Segmented fourier transform and its application to fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry: ion abundances and mass measurements

Koning, Leo J. de; Kort, C. W. F.; Pinkse, Frans A.; Nibbering, Nico M. M.

doi:10.1016/0168-1176(89)83047-2

Cited by 44 publications

(34 citation statements)

References 45 publications

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“…The experiments were performed with a Fourier transform ion cyclotron resonance (FT-ICR) [31] instrument designed and constructed at the University of Amsterdam [32][33][34]. In a typical experiment, the primary negative ions were formed by a pulsed electron beam (duration 150 ms) and trapped in a magnetic field of 1.23 T by applying a small negative voltage (~ -1 V) to the trapping plates of the cubic inch FT-ICR cell.…”

Section: Methodsmentioning

confidence: 99%

“…The reactions of the various ions with the halogenated methanes were studied subsequently as a function of time by varying the delay between the selection of the ions of interest and the start of the excitation pulse [31]. The relative abundances of the isotopic chloride containing product ions were _~ measured with an accuracy of ~< 5% by following procedures described elsewhere [33,41,43].…”

Section: Methodsmentioning

confidence: 99%

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Formation, stability and structure of radical anions of chloroform, tetrachloromethane and fluorotrichloromethane in the gas phase

Staneke

Groothuis

Ingemann

et al. 1995

International Journal of Mass Spectrometry and Ion Processes

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UvA-DARE is a service provided by the library of the University of Amsterdam (http://dare.uva.nl) UvA-DARE (Digital Academic Repository)Formation, stability and structure of radical anions of chloroform, tetrachloromethane and fluorotrichloromethane in the gas phase Staneke, P.O.; Groothuis, G.; Ingemann Jorgensen, S.; Nibbering, N.M.M. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractThe gas-phase reactions of the CH2S'-radical anion with chloroform, tetrachloromethane, and fluorotrichloromethane (CXC13; X = H, D, C1 and F) have been studied using Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. The primary reactions lead to minor amounts of the molecular radical anions of the halomethanes in addition to CHzSC1-and CI-, which are formed as the major product ions. The initial step is suggested to be electron transfer with formation of a [CHzS q-CXCI;-] ion/molecule complex, which may dissociate to the radical anion of the halomethane or react further to yield a [CH2S + C1-+ CXC1½-] complex prior to the generation of the C1-or CH2SC1-ions. The radical anions of CHC13 and CC14 react with the parent compounds to yield CHC14 and CCI;-ions, respectively, whereas CFClj transfer a C1 ion only to the CHsSH molecules also present in the FT-ICR cell. On the basis of the facile occurrence of CI-transfer, the CXCIs-ions are proposed to exist in a structure which can be described as a chloride ion weakly bonded to a CXCI2 radical. The formation of the CXCIs-ions in the reaction with the CHzS'-radical anion places a lower limit of 45kJmo1-1 for the electron affinities of the CXC13 molecules. The occurrence of CI-transfer from the CHCI~ ion to the parent compound leads to an indicated upper limit of 75 kJmo1-1 for the electron affinity of chloroform. Similarly, the occurrence of C1-transfer from the CC1U ion to the parent compound is used to derive an upper limit of 110 kJ mol 1 for the electron affinity of tetrachloromethane. These upper limits suggest that previously reported values overestimate the electron affinities of chloroform and tetrachloromethane.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Formation, stability and structure of radical anions of chloroform, tetrachloromethane and fluorotrichloromethane in the gas phase

Staneke

Groothuis

Ingemann

et al. 1995

International Journal of Mass Spectrometry and Ion Processes

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“…The experimental operating procedure of this instrument has been outlined elsewhere [25,26]. The O-ions were generated from N20 by dissociahve capture of electrons with an energy of 1.0-1.5 eV.…”

Section: Methodsmentioning

confidence: 99%

Formation and characterization of the sulfur-containing distonic radical anion, , in the gas phase, in the gas phase

Born

Ingemann

Nibbering

1995

J. Am. Soc. Mass Spectrom.

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Formation and characterization of the sulfur-containing distonic radical anion,E.CH2-S-E-CHCN, in the gas phase Born, M.; Ingemann Jorgensen, S.; Nibbering, N.M.M. Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. The reactions of the atomic oxygen radical anion O-with CH3--S--CH2--CN m the gas phase have been examined with Fourier transform ion cyclotron resonance in combination with tandem mass spectrometric experiments performed with a double-focusmg quadrupole hybrid mstrument. Deuterium labelmg has revealed that the O-ion reacts with CH3--S--CH2--CN by proton abstraction from the methylene group as well as by competing 1,1-and 1,3-H~ abstractions to afford isomeric radical anions. High kinetic energy (8 keV) collision-induced charge reversal experiments mdicate that the 1,1-H~-'-abstraction leads to a CHB--S--C'--CN carbene ion, whereas the 1,3-H~ abstraction yields a novel sulfur-containing distomc radical anion, wt'uch is formulated as "CH2--S--CH--CN. (J Am Soc Mass Spectrom 1995, 6, 71-75)

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“…[23][24][25] De Koning et al have shown that, under certain conditions, rate constants based on peak heights may be overestimated by up to 300%. 24 They advocated the use of segmented Fourier transform (SEFT), as well as the use of corrected excitation waveforms, to overcome these problems, but these excitation and signal processing techniques are not implemented in standard FT-ICR software. Concerning the signal intensity, the theory predicts that for a well-resolved peak, the magnitude-mode peak area is directly proportional to the number of ions.…”

Section: Instrumentation and Experimental Designmentioning

confidence: 99%

Reliability of Fourier transform-ion cyclotron resonance determinations of rate constants for ion/molecule reactions

Grover¹,

Decouzon²,

Maria³

et al. 1996

Eur. J. Mass Spectrom.

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The results of gas-phase rate constant measurements by Fourier transform-ion cyclotron resonance (FT-ICR) mass spectrometry may be influenced by the setting of instrumental parameters. The effects of pressure, ionization duration, ionization energy, selection of the parent ion, mass range, trapping potential, reaction delay and pumping-regulation-valve opening have been investigated and analysed using a two-level Plackett-Burman statistical design which is described in an appendix. This approach was tested on the ion/molecule reaction between acetyl ion and acetone: CH 3 CO + + CH 3 COCH 3 → CH 2 CO + (CH 3 COCH 3 )H + . Although space-charge effects are known to be deleterious to FT-ICR, this is the first study demonstrating, on a statistical basis, the necessity of parent ion selection for obtaining reliable rate constants. Considered independently, the other factors tested do not appear statistically significant, but the possibility of interactions among them is discussed. The mean of the rate constants from experiments with acetyl ion selection, k abs = (2.14 ± 0.18) × 10 -10 cm 3 molecule -1 s -1 , is compared with literature data.

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Segmented fourier transform and its application to fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry: ion abundances and mass measurements

Cited by 44 publications

References 45 publications

Formation, stability and structure of radical anions of chloroform, tetrachloromethane and fluorotrichloromethane in the gas phase

Formation, stability and structure of radical anions of chloroform, tetrachloromethane and fluorotrichloromethane in the gas phase

Formation and characterization of the sulfur-containing distonic radical anion, , in the gas phase, in the gas phase

Reliability of Fourier transform-ion cyclotron resonance determinations of rate constants for ion/molecule reactions

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