Exploring Gas-Phase Ion−Ionophore Interactions: Infrared Spectroscopy of Argon-Tagged Alkali Ion-Crown Ether Complexes†

2010 ◽  
Vol 114 (3) ◽  
pp. 1514-1520 ◽  
Author(s):  
Jason D. Rodriguez ◽  
Dongwook Kim ◽  
Pillarisetty Tarakeshwar ◽  
James M. Lisy
Keyword(s):  
Infrared Spectroscopy ◽  
Crown Ether ◽  
Gas Phase ◽  
Crown Ether Complexes ◽  
Gas Phase Ion ◽  
Alkali Ion

scholarly journals Pseudorotaxanes in the gas phase: structure and energetics of protonated dibenzylamine–crown ether complexes

2018 ◽  
Vol 20 (27) ◽  
pp. 18678-18687 ◽  
Author(s):  
Motoki Kida ◽  
Daisuke Shimoyama ◽  
Toshiaki Ikeda ◽  
Ryo Sekiya ◽  
Takeharu Haino ◽  
...  
Keyword(s):  
Crown Ether ◽  
Gas Phase ◽  
Phase Structure ◽  
Crown Ether Complexes ◽  
Dissociation Threshold ◽  
Gas Phase Structure

Barrier in the “slippage” process with 24C8 and dBAMH+ is lower than the dissociation threshold in the gas phase.

scholarly journals UV and IR Spectroscopic Studies of Cold Alkali Metal Ion–Crown Ether Complexes in the Gas Phase

2011 ◽  
Vol 133 (31) ◽  
pp. 12256-12263 ◽  
Author(s):  
Yoshiya Inokuchi ◽  
Oleg V. Boyarkin ◽  
Ryoji Kusaka ◽  
Takeharu Haino ◽  
Takayuki Ebata ◽  
...  
Keyword(s):  
Crown Ether ◽  
Alkali Metal ◽  
Gas Phase ◽  
Metal Ion ◽  
Spectroscopic Studies ◽  
Alkali Metal Ion ◽  
Crown Ether Complexes ◽  
Ir Spectroscopic

Gas-phase relative stabilities of Tl+-crown ether complexes and Rb+-crown ether complexes

2018 ◽  
Vol 24 (3) ◽  
pp. 279-288 ◽  
Author(s):  
Magdalena Frańska ◽  
Anna Michalak
Keyword(s):  
Mass Spectrometry ◽  
Crown Ether ◽  
Tandem Mass Spectrometry ◽  
Gas Phase ◽  
Collision Induced Dissociation ◽  
Tandem Mass ◽  
Ionic Radii ◽  
Relative Stabilities ◽  
Crown Ether Complexes ◽  
Cation Radius

The gas-phase stabilities of Tl+-crown ether complexes and Rb+-crown ether complexes were studied using the electrospray ionization-collision-induced dissociation-tandem mass spectrometry. Tl+ and Rb+ have identical ionic radii, thus a comparison of the properties of the crown ether complexes with these two cations seems to be justified. The selected crown ethers were 12C4 (it has a cavity smaller than the cation radius), 18C6 (it has a cavity of size similar to the cation radius), 24C8 (it has a cavity greater than the cation radius) and their conjugates. It has been found that the crown ether complexes of stoichiometry 1:1 with Tl+ are more or equally stable in the gas phase than the crown ether complexes with Rb+. However, 2:1 complexes with Tl+ are less stable than the complexes with Rb+.

Reactivity Trends in the Gas Phase Addition of Acetylene to N-protonated Aryl Radical Cations

2020 ◽  
Author(s):  
Oisin Shiels ◽  
P. D. Kelly ◽  
Cameron C. Bright ◽  
Berwyck L. J. Poad ◽  
Stephen Blanksby ◽  
...  
Keyword(s):  
Gas Phase ◽  
Ion Trap ◽  
Radical Cations ◽  
Rate Coefficients ◽  
Similar Process ◽  
Ion Molecule Reactions ◽  
Aromatic Radicals ◽  
Polycyclic Aromatic ◽  
Gas Phase Ion ◽  
Type Radical

<div> <div> <div> <p>A key step in gas-phase polycyclic aromatic hydrocarbon (PAH) formation involves the addition of acetylene (or other alkyne) to σ-type aromatic radicals, with successive additions yielding more complex PAHs. A similar process can happen for N- containing aromatics. In cold diffuse environments, such as the interstellar medium, rates of radical addition may be enhanced when the σ-type radical is charged. This paper investigates the gas-phase ion-molecule reactions of acetylene with nine aromatic distonic σ-type radical cations derived from pyridinium (Pyr), anilinium (Anl) and benzonitrilium (Bzn) ions. Three isomers are studied in each case (radical sites at the ortho, meta and para positions). Using a room temperature ion trap, second-order rate coefficients, product branching ratios and reaction efficiencies are reported. </p> </div> </div> </div>

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