Evidence map›Paper›PMID 24678803›Full record

ArticleAnalytical chemistry2014

Structural characterization of methylenedianiline regioisomers by ion mobility-mass spectrometry, tandem mass spectrometry, and computational strategies: I. Electrospray spectra of 2-ring isomers.

Jay G Forsythe, Sarah M Stow, Hartmut Nefzger, Nicholas W Kwiecien, Jody C May, John A McLean, David M Hercules

Open access · bronzeAbstract read
In one paragraph

Article in Analytical chemistry, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.8field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed, 29 citations in OpenAlex.

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  12. Review
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  15. Gated Trapped Ion Mobility Spectrometry Coupled to Fourier Transform Ion Cyclotron Resonance Mass Spectrometry.International journal for ion mobility spectrometry : official publication of the International Society for Ion Mobility Spectrometry · 2016
    Article
  16. Article
  17. Fundamentals of trapped ion mobility spectrometry.Journal of the American Society for Mass Spectrometry · 2015
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Jay G ForsytheDepartment of Chemistry, Vanderbilt University , Nashville, Tennessee 37235, United States.
Sarah M Stow
Hartmut Nefzger
Nicholas W Kwiecien
Jody C May
John A McLean
David M Hercules
Vanderbilt University · USBayer (Germany) · DE

Funding

Neurovascular Unit on a Chip: Regional Chemical Communication, Drug and Toxin ResponsesUH3TR000491 · NCATS · VANDERBILT UNIVERSITY · PI GHOSH, CHAITALI, JANIGRO, DAMIR · 2014 to 2016
$3.8M
Neurovascular Unit on a Chip: Chemical Communication, Drug and Toxin ResponsesUH2TR000491 · NCATS · VANDERBILT UNIVERSITY · PI JANIGRO, DAMIR, NISWENDER, KEVIN D · 2012 to 2013
$2.2M
ACQUISITION OF A 500 MHZ LC-NMR: PEPTIDE CHEMISTRYS10RR019022 · NCRR · VANDERBILT UNIVERSITY · PI RIZZO, CARMELO J · 2005 to 2005
$500k
NCATS NIH HHS UH2 TR000491NCATS NIH HHS UH3 TR000491NCRR NIH HHS S10 RR019022
6 · The paper itself

Abstract

Purified methylenedianiline (MDA) regioisomers were structurally characterized and differentiated using tandem mass spectrometry (MS/MS), ion mobility-mass spectrometry (IM-MS), and IM-MS/MS in conjunction with computational methods. It was determined that protonation sites on the isomers can vary depending on the position of amino groups, and the resulting protonation sites play a role in the gas-phase stability of the isomer. We also observed differences in the relative distributions of protonated conformations depending on experimental conditions and instrumentation, which is consistent with previous studies on aniline in the gas phase. This work demonstrates the utility of a multifaceted approach for the study of isobaric species and elucidates why previous MDA studies may have been unable to detect and/or differentiate certain isomers. Such analysis may prove useful in the characterization of larger MDA multimeric species, industrial MDA mixtures, and methylene diphenyl diisocyanate (MDI) mixtures used in polyurethane synthesis.

Identifiers

PMID24678803
PMCPMC4014176
OpenAlexW4242987693

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.