Rare‐Gas Molecule‐Ion Formation by Mass Spectrometry. Kinetics of Ar2+, Ne2+, and He2+Formation by Second‐ and Third‐Order Processes

1962 ◽  
Vol 36 (12) ◽  
pp. 3332-3344 ◽  
Author(s):  
J. S. Dahler ◽  
J. L. Franklin ◽  
M. S. B. Munson ◽  
F. H. Field
Keyword(s):  
Mass Spectrometry ◽  
Rare Gas ◽  
Third Order ◽  
Ion Formation ◽  
Gas Molecule ◽  
Kinetics Of

Zeolites Fit For A Crown: Probing Host-Guest Interactions with Thermogravimetric Methods

2018 ◽  
Author(s):  
Asel Sartbaeva ◽  
Paul R. Raithby ◽  
Remi Castaing ◽  
Antony Nearchou
Keyword(s):  
Mass Spectrometry ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Petrochemical Industry ◽  
Rational Use ◽  
New Methodologies ◽  
First Time ◽  
Kinetics Of

Through a combination of thermogravimetry, mass spectrometry and differential thermal analysis, we demonstrate for the first time that all four zeolites show experimental differences in their host-guest interactions with 18C6. In addition, we have estimated the kinetics of 18C6 decomposition, which is a technique that has not been applied to zeolites previously. Using these findings as a toolkit, a more rational use of OSDAs can be utilised to prepare designer zeolites. Furthermore, the new methodologies presented herein can be applied to current zeolites, such as MFI-type zeolites used in the petrochemical industry.

Evidence for general base catalysis by protic solvents in a kinetic study of alcoholyses and hydrolyses of 1-(phenoxycarbonyl)pyridinium ions under both solvolytic and non-solvolytic conditions

2009 ◽  
Vol 74 (1) ◽  
pp. 43-55 ◽  
Author(s):  
Dennis N. Kevill ◽  
Byoung-Chun Park ◽  
Jin Burm Kyong
Keyword(s):  
Second Order ◽  
Base Catalysis ◽  
Substitution Reactions ◽  
Third Order ◽  
Methoxy Derivative ◽  
First Order ◽  
General Base ◽  
Protic Solvents ◽  
Kinetics Of ◽  
Pyridinium Ions

The kinetics of nucleophilic substitution reactions of 1-(phenoxycarbonyl)pyridinium ions, prepared with the essentially non-nucleophilic/non-basic fluoroborate as the counterion, have been studied using up to 1.60 M methanol in acetonitrile as solvent and under solvolytic conditions in 2,2,2-trifluoroethan-1-ol (TFE) and its mixtures with water. Under the non- solvolytic conditions, the parent and three pyridine-ring-substituted derivatives were studied. Both second-order (first-order in methanol) and third-order (second-order in methanol) kinetic contributions were observed. In the solvolysis studies, since solvent ionizing power values were almost constant over the range of aqueous TFE studied, a Grunwald–Winstein equation treatment of the specific rates of solvolysis for the parent and the 4-methoxy derivative could be carried out in terms of variations in solvent nucleophilicity, and an appreciable sensitivity to changes in solvent nucleophilicity was found.

Investigations on the production kinetics of ionic alkali–rare gas excimers

1992 ◽  
Vol 97 (5) ◽  
pp. 3325-3332 ◽  
Author(s):  
M. Mantel ◽  
M. Schumann ◽  
A. Giez ◽  
H. Langhoff ◽  
W. Hammer ◽  
...  
Keyword(s):  
Rare Gas ◽  
Production Kinetics ◽  
Kinetics Of

Ionization characteristics of glycosides by direct analysis in real time quadrupole-time of flight mass spectrometry

2017 ◽  
Vol 41 (3) ◽  
pp. 1103-1109 ◽  
Author(s):  
Hongmei Yang ◽  
Ge Gao ◽  
Yihan Wang ◽  
Jinrong Liu ◽  
Zongjun Li ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Real Time ◽  
Time Of Flight ◽  
Direct Analysis ◽  
Molecular Ion ◽  
Ion Formation ◽  
Flight Mass Spectrometry

Glycosides were ionized via various different reactions including (de)protonation, molecular ion formation, ISD fragmentation, and the formation of adducts.

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