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MALDI-TOF analysis of lactide oligomers with functional end groups.

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Title: MALDI-TOF analysis of lactide oligomers with functional end groups.
Authors: Florczak, Marcin1, Michalski, Adam1, Kacprzak, Anna1, Brzeziński, Marek1, Biedroń, Tadeusz1, Pająk, Agnieszka1, Kubisa, Przemysław1, Biela, Tadeusz1 tadek@cbmm.lodz.pl
Source: Reactive & Functional Polymers. Jul2016, Vol. 104, p71-77. 7p.
Subjects: Oligomers, Matrix-assisted laser desorption-ionization, Time-of-flight mass spectroscopy, Lactides, Functional groups, Aminopyridines, Ionic liquids
Abstract: Medium molecular weight polylactides (PLAs) with different end groups were synthesized and analyzed by matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry. Four types of end groups were introduced as head group using appropriate initiators: cationic group [ionic liquid group (IL-PLA-OH)], easily ionizable groups [aminopyridine group (AmPy-PLA-OH) and terpyridine group (TerPy-PLA-OH)], and neutral group [butoxy group (Bu-PLA-OH)]. MALDI-TOF spectra were recorded with various cationizing agents (Li + , Na + , and K + salts). Different modes of ionization were observed depending on the nature of end group. These various modes of ionization lead to different ionization efficiencies, which affect signal intensity. Moreover, analysis of 1/1 mixtures showed that in spectra of mixtures of IL-PLA-OH with either AmPy-PLA-OH or Bu-PLA-OH, only the signals of IL-PLA-OH were detected, while in the spectrum of AmPy-PLA-OH with Bu-PLA-OH, the former gave signals with intensity about one order of magnitude higher than the latter. Such discrimination resulting from different modes and efficiencies of ionization of macromolecules containing structurally different end groups may lead to erroneous conclusions. [ABSTRACT FROM AUTHOR]
Copyright of Reactive & Functional Polymers is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 115918395
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PubTypeId: academicJournal
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  Data: MALDI-TOF analysis of lactide oligomers with functional end groups.
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  Data: <searchLink fieldCode="AR" term="%22Florczak%2C+Marcin%22">Florczak, Marcin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Michalski%2C+Adam%22">Michalski, Adam</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kacprzak%2C+Anna%22">Kacprzak, Anna</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Brzeziński%2C+Marek%22">Brzeziński, Marek</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Biedroń%2C+Tadeusz%22">Biedroń, Tadeusz</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Pająk%2C+Agnieszka%22">Pająk, Agnieszka</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kubisa%2C+Przemysław%22">Kubisa, Przemysław</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Biela%2C+Tadeusz%22">Biela, Tadeusz</searchLink><relatesTo>1</relatesTo><i> tadek@cbmm.lodz.pl</i>
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  Data: <searchLink fieldCode="JN" term="%22Reactive+%26+Functional+Polymers%22">Reactive & Functional Polymers</searchLink>. Jul2016, Vol. 104, p71-77. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Oligomers%22">Oligomers</searchLink><br /><searchLink fieldCode="DE" term="%22Matrix-assisted+laser+desorption-ionization%22">Matrix-assisted laser desorption-ionization</searchLink><br /><searchLink fieldCode="DE" term="%22Time-of-flight+mass+spectroscopy%22">Time-of-flight mass spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Lactides%22">Lactides</searchLink><br /><searchLink fieldCode="DE" term="%22Functional+groups%22">Functional groups</searchLink><br /><searchLink fieldCode="DE" term="%22Aminopyridines%22">Aminopyridines</searchLink><br /><searchLink fieldCode="DE" term="%22Ionic+liquids%22">Ionic liquids</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Medium molecular weight polylactides (PLAs) with different end groups were synthesized and analyzed by matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry. Four types of end groups were introduced as head group using appropriate initiators: cationic group [ionic liquid group (IL-PLA-OH)], easily ionizable groups [aminopyridine group (AmPy-PLA-OH) and terpyridine group (TerPy-PLA-OH)], and neutral group [butoxy group (Bu-PLA-OH)]. MALDI-TOF spectra were recorded with various cationizing agents (Li + , Na + , and K + salts). Different modes of ionization were observed depending on the nature of end group. These various modes of ionization lead to different ionization efficiencies, which affect signal intensity. Moreover, analysis of 1/1 mixtures showed that in spectra of mixtures of IL-PLA-OH with either AmPy-PLA-OH or Bu-PLA-OH, only the signals of IL-PLA-OH were detected, while in the spectrum of AmPy-PLA-OH with Bu-PLA-OH, the former gave signals with intensity about one order of magnitude higher than the latter. Such discrimination resulting from different modes and efficiencies of ionization of macromolecules containing structurally different end groups may lead to erroneous conclusions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Reactive & Functional Polymers is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.reactfunctpolym.2016.05.010
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 7
        StartPage: 71
    Subjects:
      – SubjectFull: Oligomers
        Type: general
      – SubjectFull: Matrix-assisted laser desorption-ionization
        Type: general
      – SubjectFull: Time-of-flight mass spectroscopy
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      – SubjectFull: Lactides
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      – SubjectFull: Functional groups
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      – SubjectFull: Aminopyridines
        Type: general
      – SubjectFull: Ionic liquids
        Type: general
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      – TitleFull: MALDI-TOF analysis of lactide oligomers with functional end groups.
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            NameFull: Florczak, Marcin
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              M: 07
              Text: Jul2016
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              Y: 2016
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              Value: 104
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