuta-1,3-diones and cyclohexa-1,3,5-triones.
      
The principles of benzene hydrogenation have been studied with sulfide catalysts NI/MS2, Ni/SiO2, M/SiO2 and (Ni, M)/SiO2 (M=Mo, W) obtained via metal complex precursors or by impregnation.
      
Isolation of ternary complex precursors and partially condensed?intermediates to macrocyclic complexes of nickel(II) and copper(
      
The conversion of metal complex precursors to the corresponding metal sulfides was carried outin situ in the THQ solution at 210-270 °C.
      
The catalyst prepared via the Pt-Sn complex precursors exhibited some-what lower specific activity.
      
In the present study, the alkaline-earth doped lanthanum chromites La1-xSrxCrO3 (x=0-0.3) and La0.7Ca0.3CrO3 were prepared from complex precursors isolated from the La(NO3)3-Cr(NO3)3-urea system.
      
 

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