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Examining iron complexes with organic ligands by laboratory XAFS.

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Title: Examining iron complexes with organic ligands by laboratory XAFS.
Authors: Motz, Damian1 (AUTHOR) d.a.motz@baustoff.uni-hannover.de, Praetz, Sebastian2 (AUTHOR), Schlesiger, Christopher2 (AUTHOR), Henniges, Jonathan1 (AUTHOR), Böttcher, Florian1 (AUTHOR), Hesse, Bernhard3 (AUTHOR), Castillo-Michel, Hiram3 (AUTHOR), Mijatz, Steven1 (AUTHOR), Malzer, Wolfgang2 (AUTHOR), Kanngießer, Birgit2 (AUTHOR), Vogt, Carla1 (AUTHOR)
Source: JAAS (Journal of Analytical Atomic Spectrometry). Feb2023, Vol. 38 Issue 2, p391-402. 12p.
Subjects: Iron, Iron compounds, Coordinate covalent bond, Pyrolytic graphite, Organic compounds, Analytical chemistry
Abstract: This paper presents the application of laboratory X-ray Absorption Fine Structure Spectroscopy (XAFS) in the field of iron coordination chemistry, especially for compounds with larger organic ligands and usually low contents of the metal. The goal was to compare the efficiency of the laboratory setup with the synchrotron setups usually applied for the determination of the oxidation and coordination states of heavier elements and to investigate the limits of the tabletop system for the discrimination of complexes with similar ligands. For the measurement of iron K-edge XANES spectra at the laboratory, an X-ray tube-based spectrometer using the von Hamos geometry with a Highly Annealed Pyrolytic Graphite (HAPG) mosaic crystal optic was used, and synchrotron measurements were performed at the beamline ID21 at the ESRF. Different iron complexes, such as iron(II)-2,6-Bis(benzimidazol-2-yl)pyridine systems, iron(III)-porphyrins and human hemoglobin, have been successfully measured with both setups. With an energy resolving power of about E/ΔE = 4000 around the iron K-edge for the laboratory setup, the results can compete with synchrotron measurements with a Si(111) crystal monochromator and a resolving power of about E/ΔE = 5070. The findings of this work show that laboratory XAFS is also beneficial for applications in coordination chemistry such as the investigation of metal complexes with organic ligands. Thus, the results complement the ongoing continuous developments and improvements of various laboratory XAFS setups with high resolution, moderate measuring times and standardized sample preparation techniques as well as increasing applications in multiple fields of analytical chemistry. These improvements and continuously growing applications will further increase the spread and acceptance of laboratory XAFS. [ABSTRACT FROM AUTHOR]
Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry 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: 161761945
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Examining iron complexes with organic ligands by laboratory XAFS.
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  Data: <searchLink fieldCode="AR" term="%22Motz%2C+Damian%22">Motz, Damian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> d.a.motz@baustoff.uni-hannover.de</i><br /><searchLink fieldCode="AR" term="%22Praetz%2C+Sebastian%22">Praetz, Sebastian</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schlesiger%2C+Christopher%22">Schlesiger, Christopher</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Henniges%2C+Jonathan%22">Henniges, Jonathan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Böttcher%2C+Florian%22">Böttcher, Florian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hesse%2C+Bernhard%22">Hesse, Bernhard</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Castillo-Michel%2C+Hiram%22">Castillo-Michel, Hiram</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mijatz%2C+Steven%22">Mijatz, Steven</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Malzer%2C+Wolfgang%22">Malzer, Wolfgang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kanngießer%2C+Birgit%22">Kanngießer, Birgit</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vogt%2C+Carla%22">Vogt, Carla</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22JAAS+%28Journal+of+Analytical+Atomic+Spectrometry%29%22">JAAS (Journal of Analytical Atomic Spectrometry)</searchLink>. Feb2023, Vol. 38 Issue 2, p391-402. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Iron%22">Iron</searchLink><br /><searchLink fieldCode="DE" term="%22Iron+compounds%22">Iron compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Coordinate+covalent+bond%22">Coordinate covalent bond</searchLink><br /><searchLink fieldCode="DE" term="%22Pyrolytic+graphite%22">Pyrolytic graphite</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+compounds%22">Organic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Analytical+chemistry%22">Analytical chemistry</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper presents the application of laboratory X-ray Absorption Fine Structure Spectroscopy (XAFS) in the field of iron coordination chemistry, especially for compounds with larger organic ligands and usually low contents of the metal. The goal was to compare the efficiency of the laboratory setup with the synchrotron setups usually applied for the determination of the oxidation and coordination states of heavier elements and to investigate the limits of the tabletop system for the discrimination of complexes with similar ligands. For the measurement of iron K-edge XANES spectra at the laboratory, an X-ray tube-based spectrometer using the von Hamos geometry with a Highly Annealed Pyrolytic Graphite (HAPG) mosaic crystal optic was used, and synchrotron measurements were performed at the beamline ID21 at the ESRF. Different iron complexes, such as iron(II)-2,6-Bis(benzimidazol-2-yl)pyridine systems, iron(III)-porphyrins and human hemoglobin, have been successfully measured with both setups. With an energy resolving power of about E/ΔE = 4000 around the iron K-edge for the laboratory setup, the results can compete with synchrotron measurements with a Si(111) crystal monochromator and a resolving power of about E/ΔE = 5070. The findings of this work show that laboratory XAFS is also beneficial for applications in coordination chemistry such as the investigation of metal complexes with organic ligands. Thus, the results complement the ongoing continuous developments and improvements of various laboratory XAFS setups with high resolution, moderate measuring times and standardized sample preparation techniques as well as increasing applications in multiple fields of analytical chemistry. These improvements and continuously growing applications will further increase the spread and acceptance of laboratory XAFS. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of JAAS (Journal of Analytical Atomic Spectrometry) is the property of Royal Society of Chemistry 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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    Identifiers:
      – Type: doi
        Value: 10.1039/d2ja00351a
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 391
    Subjects:
      – SubjectFull: Iron
        Type: general
      – SubjectFull: Iron compounds
        Type: general
      – SubjectFull: Coordinate covalent bond
        Type: general
      – SubjectFull: Pyrolytic graphite
        Type: general
      – SubjectFull: Organic compounds
        Type: general
      – SubjectFull: Analytical chemistry
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      – TitleFull: Examining iron complexes with organic ligands by laboratory XAFS.
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              Text: Feb2023
              Type: published
              Y: 2023
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