On/Off Photoswitching in a Cyanide-Bridged {Fe2Co2} Magnetic Molecular Square

A repeatable bidirectional paramagnetic ↔ diamagnetic photomagnetic effect has been observed in the cyanide-bridged Fe–Co square complex {[Fe{B(pz)4}(CN)3]2[Co(bik)2]2}(ClO4)2·3H2O [B(pz)4 = tetrapyrazolylborate, bik = bis(1-methylimidazol-2-yl)ketone]. Magnetic measurements and low-temperature sing...

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Published inJournal of the American Chemical Society Vol. 135; no. 5; pp. 1653 - 1656
Main Authors Mondal, Abhishake, Li, Yanling, Seuleiman, Mannan, Julve, Miguel, Toupet, Loïc, Buron-Le Cointe, Marylise, Lescouëzec, Rodrigue
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 06.02.2013
Subjects
Biochemistry, Molecular Biology
Life Sciences
PRUSSIAN BLUE ANALOGS
COBALT-IRON CYANIDE
ALKALI-METAL-ION
RELAXATION
TRANSITIONS
CO
PHOTOINDUCED MAGNETIZATION
SOLID-STATE
INDUCED ELECTRON-TRANSFER
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Summary:A repeatable bidirectional paramagnetic ↔ diamagnetic photomagnetic effect has been observed in the cyanide-bridged Fe–Co square complex {[Fe{B(pz)4}(CN)3]2[Co(bik)2]2}(ClO4)2·3H2O [B(pz)4 = tetrapyrazolylborate, bik = bis(1-methylimidazol-2-yl)ketone]. Magnetic measurements and low-temperature single-crystal X-ray diffraction experiments have shown that a complete electron transfer from the diamagnetic FeII −Co III state to the paramagnetic FeIII −Co II metastable state is induced by 808 nm laser light irradiation, whereas the diamagnetic state is recovered in an almost quantitative yield under irradiation at 532 nm.
Bibliography:ObjectType-Article-1
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ISSN:0002-7863
1520-5126
DOI:10.1021/ja3087467