Электронный каталог

Статья

Wilson, J.M.
Online Gas-Adsorption Chromatography with Tl on Fused Silica for Next-Generation Chemistry Experiments with Nh / J.M.Wilson, N.V.Aksenov, Y.A.Albin, A.Yu.Bodrov, G.A.Bozhikov, V.I.Chepigin, I.Chuprakov, S.N.Dmitriev, N.S.Gustova, A.V.Isaev, A.S.Madumarov, O.N.Malyshev, E.V.Melnik, Yu.A.Popov, A.V.Sabelnikov, A.I.Svirikhin, M.G.Voronuk, A.V.Yeremin, [a.o.]. – Text : electronic // Inorganic Chemistry. – 2025. – Vol. 64, No. 49. – P. 23810–23824. – URL: https://doi.org/10.1021/acs.inorgchem.5c02244. – Bibliogr.: 9.

Presented here are comprehensive online gas adsorption chromatography experiments with thallium on fused silica surfaces toward an unambiguous chemical characterization of nihonium (Nh, Z = 113). Short-lived *1*8*4Tl (t&sub(1/2) = 10.1 ± 5 s), produced in the nuclear fusion-evaporation reaction *1*4*1Pr(*4*8Ti, 5n)*1*8*4Tl, was velocity-separated and introduced into the chemistry setup mounted in the focal plane of the separator. Isothermal gas adsorption chromatography experiments with a fused silica stationary phase at different dehydroxylation stages revealed a strong influence on the yield of transported Tl species. The evaluated adsorption enthalpies of the presumed monohydroxide TlOH of – ΔH&sub(ads)&sup(d-SiO2)(TlOH) = 127 ± 3 kJ/mol (dehydroxylated SiO&sub(2)) and −ΔH&sub(ads)&sup(h-SiO2)(TlOH) = 132 ± 12 kJ/mol (hydroxylated SiO&sub(2)) agree well with earlier offline experiments. In the case of a dehydroxylated stationary phase, the chemical speciation of Tl shifted from TlOH to less volatile species TlX2 with −ΔH&sub(ads)&sup(d-SiO2)(TlX2) ≥ 197 kJ/mol. The presented findings highlight the central role of the fused silica stationary phase in order to promote the formation of a defined chemical species of heavy Group 13 elements Tl and potentially Nh. The outcome is compared to state-of-the-art theoretical predictions.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 44 д - Использование газовой хроматографии для аналитических целей
Бюллетени = 14/026