Lewis acid sites of bivalent silicon and quantum-chemical studies of interaction with CO

1990 ◽  
Vol 41 (1) ◽  
pp. 59-64 ◽  
Author(s):  
I. I. Zakharov ◽  
G. M. Zhidomirov
Keyword(s):  
Lewis Acid ◽  
Quantum Chemical ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
Chemical Studies ◽  
Quantum Chemical Studies

Amine-reactive surface chemistry of zinc phosphate glasses

1995 ◽  
Vol 10 (8) ◽  
pp. 2120-2127 ◽  
Author(s):  
L.S. Hersh ◽  
E.C. Onyiriuka ◽  
W. Hertl
Keyword(s):  
Lewis Acid ◽  
Softening Point ◽  
Zinc Phosphate ◽  
Acid Sites ◽  
Phosphate Glasses ◽  
Polymer Chains ◽  
Lewis Acid Sites ◽  
Oh Groups ◽  
Chemical Studies ◽  
Glass Surfaces

Surface chemical studies on zinc phosphate glasses were carried out with an ammonia probe using FTIR and XPS. Low softening point zinc phosphate glasses can be co-extruded with high softening point polymers to form polymer filled blends. NH3 reacts with P-OH groups (Br⊘nsted acid sites) to form bound NH4+ and with the zinc ions (Lewis acid sites) to form coordinately bound NH3. Bulk nitridation reactions, forming various P-N bonds to >100 nm, occur concurrently. The glass surfaces were depleted in Zn compared to the batch compositions. Exposure to ambient water vapor removed Lewis acid bound ammonia; aqueous washing removed both types. Di- and tri-methyl amines also reacted with surface Br⊘nsted and Lewis acid sites. These amine reactions have the potential for binding polymer chains to the glass surface.

Quantum-chemical analysis of the coordination of nitroxide probes by Lewis acid sites on the surface of Al2O3

1997 ◽  
Vol 7 (5) ◽  
pp. 191-193 ◽  
Author(s):  
Nikolai D. Chuvylkin ◽  
Andrei M. Tokmachev ◽  
Alexander V. Fionov ◽  
Elena V. Lunina
Keyword(s):  
Chemical Analysis ◽  
Lewis Acid ◽  
Quantum Chemical ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
Quantum Chemical Analysis

Quantum chemical studies of acid sites in zeolite ZSM-5

1993 ◽  
Vol 97 (45) ◽  
pp. 11754-11761 ◽  
Author(s):  
Antonio Redondo ◽  
P. Jeffrey Hay
Keyword(s):  
Quantum Chemical ◽  
Acid Sites ◽  
Chemical Studies ◽  
Quantum Chemical Studies

Coordination of nitroxyl radical probes to the Lewis acid sites on the surface of gallium oxide: A quantum-chemical analysis

2000 ◽  
Vol 49 (6) ◽  
pp. 991-996 ◽  
Author(s):  
A. M. Tokmachev ◽  
Yu. N. Pushkar ◽  
A. V. Fionov ◽  
E. V. Lunina ◽  
N. D. Chuvylkin
Keyword(s):  
Chemical Analysis ◽  
Lewis Acid ◽  
Quantum Chemical ◽  
Gallium Oxide ◽  
Nitroxyl Radical ◽  
Acid Sites ◽  
Lewis Acid Sites ◽  
Quantum Chemical Analysis

Quantum Chemical Studies of Hole Transfer in Liquid Hexane

2017 ◽  
Vol 137 (7) ◽  
pp. 435-441
Author(s):  
Masahiro Sato ◽  
Akiko Kumada ◽  
Kunihiko Hidaka ◽  
Toshiyuki Hirano ◽  
Fumitoshi Sato
Keyword(s):  
Quantum Chemical ◽  
Hole Transfer ◽  
Chemical Studies ◽  
Quantum Chemical Studies
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