Field ionization at a surface modified by chemically bound carboxylic acid groups

Youngless, Tim L.; Bursey, Maurice M.; Pedersen, Lee G.

doi:10.1016/0020-7381(81)80069-1

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…The existence of a threshold for protonation is concordant with the endothermicity of the protonation reaction at zero field. It also has been universally observed with acid-surface metal emitters (1,2) and although the onset of protonation varies with the geometry of each emitter to some extent, the threshold is lower for carbon than for cobalt emitters. This is a manifestation of the lower temperature of a cobalt emitter than a carbon emitter when the same heating current is passed through two otherwise identical emitters (19).…”

Section: Resultsmentioning

confidence: 77%

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Silanized carbon microneedle emitters for chemical/field ionization

Fraley¹,

Bursey²

1981

Anal. Chem.

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Section: Resultsmentioning

confidence: 77%

“…The reactions chosen to provide a protonating surface on carbon emitters are analogous to those recommended for cobalt emitters (2). In the context of involatilization through polymer formation, the chemistry may be formalized by reference to eq 2, in which the R group is -CH2CH2CH2NHCH2CH2NH2.…”

Section: Resultsmentioning

confidence: 99%

Silanized carbon microneedle emitters for chemical/field ionization

Fraley¹,

Bursey²

1981

Anal. Chem.

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Field desorption mass spectrometry: Applications

Wood

1982

Mass Spectrometry Reviews

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Anionization of volatile molecules on the surface of electrolytic solutions exposed to high electric fields

Ott

Röllgen

Dähling

et al. 1981

Org. Mass Spectrom.

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The anionization of molecules supplied from the gas phase onto a negatively charged [a]-or [NO,]-ion donating surface has been investigated. The charged surface was prepared by exposing an aqueous solution of LiCl (or Lf103) and polyethylene oxide to a high external field as is done in negative ion field desorption mass spectrometry. The ionization of some monosaccharides and adenosine by [Cll-and [NO,]-attachment and of some acids by proton abstraction is reported. INTRODWCTIONCationization of volatile molecules has been achieved on field anodes covered with salts, acids or electrolytic solutions by a1 kali ion14 and proton a t t a~h m e n t .~.~ The molecules are supplied via the gas phase onto the anode surface and the attachment reactions result from a field induced charging of the ion conducting surface layer with loosely bound alkali ions or protons. The field strengths required for these heterogeneous ion/molecule reactions are below the threshold for field ionization (FI) of organic molecules. The physical state of the surface layer is almost the same as that of a charged sample layer from which alkali ions or Ion formation by [CI'J-attachment on a negatively charged surface of an aqueous solution of PEO and LiCl was investigated first with a number of smaller

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Field ionization at a surface modified by chemically bound carboxylic acid groups

Cited by 4 publications

References 11 publications

Silanized carbon microneedle emitters for chemical/field ionization

Silanized carbon microneedle emitters for chemical/field ionization

Field desorption mass spectrometry: Applications

Anionization of volatile molecules on the surface of electrolytic solutions exposed to high electric fields

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