scholarly journals Actual Symmetry of Symmetric Molecular Adducts in the Gas Phase, Solution and in the Solid State

Symmetry ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 756
Author(s):  
Ilya G. Shenderovich
Keyword(s):  
Gas Phase ◽  
Noncovalent Interactions ◽  
Experimental Methods ◽  
Model Systems ◽  
Symmetric Structure ◽  
Phase Solution ◽  
Water Hydrogen ◽  
Different Time Scales ◽  
Steric Hindrances ◽  
Molecular Adducts

This review discusses molecular adducts, whose composition allows a symmetric structure. Such adducts are popular model systems, as they are useful for analyzing the effect of structure on the property selected for study since they allow one to reduce the number of parameters. The main objectives of this discussion are to evaluate the influence of the surroundings on the symmetry of these adducts, steric hindrances within the adducts, competition between different noncovalent interactions responsible for stabilizing the adducts, and experimental methods that can be used to study the symmetry at different time scales. This review considers the following central binding units: hydrogen (proton), halogen (anion), metal (cation), water (hydrogen peroxide).

Gas-Phase Anionic Metal Clusters are Model Systems for Surface Oxidation: Kinetics of the Reactions of Mn– with O2 (M = V, Cr, Co, Ni; n = 1–15)

2021 ◽  
Vol 125 (10) ◽  
pp. 2069-2076
Author(s):  
Brendan C. Sweeny ◽  
David C. McDonald ◽  
Nicholas S. Shuman ◽  
Albert A. Viggiano ◽  
Juergen Troe ◽  
...  
Keyword(s):  
Gas Phase ◽  
Oxidation Kinetics ◽  
Metal Clusters ◽  
Surface Oxidation ◽  
Model Systems ◽  
Kinetics Of

scholarly journals Experimental Determination of the Resistivity Limits for Platinum and Iron Metal Gases Using an Exploding Wire

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 424 ◽  
Author(s):  
Luis Bilbao ◽  
Gonzalo Rodríguez Prieto
Keyword(s):  
Gas Phase ◽  
Measurement Method ◽  
Platinum Metal ◽  
Experimental Methods ◽  
Exploding Wire ◽  
Expansion Phase ◽  
Iron Metal ◽  
Gas Expansion ◽  
Solid Liquid

Transport properties of metals in solid, liquid, gas or plasma phases are an open area of research, both theoretically and experimentally. Concretely, there are no measurements available for the resistivity of gas phase of metals. In the latter case, the use of exploding wire systems allows one to reach states from solid to plasma that are not accessible with other experimental methods. In this work, following a measurement method previously used with copper, experimental resistivity limits of iron and platinum metal gases are presented based on measurements performed on the metal gas expansion phase.

The use of a silica-based heat sink to “uncouple” the matrix-assisted laser desorption/ionization (MALDI) mechanism

2011 ◽  
Vol 89 (4) ◽  
pp. 446-460 ◽  
Author(s):  
E. Lourantos ◽  
O. M. Ramirez ◽  
A. E. Giannakopulos ◽  
K. A. Beran ◽  
Peter J. Derrick ◽  
...  
Keyword(s):  
Gas Phase ◽  
Heat Sink ◽  
Model System ◽  
Model Systems ◽  
Laser Desorption Ionization ◽  
System A ◽  
The Matrix ◽  
Pass Through ◽  
Maldi Mechanism ◽  
Silicon Based

The relationships between ion yield(s) as a function of desorption alone and (or) ionization was investigated using two model systems. In the first model system, a carbohydrate (2,3,6-tri-O-methyl-β-cyclodextrin, TMBCD), which could be directly laser desorbed, was analyzed with and without a silicon-based heat sink compound (HSC). The HSC allowed heat to pass through but obstructed the flow of charge. In the second model system, a peptide (substance P), which ccould not be laser desorbed, was analyzed under similar conditions. The ion yield of TMBCD under either system of heat conductivity was similar, whereas the ion yield of the peptide with the heat sink was negligible. Compounds that are predominately cationized either in the gas phase or preformed in solution give an ion yield that is not dependent upon the surface conditions, whereas compounds that are not ordinarily cationized are affected by the emission of electrons from the metal surface.

ChemInform Abstract: 1,2-Diphenylcycloalkenes: Electronic and Geometric Structures in the Gas Phase, Solution, and Solid State.

ChemInform ◽  
1988 ◽  
Vol 19 (45) ◽  
Author(s):  
G. HOHLNEICHER ◽  
M. MUELLER ◽  
M. DEMMER ◽  
J. LEX ◽  
J. H. PENN ◽  
...  
Keyword(s):  
Solid State ◽  
Gas Phase ◽  
Geometric Structures ◽  
Phase Solution ◽  
Electronic And Geometric Structures

β-sheet model systems in the gas phase: Structures and vibrations of Ac–Phe–NHMe and its dimer (Ac–Phe–NHMe)2

2004 ◽  
Vol 6 (10) ◽  
pp. 2682-2690 ◽  
Author(s):  
M. Gerhards ◽  
C. Unterberg ◽  
A. Gerlach ◽  
A. Jansen
Keyword(s):  
Gas Phase ◽  
Model Systems ◽  
Phase Structures ◽  
Β Sheet
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