Experimental study of Cu(en)(H2O)2SO4 embedded into mesoporous silica matrix SBA-15 with the hexagonal arrangement of pores

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43934034" target="_blank" >RIV/60461373:22310/23:43934034 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jmmm.2023.171396" target="_blank" >https://doi.org/10.1016/j.jmmm.2023.171396</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2023.171396" target="_blank" >10.1016/j.jmmm.2023.171396</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental study of Cu(en)(H2O)2SO4 embedded into mesoporous silica matrix SBA-15 with the hexagonal arrangement of pores

Popis výsledku v původním jazyce

In this work, we present an experimental study to find the optimal way of encapsulation of the magnetic quasi-two-dimensional system Cu(en)(H2O)2SO4 (en = ethylenediamine = C2H8N2) in mesoporous silica SBA-15 with hexagonal pore morphology with a pore size of 5 nm. Our main goal is to achieve the most significant possible degree of pore filling and to study the effect of encapsulation of complex Cu(en)(H2O)2SO4 in SBA-15 silica on the magnetic properties of the studied complex by means of electron paramagnetic resonance (EPR) and magnetization measurements. It was found that the adsorption equilibrium during the adsorption of the Cu(en)(H2O)2SO4 complex from the solution to SBA-15 was reached after only 24 h, and the samples prepared by adsorption for a longer time (72 h, 14 days) did not show an increased amount of the loaded complex. The degree of pore filling represents around 60 % of the total volume of internal pores. The analysis of temperature dependence of susceptibility, the field dependence of magnetization, and EPR spectra showed that due to the encapsulation of Cu(en)(H2O)2SO4 complex in mesoporous silica, the magnetic correlations between Cu(II) ions are significantly weakened, yielding paramagnetic behavior in the studied system. © 2023 Elsevier B.V.

Název v anglickém jazyce

Experimental study of Cu(en)(H2O)2SO4 embedded into mesoporous silica matrix SBA-15 with the hexagonal arrangement of pores

Popis výsledku anglicky

In this work, we present an experimental study to find the optimal way of encapsulation of the magnetic quasi-two-dimensional system Cu(en)(H2O)2SO4 (en = ethylenediamine = C2H8N2) in mesoporous silica SBA-15 with hexagonal pore morphology with a pore size of 5 nm. Our main goal is to achieve the most significant possible degree of pore filling and to study the effect of encapsulation of complex Cu(en)(H2O)2SO4 in SBA-15 silica on the magnetic properties of the studied complex by means of electron paramagnetic resonance (EPR) and magnetization measurements. It was found that the adsorption equilibrium during the adsorption of the Cu(en)(H2O)2SO4 complex from the solution to SBA-15 was reached after only 24 h, and the samples prepared by adsorption for a longer time (72 h, 14 days) did not show an increased amount of the loaded complex. The degree of pore filling represents around 60 % of the total volume of internal pores. The analysis of temperature dependence of susceptibility, the field dependence of magnetization, and EPR spectra showed that due to the encapsulation of Cu(en)(H2O)2SO4 complex in mesoporous silica, the magnetic correlations between Cu(II) ions are significantly weakened, yielding paramagnetic behavior in the studied system. © 2023 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA21-02550S" target="_blank" >GA21-02550S: Plazmonem indukované zachycení excitovaného spinového stavu v komplexech se spinovým krosoverem</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

ISSN

0304-8853

e-ISSN

—

Svazek periodika

588

Číslo periodika v rámci svazku

DEC 15 2023

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

"171396/1"-6

Kód UT WoS článku

001149874400001

EID výsledku v databázi Scopus

2-s2.0-85174627688