Redox-induced spin-state switching and mixed valency in quinonoid-bridged dicobalt complexes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F14%3A00428492" target="_blank" >RIV/61388955:_____/14:00428492 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/chem.201302858" target="_blank" >http://dx.doi.org/10.1002/chem.201302858</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/chem.201302858" target="_blank" >10.1002/chem.201302858</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Redox-induced spin-state switching and mixed valency in quinonoid-bridged dicobalt complexes

Popis výsledku v původním jazyce

The complexes [{(tmpa)Co(II) }2 (mu-L(1) )(2-) ](2+) (1(2+) ) and [{(tmpa)Co(II) }2 (mu-L(2) )(2-) ](2+) (2(2+) ), with tmpa=tris(2-pyridylmethyl)amine, H2 L(1) =2,5-di-[2-(methoxy)-anilino]-1,4-benzoquinone, and H2 L(2) =2,5-di-[2-(trifluoromethyl)-anilino]-1,4-benzoquinone, were synthesized and characterized. Structural analysis of 2(2+) revealed a distorted octahedral coordination around the cobalt centers, and cobalt-ligand bond lengths that match with high-spin Co(II) centers. Superconducting quantum interference device (SQUID) magnetometric studies on 1(2+) and 2(2+) are consistent with the presence of two weakly exchange-coupled high-spin cobalt(II) ions, for which the nature of the coupling appears to depend on the substituents on the bridgingligand, being antiferromagnetic for 1(2+) and ferromagnetic for 2(2+) . Both complexes exhibit several one-electron redox steps, and these were investigated with cyclic voltammetry and UV/Vis/near-IR spectroelectrochemistry. For 1(2+) , i

Název v anglickém jazyce

Redox-induced spin-state switching and mixed valency in quinonoid-bridged dicobalt complexes

Popis výsledku anglicky

The complexes [{(tmpa)Co(II) }2 (mu-L(1) )(2-) ](2+) (1(2+) ) and [{(tmpa)Co(II) }2 (mu-L(2) )(2-) ](2+) (2(2+) ), with tmpa=tris(2-pyridylmethyl)amine, H2 L(1) =2,5-di-[2-(methoxy)-anilino]-1,4-benzoquinone, and H2 L(2) =2,5-di-[2-(trifluoromethyl)-anilino]-1,4-benzoquinone, were synthesized and characterized. Structural analysis of 2(2+) revealed a distorted octahedral coordination around the cobalt centers, and cobalt-ligand bond lengths that match with high-spin Co(II) centers. Superconducting quantum interference device (SQUID) magnetometric studies on 1(2+) and 2(2+) are consistent with the presence of two weakly exchange-coupled high-spin cobalt(II) ions, for which the nature of the coupling appears to depend on the substituents on the bridgingligand, being antiferromagnetic for 1(2+) and ferromagnetic for 2(2+) . Both complexes exhibit several one-electron redox steps, and these were investigated with cyclic voltammetry and UV/Vis/near-IR spectroelectrochemistry. For 1(2+) , i

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA203%2F09%2F0705" target="_blank" >GA203/09/0705: Přenos náboje v izolovaných a uspořádaných molekulách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Chemistry - A European Journal

ISSN

0947-6539

e-ISSN

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Svazek periodika

20

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

12

Strana od-do

3475-3486

Kód UT WoS článku

000332747400030

EID výsledku v databázi Scopus

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