Gas-phase ions

Dessent C E FI and Johnson M A 1998 Fundamentals of negative ion photoelectron spectroscopy Fundamentals and Applications of Gas Phase Ion Chemistry ed K R Jennings (Berlin Kluwer)... 

Mead R D, Stevens A E and Lineberger W C 1984 Photodetachment in negative ion beams Gas Phase Ion Chemistry ed M T Bowers (New York Academic)... 

Ikezoe Y, Matsuoka S, Takebe M and Viggiano A A 1987 Gas Phase Ion-Molecule Reaction Rate Constants Through 1986 (Tokyo Maruzen)... 

Graul S T and Squires R R 1988 Advances in flow reactor techniques for the study of gas-phase ion chemistry Mass Spectrom. Rev. 7 263-358... 

Knighton W B and Grimsurd E P 1996 Gas phase ion ohemistry under oonditions of very high pressure Advances in Gas Phase Ion Chemistry ed N G Adams and L M Baboook (JAI)... 

Lias S G, Bartmess J E, Liebman J F, Hoimes J L, Levin R D and Maiiard W G 1988 Gas-phase ion and neutrai thermochemistry J. Phys. Chem. Ref. Data 17, Supplement 1 1-861... 

Keesee R G and Castieman A W Jr 1986 Thermochemicai data on gas-phase ion-moiecuie association and ciustering reactions J. Phys. Chem. Ref Data 15 1011... 

Armentrout P B and Baer T 1996 Gas phase ion dynamics and chemistry J. Phys. Chem. 100 12 866-77... 

Ferguson E E, Fehsenfeid F C and Aibritton D L 1979 ion chemistry of the earth s atmosphere Gas Phase Ion Ghemistry ed M T Bowers (San Diego, CA Academic)... 

Adams N G and Babcock L M (eds) 1992, 1996 and 1998 Advances in Gas Phase Ion Chemistry vols 1-3 (Greenwich, CT JAI) On ongoing series about current topics in ion chemistry. 

It is possible to detemiine the equilibrium constant, K, for the bimolecular reaction involving gas-phase ions and neutral molecules in the ion source of a mass spectrometer [18]. These measurements have generally focused on tln-ee properties, proton affinity (or gas-phase basicity) [19, 20], gas-phase acidity [H] and solvation enthalpies (and free energies) [22, 23] ... 

In an earlier section, measurements were described in which the equilibrium constant, K, for bimolecular reactions involving gas-phase ions and neutral molecules were detennined. Another method for detemiining the proton or other affinity of a molecule is the bracketing method [ ]. The principle of this approach is quite straightforward. Let us again take the case of a proton affinity detemiination as an example. In a reaction... 

This is the seminal book on metastable ions, their chemistry and experimental observation. It is a must for anyone starting out in gas-phase ion chemistry. 

Blades A T, Jayaweera P, Ikonomou M G and Kebarle P 1990 Studies of alkaline earth and transition metal M " gas phase ion chemistry J. Chem. Phys. 92 5900... 

ITiscusaioa of (be techniques for gas-(>haau equilibrium meaauiuncaita can be found in T. A. Lehman and M. M. Buisey, Ion Cyclotron Resonance ectrometry, Wiky-Interscience, New yfaik, 1976 M. T. Bowers, ed., Gas Phase Ion Chemistry, Vols. I and 2, Aeadetnic Press, New Ypik, 1979. 

Both experimental studies on gas-phase ion stability and MO calculations indicate that the two vinyl cations shown below benefit fiom special stabilization. Indicate what stmctural features present in these cations can provide this stabilization. 

In the magnetic-sector instrument (Figure 1.1), gas phase ions produced in the ion source by one of several different methods are accelerated from near rest (thermal energy) through a potential gradient (commonly kV). These ions travel through a vacuum chamber into a magnetic field at a... 

Oxidation state is a frequently used (and indeed misused) concept which apportions charges and electrons within complex molecules and ions. We stress that oxidation state is a formal concept, rather than an accurate statement of the charge distributions within compounds. The oxidation state of a metal is defined as the formal charge which would be placed upon that metal in a purely ionic description. For example, the metals in the gas phase ions Mn + and Cu are assigned oxidation states of +3 and +1 respectively. These are usually denoted by placing the formal oxidation state in Roman numerals in parentheses after the element name the ions Mn- " and Cu+ are examples of manganese(iii) and copper(i). 

In the later 1920 s, physicists, rightly flushed with their successes with interpreting the rich, sharp spectra of atoms and gas phase ions, sought to extend their reach to the broader (and fewer) absorption bands that eharacterize the spectra of ions in crystalline matrices. These bands occur at utterly different frequencies to those of the corresponding free ions so that there is no similarity at all between the spectra of free ions and of those in ionic or covalent lattices. 

There is a relationship between these findings for these M2Ga4H2 systems and those recently published for the gas phase ions [LiAPP and [NaAP] ... 

Schroder D, Schwarz H (2003) Diastereoselective Effects in Gas-Phase Ion Chemistry. 225 129-148... 

Gas-phase ion-molecule reactions involving ionic analytes would lead to their neutralization and, consequently these have to be minimized. This requires careful control of both the composition and the concentration of any buffer used. 

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