ChemInform Abstract: N-Bridged Dimers of Tetrapyrroles Complexed by Transition Metals: Syntheses, Characterization Methods, and Uses as Oxidation Catalysts

ChemInform ◽  
2015 ◽  
Vol 46 (28) ◽  
pp. no-no
Author(s):  
Umit Isci ◽  
Fabienne Dumoulin ◽  
Alexander B. Sorokin ◽  
Vefa Ahsen
Keyword(s):  
Transition Metals ◽  
Oxidation Catalysts ◽  
Characterization Methods

Molecular water oxidation catalysts based on transition metals and their decomposition pathways

2012 ◽  
Vol 256 (15-16) ◽  
pp. 1451-1467 ◽  
Author(s):  
Bart Limburg ◽  
Elisabeth Bouwman ◽  
Sylvestre Bonnet
Keyword(s):  
Transition Metals ◽  
Water Oxidation ◽  
Molecular Water ◽  
Oxidation Catalysts

Mixed-Metal Templated Phosphate Phases

1996 ◽  
Vol 432 ◽  
Author(s):  
Tina M. Nenoff ◽  
Nancy B. Jackson ◽  
William T. A. Harrison ◽  
Steven G. Thoma ◽  
Steven D. Kohler
Keyword(s):  
Transition Metals ◽  
Zirconium Phosphate ◽  
Organic Molecules ◽  
Zinc Phosphate ◽  
Catalytic Properties ◽  
X Ray Diffraction ◽  
Characterization Methods ◽  
X Ray ◽  
Catalytically Active ◽  
Phosphate Phase

AbstractIn an effort to direct the structure formation and subsequently the catalytic properties of novel materials, both organic molecules and transition metals have been systematically incorporated into zinc phosphate materials, and various transition metals into zirconium phosphate materials. The resultant phases in the Zn/P experiments are determined not by the organic template, but by the type and stoichiometric amount of metal incorporated and by the organic template's anion. Furthermore, only one of the phases, a Ni/Zn/P, shows any acidic catalytic behavior. Similarly, the transition metals incorporated in stoichiometric amounts into the catalytically active novel zirconium phosphate are highly structure directing. Their presence inhibits the formation of the phosphate phase, instead promoting the formation of tetragonal ZrO2. The catalytic activity of the products are greatly diminished from the baseline material.The synthesis and characterization methods for each phase will be presented. Characterization techniques employed include single-crystal and powder X-ray diffraction, magnetic susceptibility, thermal analysis, DCP and FTIR.

Precipitation in silicon: Microanalysis

1988 ◽  
Vol 46 ◽  
pp. 474-475
Author(s):  
R.W. Carpenter
Keyword(s):  
Transition Metals ◽  
Spatial Resolution ◽  
Thin Foil ◽  
Precipitation Reaction ◽  
High Current ◽  
Reaction Products ◽  
Carbon And Nitrogen ◽  
Dielectric Layers ◽  
Precipitation Processes ◽  
Areas Of Interest

Interest in precipitation processes in silicon appears to be centered on transition metals (for intrinsic and extrinsic gettering), and oxygen and carbon in thermally aged materials, and on oxygen, carbon, and nitrogen in ion implanted materials to form buried dielectric layers. A steadily increasing number of applications of microanalysis to these problems are appearing. but still far less than the number of imaging/diffraction investigations. Microanalysis applications appear to be paced by instrumentation development. The precipitation reaction products are small and the presence of carbon is often an important consideration. Small high current probes are important and cryogenic specimen holders are required for consistent suppression of contamination buildup on specimen areas of interest. Focussed probes useful for microanalysis should be in the range of 0.1 to 1nA, and estimates of spatial resolution to be expected for thin foil specimens can be made from the curves shown in Fig. 1.

MAGNETIC STUDIES OF Clb-COMPOUNDS OF TRANSITION METALS

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-74-C1-75 ◽  
Author(s):  
K. ENDO ◽  
Y. FUJITA ◽  
R. KIMURA ◽  
T. OHOYAMA ◽  
M. TERADA
Keyword(s):  
Transition Metals ◽  
Magnetic Studies
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