scholarly journals A “one pot” mass spectrometry technique for characterizing solution- and gas-phase photochemical reactions by electrospray mass spectrometry

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19500-19507
Author(s):  
Rosaria Cercola ◽  
Natalie G. K. Wong ◽  
Chris Rhodes ◽  
Lorna Olijnyk ◽  
Neetisha S. Mistry ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Electrospray Mass Spectrometry ◽  
Photochemical Reactions ◽  
Sandwich Complexes ◽  
One Pot ◽  
Ionisation Mass Spectrometry ◽  
Mass Spectrometry Technique ◽  
Spectrometry Technique ◽  
Half Sandwich

The solution and gas-phase dissociative photochemistry of two ruthenium half-sandwich complexes are analysed with electrospray ionisation mass spectrometry in a novel instrument.

scholarly journals Acid-yield measurements of the gas-phase ozonolysis of ethene as a function of humidity using Chemical Ionisation Mass Spectrometry (CIMS)

2011 ◽  
Vol 11 (9) ◽  
pp. 25173-25204 ◽  
Author(s):  
K. E. Leather ◽  
M. R. McGillen ◽  
M. C. Cooke ◽  
S. R. Utembe ◽  
A. T. Archibald ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Formic Acid ◽  
Gas Phase ◽  
Acid Yield ◽  
Ionisation Mass Spectrometry ◽  
Mass Spectrometry Technique ◽  
Spectrometry Technique ◽  
Reaction With Water ◽  
Chemical Ionisation ◽  
Ionisation Mass

Abstract. Gas-phase ethene ozonolysis experiments were conducted at room temperature to determine formic acid yields as a function of relative humidity (RH) using the integrated EXTreme RAnge chamber-Chemical Ionisation Mass Spectrometry technique, employing a CH3I ionisation scheme. RHs studied were <1, 11, 21, 27, 30 % and formic acid yields of (0.07 ± 0.01) and (0.41 ± 0.07) were determined at <1 % RH and 30 % RH respectively, showing a strong water dependence. It has been possible to estimate the ratio of the rate coefficient for the reaction of the Criegee biradical, CH2OO with water compared with decomposition. This analysis suggests that the rate of reaction with water ranges between 1 × 10−12–1 × 10−15 cm3 molecule−1 s−1 and will therefore dominate its loss with respect to bimolecular processes in the atmosphere. Global model integrations suggest that this reaction between CH2OO with water may dominate the production of HC(O)OH in the atmosphere.

scholarly journals Acid-yield measurements of the gas-phase ozonolysis of ethene as a function of humidity using Chemical Ionisation Mass Spectrometry (CIMS)

2012 ◽  
Vol 12 (1) ◽  
pp. 469-479 ◽  
Author(s):  
K. E. Leather ◽  
M. R. McGillen ◽  
M. C. Cooke ◽  
S. R. Utembe ◽  
A. T. Archibald ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Formic Acid ◽  
Gas Phase ◽  
Acid Yield ◽  
Ionisation Mass Spectrometry ◽  
Mass Spectrometry Technique ◽  
Spectrometry Technique ◽  
Reaction With Water ◽  
Chemical Ionisation ◽  
Ionisation Mass

Abstract. Gas-phase ethene ozonolysis experiments were conducted at room temperature to determine formic acid yields as a function of relative humidity (RH) using the integrated EXTreme RAnge chamber-Chemical Ionisation Mass Spectrometry technique, employing a CH3I ionisation scheme. RHs studied were <1, 11, 21, 27, 30 % and formic acid yields of (0.07±0.01) and (0.41±0.07) were determined at <1 % RH and 30 % RH respectively, showing a strong water dependence. It has been possible to estimate the ratio of the rate coefficient for the reaction of the Criegee biradical, CH2OO with water compared with decomposition. This analysis suggests that the rate of reaction with water ranges between 1×10−12–1×10−15 cm3 molecule−1 s−1 and will therefore dominate its loss with respect to bimolecular processes in the atmosphere. Global model integrations suggest that this reaction between CH2OO and water may dominate the production of HC(O)OH in the atmosphere.

scholarly journals Compaction of RNA Hairpins and Their Kissing Complexes in Native Electrospray Mass Spectrometry

2020 ◽  
Author(s):  
Joséphine Abi-Ghanem ◽  
Clémence Rabin ◽  
Massimiliano Porrini ◽  
Frédéric Rosu ◽  
Valerie Gabelica
Keyword(s):  
Mass Spectrometry ◽  
Molecular Dynamics ◽  
Gas Phase ◽  
Electrospray Mass Spectrometry ◽  
Initial Structure ◽  
Native Solution ◽  
Phase Structures ◽  
Rna Hairpins ◽  
Level Calculation ◽  
Structure In Solution

When electrosprayed from native solution conditions, RNA hairpins and kissing complexes acquire charge states at which they get significantly more compact in the gas phase than their initial structure in solution. Here we show the limits of using force field molecular dynamics to interpret the gas-phase structures of nucleic acid complexes in the gas phase, and we suggest that higher-level calculation levels should be used in the future.<br>

Sign in / Sign up

Export Citation Format

Share Document