Synthesis of isotopically enriched germanium‑72 tetrachloride 72GeCl4

Vitalii A. Koshkin; Andrey D. Bulanov; Oleg Yu. Troshin; Artem Yu. Lashkov; Andrey Yu. Sozin; Artur A. Ermakov

doi:10.17308/kcmf.2026.28/13684

Authors

Vitalii A. Koshkin G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation
Andrey D. Bulanov Lobachevsky State University of Nizhny Novgorod (National Research University), 23, Gagarin av., Nizhny Novgorod 603950, Russian Federation , G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation
Oleg Yu. Troshin Lobachevsky State University of Nizhny Novgorod (National Research University), 23, Gagarin av., Nizhny Novgorod 603950, Russian Federation , G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation
Artem Yu. Lashkov G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation
Andrey Yu. Sozin Lobachevsky State University of Nizhny Novgorod (National Research University), 23, Gagarin av., Nizhny Novgorod 603950, Russian Federation , G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation
Artur A. Ermakov G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation

DOI:

https://doi.org/10.17308/kcmf.2026.28/13684

Keywords:

Isotopes, Germanium, Chlorine, High-purity substances, Chlorination

Abstract

Objective: Development and evaluation of a laboratory method for the synthesis of⁷²GeCl₄ from isotopically enriched germanium72Ge and chlorine.

Experimental: A method for producing high-purity⁷²GeCl₄ has been developed, involving synthesis from elemental starting materials followed by distillative purification. The practical yield of germanium‑72 tetrachloride was 90%. The molecular impurity profile and the isotopic composition of germanium in the obtained⁷²GeCl₄ were characterized by gas chromatography, mass spectrometry, and IR spectroscopy. The content of molecular impurities (permanent gases, halogen derivatives of alkanes, and silicon) in⁷²GeCl₄ is at the level of ~10–3 to 10–6 vol. %. The enrichment level of the main⁷²Ge isotope is 99.75221 ± 0.00300 at. %.

Conclusions: The developed laboratory method for synthesizing⁷²GeCl₄ from isotopically enriched⁷²Ge allows for the production of⁷²GeCl₄ with high yield, preservation of the enrichment level for the main⁷²Ge isotope, and high chemical purity

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Author Biographies

Vitalii A. Koshkin, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation

Junior Research Scientist, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences (Nizhny Novgorod, Russian Federation)
Andrey D. Bulanov, Lobachevsky State University of Nizhny Novgorod (National Research University), 23, Gagarin av., Nizhny Novgorod 603950, Russian Federation, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation

Corresponding Member of the Russian Academy of Sciences, Dr. Sci. (Chemistry), Chief Research Scientist, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences (Nizhny Novgorod, Russian Federation)
Oleg Yu. Troshin, Lobachevsky State University of Nizhny Novgorod (National Research University), 23, Gagarin av., Nizhny Novgorod 603950, Russian Federation, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation

Cand. Sci. (Chem.), Senior Research Scientist, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences (Nizhny Novgorod, Russian Federation)
Artem Yu. Lashkov, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation

Cand. Sci. (Chem.), Senior Research Scientist, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences (Nizhny Novgorod, Russian Federation)
Andrey Yu. Sozin, Lobachevsky State University of Nizhny Novgorod (National Research University), 23, Gagarin av., Nizhny Novgorod 603950, Russian Federation, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation

Dr. Sci. (Chem.), Senior Research Scientist, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences (Nizhny Novgorod, Russian Federation)
Artur A. Ermakov, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, 49, Tropinina st., Nizhny Novgorod 603137, Russian Federation

Junior Research Scientist, G. G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences (Nizhny Novgorod, Russian Federation)

References

1. Troshin O. Yu., Gavva V. A., Lashkov A. Yu. Isotope-enriched silicon, germanium, and their hydrides for the development of quantum computing devices*. Inorganic Materials. 2023;59(11): 1201–1210. https://doi.org/10.31857/S0002337X23110143

2. Hutchins-Delgado T., Miller A., Scott R. Characterization of shallow, undoped Ge/SiGe quantum wells commercially grown on 8-in. (100) Si wafers. ACS Applied Electronic Materials. 2022;4(9): 4482–4489. https://doi.org/10.1021/acsaelm.2c00733

3. Lai M., Wei L., Lin M. Dopant-assisted crystallization enables germanium quantum dots with enhanced product yields and optoelectronic properties. Journal of the American Chemical Society. 2025;147(10): 8125–8131. https://doi.org/10.1021/jacs.5c00423

4. Allan D. C., Brown J. T., Сhacon L. C. Isotopically altered optical fiber. Patent USA: No. 20030128955. Publ. 10.07.2003.

5. Brown T. G., Painter B. A. Low loss isotopic optical waveguides. Patent USA: No. 2003/0002834. Publ. 02.01.2003.

6. Plekhanov V. G. Isotope engineering. Physics-Uspekhi. 2000;43(11): 1147–1154. https://doi.org/10.1070/pu2000v043n11abeh000264

7. Troshin O. Yu., Bulanov A. D., Salgansky M. Yu., … Drozdov M. N. 28SiO2-based isotopically enriched silica fiber. Inorganic Materials. 2023;59(6): 591–596. https://doi.org/10.1134/s0020168523060158

8. Furman A. A. Inorganic chlorides (chemistry and technology)*. Moscow: Ximiya Publ., 1980. 416 p. (In Russ.)

9. Bulanov A. D., Gavva V. A., Troshin O. Yu. Features of synthesis and properties of new materials based on monoisotopic silicon and germanium. Review. Condensed Matter and Interphases. 2025;27(1): 3–15. https://doi.org/10.17308/kcmf.2025.27/12483

10. Rare and trace elements. Chemistry and technology*. Book 3: textbook / S. S. Korovin, V. I. Bukin, P. I. Fedorov, A. M. Reznik (eds.). Moscow: "MISiS" Publ., 2003. 440 p.

11. Churbanov M. F., Bulanov A. D., Troshin O. Yu. Method for producing isotopically enriched silicon tetrachloride. Patent RF: RU 2618265 C1, IPC C01B 33/08. Publ. 03.05.2017. Available at: https://www.elibrary.ru/item.asp?id=38263604

12. Potapov A. M., Kurganova A. E., Bulanov A. D., Troshin O. Yu., Zyryanov S. M. Isotope analysis of 72GeH4, 73GeH4, 74GeH4, and 76GeH4 monogermanes by inductively-coupled plasma high-resolution mass spectrometry (ICP–MS). Journal of Analytical Chemistry. 2016;71(7): 667–675. https://doi.org/10.1134/S1061934816050087

13. Lindeman L., Wilson M. Infra-red spectra of GeCl4, GeHCl3, and GeDCl3. Spectrochim Acta. 1957;9(1): 47–50. https://doi.org/10.1016/0371-1951(57)80120-9

14. Thomas T., Orville-Thomas W. The i.r. spectra and structure of XY4 molecules (X = Ge, Sn; Y = Cl, Br). Journal of Inorganic and Nuclear Chemistry. 1972;34(3): 839–845. https://doi.org/10.1016/0022-1902(72)80057-5