Abstract
We present herein the magnetic and Mössbauer investigation of a colorimetric chemical sensor with the chemical formula [Fe(H2btm)2(H2O)2]Cl2 (1) (H2btm = Di(1H-tetrazol-5-yl)methane). The spectra were recorded before and after sensing a series of toxic gases (MeOH, diethylenetriamine, hexylamine, 1,2-diaminocyclohexane, 3-picolylamine, pyridine and furfurylamine). Worth to note that the sensing process (color changes) proceeds at room temperature, does not require any pretreatment and can be detected as well by the naked eyes. 57Fe Mössbauer spectroscopy not only allows to identify the nature of spin states involved in our Fe(II) sensor but also to evaluate quantitatively the respective spin state population, i.e. high spin and low-spin states.
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Acknowledgements
This work was supported through the Fonds De La Recherche Scientifique—FNRS (CDR 33694457, PDR T.0095.21), the Ministère de l’Education et de la Recherche de Roumanie and WBI. L. S. was supported by fellowship from the China Scholarship Council (201804910584). We thank GFSM for supporting participation of L. S. to ICAME 2021 (Brasov, Romania).
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This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2021), 5-10 September 2021, Brasov, Romania.
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Sun, L., Rotaru, A. & Garcia, Y. 57Fe Mössbauer study of an iron(II) sensor for the detection of toxic gases at room temperature. Hyperfine Interact 242, 23 (2021). https://doi.org/10.1007/s10751-021-01754-2
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DOI: https://doi.org/10.1007/s10751-021-01754-2