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, Yu.V.Albin, A.Yu.Bodrov, G.A.Bozhikov, V.I.Chepigin, I.Chuprakov, S.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. S1-S14. – URL: https://pubs.acs.org/doi/suppl/10.1021/acs.inorgchem.5c02244/suppl_file/ic5c02244_si_001.pdf. – 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 184Tl (t1/2 = 10.1 ± 5 s), produced in the nuclear fusion-evaporation reaction 141Pr(48Ti, 5n)184Tl, 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 – ΔHadsd-SiO2(TlOH) = 127 ± 3 kJ/mol (dehydroxylated SiO2) and −ΔHadsh-SiO2(TlOH) = 132 ± 12 kJ/mol (hydroxylated SiO2) 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 −ΔHadsd-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.