Hydration of cyclic oxocarbon dianions, such as c-C5O52−, in the gas phase. Charge reduction of hydrates by electron detachment or proton transfer

Arthur, T.; Peschke, Michael; Kebarle, P.

doi:10.1016/s1387-3806(03)00267-7

Cited by 9 publications

(5 citation statements)

References 34 publications

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“…These include in the positive-ion mode protonbound zwitterion clusters and in the negative-ion mode monoanions with imidazole-based carbenes and zwitterion clusters with dianionic centre. The formation of cluster ions with dianionic core is unusual 54 and emphasizes the uniqueness of the combination of electrospray occurring at atmospheric pressure and the ion detection in the dilute gas-phase. In the cluster, the dianion interacts with the cationic part of the zwitterions, to which further zwitterions may aggregate to form larger clusters.…”

Section: Discussionmentioning

confidence: 99%

Zwitterionic clusters with dianion core produced by electrospray ionisation of Brønsted acidic ionic liquids

Wei

Nye

et al. 2012

Phys. Chem. Chem. Phys.

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New Brønsted acidic ionic liquids (BAILs) are prepared by treating zwitterions, which are composed of an imidazolium cation and a sulfonate anion, with an alkanedisulfonic acid. Acidification of the zwitterions produces the cation and deprotonation of the alkanedisulfonic acid forms the anion of the new BAILs. Direct laser desorption/ionisation (LDI), matrix-assisted LDI (MALDI) and electrospray ionisation (ESI) are employed to transfer ions into the gas-phase for detection by mass spectrometry and for dissociation studies by tandem mass spectrometry. The components of the BAILs are confirmed by LDI and MALDI by the detection of the respective cation and anion and by ESI by the observation of the cation and the dianion. A prominent feature of ESI is the formation of aggregates (cluster ions). Positively charged cluster ions are formally composed of multiple zwitterions plus one additional proton. In the negative-ion mode the clusters also incorporate the zwitterions which are, however, linked with the alkanedisulfonate dianion. In collision-induced dissociations (CID), the cationic aggregates show the evaporation of zwitterions until the protonated zwitterion is reached. Similarly, the cluster dianions release zwitterions until the free alkane disulfonate dianion is reached. However, the 1:1 adduct of dianion and zwitterion also displays proton transfer and Coulomb explosion into the mono-protonated disulfonic mono-anion and an imidazole-based carbene with sulfonate mono-anion.

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Section: Discussionmentioning

confidence: 99%

Zwitterionic clusters with dianion core produced by electrospray ionisation of Brønsted acidic ionic liquids

Wei

Nye

et al. 2012

Phys. Chem. Chem. Phys.

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“…Examples of such stable multiply charged anions include those with two anion sites separated spatially by linker groups (e.g., dicarboxylates such as − O 2 C−(CH 2 ) n −CO 2 − ) as well as more exotic anions (e.g., TeF 8 2− or MgF 4 2− ) that derive stability by delocalizing their excess charges over multiple ligands to reduce the internal Coulomb repulsions among the excess charges. An example that was studied by Professor Paul Kebarle’s group is the C 5 O 5 2− dianion shown in Figure . This dianion is stable because its oxygen centers have high intrinsic electron binding power and because the two excess charges are delocalized over five carbon−oxygen units.…”

Section: Section 3 Chemically Conventional Anionsmentioning

confidence: 99%

Section: Section 3 Chemically Conventional Anionsmentioning

confidence: 99%

Molecular Anions

2008

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The experimental and theoretical study of molecular anions has undergone explosive growth over the past 40 years. Advances in techniques used to generate anions in appreciable numbers as well as new ion-storage, ion-optics, and laser spectroscopic tools have been key on the experimental front. Theoretical developments on the electronic structure and molecular dynamics fronts now allow one to achieve higher accuracy and to study electronically metastable states, thus bringing theory in close collaboration with experiment in this field. In this article, many of the experimental and theoretical challenges specific to studying molecular anions are discussed. Results from many research groups on several classes of molecular anions are overviewed, and both literature citations and active (in online html and pdf versions) links to numerous contributing scientists' Web sites are provided. Specific focus is made on the following families of anions: dipole-bound, zwitterion-bound, double-Rydberg, multiply charged, metastable, cluster-based, and biological anions. In discussing each kind of anion, emphasis is placed on the structural, energetic, spectroscopic, and chemical-reactivity characteristics that make these anions novel, interesting, and important.

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“…So sind das in Lösung wohlbekannte Oxalat‐Dianion ([C 2 O 4 ] 2− ) wie auch das cyclische Krokonat‐Dianion ([C 5 O 5 ] 2− ) in der Gasphase nicht stabil. Beide können nur in Gegenwart mehrerer Wassermoleküle nachgewiesen werden,18, 19 was für die Analytik dieser Verbindungsklassen interessant ist. Ebenso ist in der Reihe der 1,ω‐Diolatodiine − O(CC) n O − erst das Dodecahexainderivat [C 12 O 2 ] 2− ( n =6) stabil gegen Elektronenverlust 20.…”

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Stabilität und Coulomb‐Explosion mehrfach geladener Ionen in der Gasphase

Schröder

2004

Angewandte Chemie

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Hydration of cyclic oxocarbon dianions, such as c-C5O52−, in the gas phase. Charge reduction of hydrates by electron detachment or proton transfer

Cited by 9 publications

References 34 publications

Zwitterionic clusters with dianion core produced by electrospray ionisation of Brønsted acidic ionic liquids

Zwitterionic clusters with dianion core produced by electrospray ionisation of Brønsted acidic ionic liquids

Molecular Anions

Stabilität und Coulomb‐Explosion mehrfach geladener Ionen in der Gasphase

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