Ion cyclotron resonance spectrometry - a review

Wanczek, K.P.

doi:10.1016/0168-1176(84)80075-0

Cited by 77 publications

(17 citation statements)

References 220 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(MP21 6-31 G*). The accuracy of these calculations may be recognized by the fact that the calculated N-N bond distance (1.131 A) and the bond dissociation energy (9.28 eV) differ only within 3.2% and 5.3% from the well known experimental data, respectively (1.096 A, 9.79 eV).…”

Section: Ab Initio Calculationsmentioning

confidence: 86%

See 1 more Smart Citation

Experimental and Theoretical Investigation of the Azide Anion (N⁻₃) in the Gas Phase

Illenberger¹,

Comita²,

Brauman³

et al. 1985

Ber Bunsenges Phys Chem

View full text Add to dashboard Cite

We report the formation of the azide anion (N−3) in the gas phase by dissociative electron attachment to benzyl azide in a beam experiment. The electron photodetachment cross section of N−3, generated analogously in an ion cyclotron resonance (ICR) spectrometer has been measured. A threshold of 2.76 ± 0.04 eV was obtained corresponding to the vertical detachment energy in N−3. Ab initio calculations on N−3 and N3 predict similar geometries for both compounds, indicating that the photodetachment threshold can be equated with the electron affinity of the azide radical.

show abstract

Section: Ab Initio Calculationsmentioning

confidence: 86%

“…The basic instrumentation and method of data collection have been reported [S]. Apart from photodetachment studies the ICR spectrometry has become an important technique in various fields of gas phase ion chemistry [9].…”

Section: Ion Cyclotron Resonance (Icr) Photodetachment Spectroscopymentioning

confidence: 99%

Experimental and Theoretical Investigation of the Azide Anion (N⁻₃) in the Gas Phase

Illenberger¹,

Comita²,

Brauman³

et al. 1985

Ber Bunsenges Phys Chem

View full text Add to dashboard Cite

show abstract

“…For the screened trap, Figure 3 clearly shows that the z-axis trapping potential drops rapidly to near zero as one moves away from the screen toward the center of the trap. Beyond about one mesh diameter away from the screen, the electrostatic potential in the screened trap is about [15][16][17][18][19][20] times smaller than at the corresponding z position in the unscreened orthorhombic trap. Similar results (not shown) apply for a cylindrical trap.…”

Section: Methodsmentioning

confidence: 97%

A "screened" electrostatic ion trap for enhanced mass resolution, mass accuracy, reproducibility, and upper mass limit in Fourier-transform ion cyclotron resonance mass spectrometry

Wang¹,

Marshall²

1989

Anal. Chem.

113

View full text Add to dashboard Cite

Until now, it was thought that the optimal static electromagnetic ion trap for Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry should be designed to produce a quadrupolar electrical potential, for which the ion cyclotron frequency is independent of the ion's preexcitation location within the trap. However, a quadrupolar potential results in a transverse (to the magnetic field) electric field that increases linearly with distance from the center of the trap. That radially linear electric field shifts the observed ICR frequency, increases the ICR orbital radius, and ultimately limits the highest mass-to-charge ratio ion that can be contained within the trap. In this paper, we propose a new static electromagnetic ion "trap" in which grounded screens placed just inside the usual "trapping" plates produce a good approximation to a "particle-in-a-box" potential (rather than the quadrupolar "harmonic oscillator" potential). SIMION calculations confirm that the electric potential of the screened trap is near zero almost everywhere within the trap. For our screened orthorhombic (2.5 in. X 2 in. X 2 in.) trap, the experimental ICR frequency shift due to trapping voltage is reduced by a factor of approximately 100, and the experimental variation of ICR frequency with ICR radius is reduced by a factor of approximately 10 compared to a conventional (unscreened) 2-in. cubic ion trap.(ABSTRACT TRUNCATED AT 250 WORDS)

show abstract

“…FTICR (Wanczek, 1984;Buchanan, 1987;Wilkins et al, 1989;Dienes et al, 1996;Marshall, Hendrickson, & Jackson, 1998) is performed by trapping ions in an analyzer cell composed of electrically conductive walls placed in a homogenous region of a magnet (Comisarow & Marshall, 1974a,b;Grosshans & Marshall, 1990). Detection is performed by exciting all the ions nearly simultaneously (depending on the excitation method, e.g., chirp versus impulse) and coherently to the same cyclotron radius (Schweikhard & Marshall, 1993).…”

Section: A Fourier Transform Ion Cyclotron Resonance Mass Spectrometrymentioning

confidence: 99%

Application of Fourier transform ion cyclotron resonance mass spectrometry to oligosaccharides

Park

Lebrilla

2004

Mass Spectrometry Reviews

143

108

View full text Add to dashboard Cite

The application of Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) to the structural elucidation of oligosaccharides is described. This review covers the analyses of oligosaccharides in the context of the unique features of FTICR MS and the improvements in instrumentation that make it possible to study this class of compounds. It consists of work performed initially to understand the fundamental aspects of oligosaccharide ionization and unimolecular fragmentation. More recent investigation includes the application of the technique to samples of direct biological origin. Chemical and enzymatic degradation methods in conjunction with mass spectrometry (MS) and the use front-end methods with FTICR MS are also discussed. The current applications including the characterization of bacterial lipooligosaccharides and phosporylated carbohydrates are described.

show abstract

Ion cyclotron resonance spectrometry - a review

Cited by 77 publications

References 220 publications

Experimental and Theoretical Investigation of the Azide Anion (N⁻₃) in the Gas Phase

Experimental and Theoretical Investigation of the Azide Anion (N⁻₃) in the Gas Phase

A "screened" electrostatic ion trap for enhanced mass resolution, mass accuracy, reproducibility, and upper mass limit in Fourier-transform ion cyclotron resonance mass spectrometry

Application of Fourier transform ion cyclotron resonance mass spectrometry to oligosaccharides

Contact Info

Product

Resources

About

Ion cyclotron resonance spectrometry - a review

Cited by 77 publications

References 220 publications

Experimental and Theoretical Investigation of the Azide Anion (N−3) in the Gas Phase

Experimental and Theoretical Investigation of the Azide Anion (N−3) in the Gas Phase

A "screened" electrostatic ion trap for enhanced mass resolution, mass accuracy, reproducibility, and upper mass limit in Fourier-transform ion cyclotron resonance mass spectrometry

Application of Fourier transform ion cyclotron resonance mass spectrometry to oligosaccharides

Contact Info

Product

Resources

About

Experimental and Theoretical Investigation of the Azide Anion (N⁻₃) in the Gas Phase

Experimental and Theoretical Investigation of the Azide Anion (N⁻₃) in the Gas Phase