Generation of Gas-Phase VO2+, VOOH+, and VO2+−Nitrile Complex Ions by Electrospray Ionization and Collision-Induced Dissociation

2006 ◽  
Vol 110 (41) ◽  
pp. 11627-11635 ◽  
Author(s):  
Zack Parsons ◽  
Chris Leavitt ◽  
Thanh Duong ◽  
Gary S. Groenewold ◽  
Garold L. Gresham ◽  
...  
Keyword(s):  
Electrospray Ionization ◽  
Gas Phase ◽  
Collision Induced Dissociation ◽  
Complex Ions

Diastereoisomeric proton-bound complexes of 1,5-diaza-cis-decalin in the gas phase

2009 ◽  
Vol 74 (2) ◽  
pp. 243-254 ◽  
Author(s):  
Jana Roithová
Keyword(s):  
Mass Spectrometry ◽  
Nitrogen Atom ◽  
Dft Calculations ◽  
Electrospray Ionization ◽  
Gas Phase ◽  
Energy Difference ◽  
Ion Pair ◽  
Collision Induced Dissociation ◽  
Chiral Effects

Diastereoisomeric proton-bound complexes of 1,5-diaza-cis-decalin (1) with butan-2-amine (2) are studied by means of the DFT calculations and mass spectrometry. The calculations reveal that 2 is bound via proton to only one nitrogen atom of the bicyclic base 1. The homochiral complex is favored by about 4 kJ/mol over the heterochiral complex. For a more loosely bound ion-pair complex [(1H)I(2H)]+ of the protonated bases 1 and 2 with an iodine counterion the energy difference drops to about 2 kJ/mol. Chiral effects in the formation of [(1)H(2)]+ are studied by the collision-induced dissociation of [(1H)I(2H)]+ generated by the electrospray ionization of the solution of [1·Cu(OH)I] and 2 in acetonitrile. The dominant fragmentation of [(1H)I(2H)]+ leads to 1·H+ and 2·HI, which is at small collision energies accompanied by the elimination of HI leading to the desired [(1)H(2)]+ ion. The chiral effect of 1.2 is determined in favor for the formation of the homochiral complex [(1)H(2)]+.

Electrospray ionization mass spectrometry of the cerium(III)-phosphomolybdate complex (NH4)11Ce(PMo11O39)2

2010 ◽  
Vol 1264 ◽  
Author(s):  
Travis Henry Bray ◽  
Roy Copping ◽  
David K. Shuh ◽  
John Gibson
Keyword(s):  
Mass Spectrometry ◽  
Electrospray Ionization ◽  
Gas Phase ◽  
Ion Trap ◽  
Quadrupole Ion Trap ◽  
Collision Induced Dissociation ◽  
Ion Trap Mass Spectrometry ◽  
Ionization Mass ◽  
Naturally Occurring ◽  
Gas Phase Ions

AbstractElectrospray ionization quadrupole ion trap mass spectrometry of the ammonium lanthanide(III) phosphomolybdate complex (NH4)11Ce(III)(PMo11O39)2 has been conducted revealing the Ce-POM complexes H2Ce(III)P2Mo22O753- and Ce(III)PMo11O382- as the primary Ce species in 10 mM solutions. From the complex isotopic fingerprints produced through the assembly of multiple molybdenum atoms, a transition metal with seven naturally occurring isotopes, the identities of larger ions were confirmed via successive collision induced dissociation (CID) studies of the gas phase ions. The result of these CID studies was the production of smaller ions with reduced molybdenum content, allowing for comparison between calculated and experimental isotopic distributions. CID studies also provided insights into favored fragmentation pathways. These studies provide a basis to explore speciation and ESI behavior of actinide cluster complexes.

Impact of Ambient Vapors Present in an Electrospray Ionization Source on Gas-Phase Ion Structures

2021 ◽  
Vol 32 (3) ◽  
pp. 725-735
Author(s):  
Zhaoyu Zheng ◽  
Athula B. Attygalle
Keyword(s):  
Electrospray Ionization ◽  
Gas Phase ◽  
Ionization Source ◽  
Gas Phase Ion
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