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Pressing of Functionalized Polymer Composite Materials to Improve Mössbauer Measurement Signals

Authors :
Justus Pawlak
Jules Brehme
Maximilian Seydi Kilic
Kevin Tran
Justin Koch
Mohammad Beyki
Ralf Sindelar
Robert Patzke
Franz Renz
Source :
Polymers, Vol 16, Iss 10, p 1311 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

Coordination compounds, like iron(II) triazole complexes, exhibit spin crossover (SCO) behavior at around room temperature. Therefore, they are interesting for a variety of possible applications, and it is convenient to integrate them into polymers. Due to a reduction of the iron content and thus also 57Fe content in the sample through integration in polymers, Mössbauer measurements are only possible with greater difficulty or very long measurement times without expensive enrichment of the samples with 57Fe. So, other ways of improving the Mössbauer signal for these composite materials are necessary. Therefore, we pressed these composite materials to improve the Mössbauer spectra. In this study, we synthesized an iron(II) triazole spin crossover complex and an electrospun polymer complex composite nanofiber material including the same complex. For both products, Mössbauer measurements were performed at room temperature before and after using a press to show that the complex composite is not harmed through pressing. We investigate the influence of the pressing impact on the Mössbauer measurements in the context of measurement statistics and the measured signals. We show that pressing is not connected to any changes in the sample regarding the spin and oxidation state. We present that pressing improves the statistics of the Mössbauer measurements significantly. Furthermore, we use SEM measurements and PXRD to investigate whether or not the obtained fiber mats are destroyed in the pressing process.

Details

Language :
English
ISSN :
20734360
Volume :
16
Issue :
10
Database :
Directory of Open Access Journals
Journal :
Polymers
Publication Type :
Academic Journal
Accession number :
edsdoj.73b80a19864b1aa2a51444e3da0cbc
Document Type :
article
Full Text :
https://doi.org/10.3390/polym16101311