Reactivity and volatility of astatine in a quartz column

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F25%3A00640541" target="_blank" >RIV/61389005:_____/25:00640541 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/25:00387377

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s10967-025-10335-4" target="_blank" >https://link.springer.com/article/10.1007/s10967-025-10335-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10967-025-10335-4" target="_blank" >10.1007/s10967-025-10335-4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Reactivity and volatility of astatine in a quartz column

Popis výsledku v původním jazyce

Astatine (At, Z = 85) is the rarest naturally occurring element and exhibits unique chemical properties influenced by relativistic effects. The short half-lives of its isotopes and its scarcity limits chemical experiments and methods to study and work with astatine. While some insight has been gained into its behavior in the liquid phase, substantial experimental challenges persist, and studies of its gas-phase chemistry remain scarce. Understanding its reactivity and volatility is important not only for optimizing the use of At in targeted alpha therapy but also a crucial step towards future investigations of its superheavy homolog, tennessine (Ts, Z = 117). Adsorption and interaction of At with a quartz surface were studied aiming at a conclusive understanding of the interaction strength between At and fused silica surfaces of different reactivity. In our work, the isotopes 207,208At (T1/2 = 1.63 h and T1/2 = 1.81 h, respectively) were produced via fusion-evaporation reactions by irradiating Bi2O3-targets with 3He beams. We used gas-solid thermochromatography in various gas atmospheres and applied several temperature gradients ranging from Tmax = 1000 degrees C to Tmin = - 170 degrees C. Silica surfaces with different degrees of hydroxylation were used. These experiments reveal the concentration of the hydroxyl groups on the surface, i.e. its reactivity, to play an important role in the chemical interaction of At with hot quartz surfaces. Advanced Monte Carlo simulations allowed determining the adsorption enthalpies of the At species, and thus, to elucidate the chemical interactions of At with quartz surfaces. The use of different carrier gases as well as surfaces of different reactivity allowed the production and observation of multiple chemical species. We assigned the most volatile species to elemental At, which was found to be chemically bound to the hydroxylated silica surface at temperatures between 300 and 500 degrees C.

Název v anglickém jazyce

Reactivity and volatility of astatine in a quartz column

Popis výsledku anglicky

Astatine (At, Z = 85) is the rarest naturally occurring element and exhibits unique chemical properties influenced by relativistic effects. The short half-lives of its isotopes and its scarcity limits chemical experiments and methods to study and work with astatine. While some insight has been gained into its behavior in the liquid phase, substantial experimental challenges persist, and studies of its gas-phase chemistry remain scarce. Understanding its reactivity and volatility is important not only for optimizing the use of At in targeted alpha therapy but also a crucial step towards future investigations of its superheavy homolog, tennessine (Ts, Z = 117). Adsorption and interaction of At with a quartz surface were studied aiming at a conclusive understanding of the interaction strength between At and fused silica surfaces of different reactivity. In our work, the isotopes 207,208At (T1/2 = 1.63 h and T1/2 = 1.81 h, respectively) were produced via fusion-evaporation reactions by irradiating Bi2O3-targets with 3He beams. We used gas-solid thermochromatography in various gas atmospheres and applied several temperature gradients ranging from Tmax = 1000 degrees C to Tmin = - 170 degrees C. Silica surfaces with different degrees of hydroxylation were used. These experiments reveal the concentration of the hydroxyl groups on the surface, i.e. its reactivity, to play an important role in the chemical interaction of At with hot quartz surfaces. Advanced Monte Carlo simulations allowed determining the adsorption enthalpies of the At species, and thus, to elucidate the chemical interactions of At with quartz surfaces. The use of different carrier gases as well as surfaces of different reactivity allowed the production and observation of multiple chemical species. We assigned the most volatile species to elemental At, which was found to be chemically bound to the hydroxylated silica surface at temperatures between 300 and 500 degrees C.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Radioanalytical and Nuclear Chemistry

ISSN

0236-5731

e-ISSN

1588-2780

Svazek periodika

334

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

6959-6972

Kód UT WoS článku

001577692000001

EID výsledku v databázi Scopus

2-s2.0-105017029420