Oxide-metal catalysts for the reforming of gasolines Communication 5. Some peculiar features of the catalytic and physical properties of palladium catalysts

1959 ◽  
Vol 8 (5) ◽  
pp. 794-799
Author(s):  
Kh. M. Minachev ◽  
M. A. Ryashentseva ◽  
A. M. Rubinshtein
Keyword(s):  
Physical Properties ◽  
Palladium Catalysts ◽  
Metal Catalysts

Synthesis of OLED Materials of Several Triarylamines by Palladium Catalysts and Their Light Emitting Property

2005 ◽  
Vol 2005 (9) ◽  
pp. 558-560 ◽  
Author(s):  
Mingxin Yu ◽  
Meijun Wang ◽  
Xiaohang Chen ◽  
Bingbing Hong ◽  
Xiaoyan Zhang ◽  
...  
Keyword(s):  
Physical Properties ◽  
Palladium Catalysts ◽  
Aryl Halides ◽  
Light Emitting ◽  
H Nmr ◽  
Aryl Amines ◽  
Product Structures ◽  
C Nmr

Primary aryl amines reacted with aryl halides to give the secondary aryl amines by the catalysis of [Pd(dba)2/P(t-Bu)3] at 80 °C in toluene. Secondary aryl amines reacted with 1-bromo-pyrene and 9-bromo-phenanthrene and 2,7-dibromo-9H-fluorene to afford the OLED material of aminopyrene derivatives and aminophenanthrene derivatives and diamino-9H-fluorene type by the catalysis of [Pd(OAc)2/P(t-Bu)3] at 120 °C in o-xylene. The product structures were established by 1H NMR, 13C NMR, 13C(DEPT), HRMS spectra. Physical properties were examined by UV-vis, PL and DSC spectra.

Microstructures of Polybutadienes and Butadiene-Styrene Copolymers

1955 ◽  
Vol 28 (1) ◽  
pp. 121-130
Author(s):  
John L. Binder
Keyword(s):  
Alkali Metal ◽  
Physical Properties ◽  
Metal Catalysts ◽  
Maximum Amount ◽  
Styrene Copolymers ◽  
Emulsion Systems ◽  
Emulsion Polymerizations ◽  
Increasing Temperature ◽  
Butadiene Styrene

Abstract Polybutadienes and butadiene-styrene copolymers were prepared to study the effect of recipe variables on the physical properties and to learn whether there are correlations between the microstructures and physical properties. The changes in the microstructure of emulsion polybutadienes and butadiene-styrene copolymers of the types studied, which can be produced by either recipe variables or changes in temperature, are limited. The maximum amount of cis-1,4-addition amounted to 23 per cent (in the butadiene part of butadienestyrene copolymers) at 100° C, the maximum amount of trans-1,4- was about 80 per cent at −35° C, and the maximum amount of 1,2-addition was about 20 per cent. While the amount of cis-1,4-addition increases with increasing temperature, it is unlikely that polymers containing even 50 per cent cis-1,4-addition can be made at practical temperatures in emulsion systems. The structures of polybutadienes may be changed markedly by alkali-metal catalysts. The structure is affected by the kind of catalyst, by the temperature, and by promotors. Emulsion polymerizations are not likely to yield improved polymers for practical uses, but much can be done to tailor polymers for specific uses by using alkali-metal catalysts in bulk or solution systems.

The Photometric Properties of the Ap Stars

1976 ◽  
Vol 32 ◽  
pp. 365-377 ◽  
Author(s):  
B. Hauck
Keyword(s):  
Physical Properties ◽  
Ap Stars

The Ap stars are numerous - the photometric systems tool It would be very tedious to review in detail all that which is in the literature concerning the photometry of the Ap stars. In my opinion it is necessary to examine the problem of the photometric properties of the Ap stars by considering first of all the possibility of deriving some physical properties for the Ap stars, or of detecting new ones. My talk today is prepared in this spirit. The classification by means of photoelectric photometric systems is at the present time very well established for many systems, such as UBV, uvbyβ, Vilnius, Geneva and DDO systems. Details and methods of classification can be found in Golay (1974) or in the proceedings of the Albany Colloquium edited by Philip and Hayes (1975).

The Infection of Cells by Bullet-Shaped Viruses

1969 ◽  
Vol 27 ◽  
pp. 372-373
Author(s):  
Frederick A. Murphy ◽  
Alyne K. Harrison ◽  
Sylvia G. Whitfield
Keyword(s):  
Electron Microscopy ◽  
Physical Properties ◽  
Host Cell ◽  
Thin Section ◽  
Cultured Cells ◽  
Cell Infection ◽  
Thin Section Electron Microscopy ◽  
Section Electron ◽  
Section Electron Microscopy

The bullet-shaped viruses are currently classified together on the basis of similarities in virion morphology and physical properties. Biologically and ecologically the member viruses are extremely diverse. In searching for further bases for making comparisons of these agents, the nature of host cell infection, both in vivo and in cultured cells, has been explored by thin-section electron microscopy.

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