Carboxylic Groups via Postpolymerization Modification of Polythiophene and their Influence on the Performance of a Polymeric MALDI Matrix Article Swipe
Zhi Qiao
,
K Horatz
,
Po Yuen Ho
,
Andrei Mitrofanov
,
Changjiang Zhou
,
Ningwei Sun
,
Franziska Lissel
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1002/macp.202200250
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1002/macp.202200250
Matrix‐assisted laser desorption/ionization mass spectrometry (MALDI MS) requires a matrix, and traditionally small organic matrices (SOMs) carrying acidic or basic functional groups are used. However, the analyte ionization via secondary processes in the gas‐phase seems to be more important than primary processes. For conjugated polymeric matrices, an even more complicated picture emerges due to their apolar and aprotic nature, high molecular weight, and low tendency to desorb. Poly(3‐dodecylthiophene‐2,5‐diyl) (P3DDT), a good matrix for low‐molecular weight (LMW) analytes, does not give matrix‐related peaks in the LMW area. Here, carboxylic acid (COOH) side‐chains are introduced via postpolymerization modification. The polymers are characterized by NMR, FT‐IR, CV, MALDI MS, and, when possible, GPC. The electron withdrawing side‐chains serve three functions; i) raising the ionization potential (IP), ii) improving the absorption maximum, and iii) acting as a source of protons. When measuring basic amines, this results in the occurrence of additional [Analyte + H + ] + signals compared to polymers without acidic groups, where only radical cations [Analyte] +• are detected. Similarly, estradiol and testosterone, compounds with high IPs, are not detected by polythiophenes without acidic groups, while P3DDT‐COOH enables detection as protonated species.
Related Topics
Concepts
Chemistry
Polythiophene
Desorption
Analyte
Polymer
Matrix-assisted laser desorption/ionization
Carboxylic acid
Protonation
Matrix (chemical analysis)
Mass spectrometry
Conjugated system
Side chain
Polymer chemistry
Combinatorial chemistry
Organic chemistry
Conductive polymer
Chromatography
Adsorption
Ion
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/macp.202200250
- OA Status
- hybrid
- References
- 38
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4313404507
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4313404507Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1002/macp.202200250Digital Object Identifier
- Title
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Carboxylic Groups via Postpolymerization Modification of Polythiophene and their Influence on the Performance of a Polymeric MALDI MatrixWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2022Year of publication
- Publication date
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2022-12-08Full publication date if available
- Authors
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Zhi Qiao, K Horatz, Po Yuen Ho, Andrei Mitrofanov, Changjiang Zhou, Ningwei Sun, Franziska LisselList of authors in order
- Landing page
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https://doi.org/10.1002/macp.202200250Publisher landing page
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://doi.org/10.1002/macp.202200250Direct OA link when available
- Concepts
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Chemistry, Polythiophene, Desorption, Analyte, Polymer, Matrix-assisted laser desorption/ionization, Carboxylic acid, Protonation, Matrix (chemical analysis), Mass spectrometry, Conjugated system, Side chain, Polymer chemistry, Combinatorial chemistry, Organic chemistry, Conductive polymer, Chromatography, Adsorption, IonTop concepts (fields/topics) attached by OpenAlex
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0Total citation count in OpenAlex
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10Other works algorithmically related by OpenAlex
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