A multifunctional magnetic material based on a solid solution of Fe(II)/Co(II) complexes with a macrocyclic cyclam-based ligand

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F21%3A73609438" target="_blank" >RIV/61989592:15310/21:73609438 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/21:10438708

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2021/DT/D1DT01534F" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2021/DT/D1DT01534F</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d1dt01534f" target="_blank" >10.1039/d1dt01534f</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A multifunctional magnetic material based on a solid solution of Fe(II)/Co(II) complexes with a macrocyclic cyclam-based ligand

Popis výsledku v původním jazyce

In order to prepare a multifunctional magnetic material combining spin crossover together with single-molecular magnetism, co-crystallization of Fe(ii) and Co(ii) complexes of the pyridine derivative of cyclam (Py-2-C = 1,8-bis(pyridin-2-ylmethyl)-1,4,8,11-tetraazacyclotetradecane) was performed. Complexes with the general formula [M-II(Py-2-C)](ClO4)(2)center dot H2O (M-II = Fe (1), Co (2) or Fe0.4Co0.6 (3)) were prepared and thoroughly characterized. Based on X-ray molecular structures, they formed octahedral complexes with cis-arrangement of the coordinated pyridine moieties. Magnetic data revealed that the Fe(ii) complex 1 shows complete SCO with the transition temperature T-1/2 = 141 K, which is preserved also in the mixed Fe/Co system 3 (T-1/2 = 128 K). Co(ii) complex 2 behaves as a field-induced single-molecule magnet as well as the mixed system 3 with a direct and phonon bottleneck relaxation process, respectively. This is the first example of such Fe/Co solid solution providing SCO in combination with field-induced SMM properties. Unfortunately, the light-induced excited spin-state trapping (LIESST) effect was not observed either for the Fe(ii) complex 1 or the mixed system 3 and thus, the effect of SCO on SMM properties at low temperature could not be investigated in detail. Nevertheless, the obtained results clearly document the success of the solid solution methodology for the preparation of multifunctional magnetic materials.

Název v anglickém jazyce

A multifunctional magnetic material based on a solid solution of Fe(II)/Co(II) complexes with a macrocyclic cyclam-based ligand

Popis výsledku anglicky

In order to prepare a multifunctional magnetic material combining spin crossover together with single-molecular magnetism, co-crystallization of Fe(ii) and Co(ii) complexes of the pyridine derivative of cyclam (Py-2-C = 1,8-bis(pyridin-2-ylmethyl)-1,4,8,11-tetraazacyclotetradecane) was performed. Complexes with the general formula [M-II(Py-2-C)](ClO4)(2)center dot H2O (M-II = Fe (1), Co (2) or Fe0.4Co0.6 (3)) were prepared and thoroughly characterized. Based on X-ray molecular structures, they formed octahedral complexes with cis-arrangement of the coordinated pyridine moieties. Magnetic data revealed that the Fe(ii) complex 1 shows complete SCO with the transition temperature T-1/2 = 141 K, which is preserved also in the mixed Fe/Co system 3 (T-1/2 = 128 K). Co(ii) complex 2 behaves as a field-induced single-molecule magnet as well as the mixed system 3 with a direct and phonon bottleneck relaxation process, respectively. This is the first example of such Fe/Co solid solution providing SCO in combination with field-induced SMM properties. Unfortunately, the light-induced excited spin-state trapping (LIESST) effect was not observed either for the Fe(ii) complex 1 or the mixed system 3 and thus, the effect of SCO on SMM properties at low temperature could not be investigated in detail. Nevertheless, the obtained results clearly document the success of the solid solution methodology for the preparation of multifunctional magnetic materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GA17-08992S" target="_blank" >GA17-08992S: Magneticky multifunkční molekulové materiály</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Dalton Transactions

ISSN

1477-9226

e-ISSN

—

Svazek periodika

50

Číslo periodika v rámci svazku

32

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

11147-11157

Kód UT WoS článku

000678900100001

EID výsledku v databázi Scopus

2-s2.0-85113784706