Octahedral Yb() complexes embedded in [Co(CN)]-bridged coordination chains: combining sensitized near-infrared fluorescence with slow magnetic relaxation

Ytterbium (3+) ions combined with 3-pyridone and hexacyanido-cobaltate( iii ) anions in a concentrated aqueous solution produce cyanido-bridged {[Yb III (3-pyridone) 2 (H 2 O) 2 ][Co III (CN) 6 ]} ( 1 ) chains. The resulting Yb III complexes of an elongated octahedral geometry reveal two coexisting...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2017-10, Vol.46 (4), p.13668-13672
Main Authors: Chorazy, Szymon, Rams, Micha, Wang, Junhao, Sieklucka, Barbara, Ohkoshi, Shin-ichi
Format: Article
Language:English
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Summary:Ytterbium (3+) ions combined with 3-pyridone and hexacyanido-cobaltate( iii ) anions in a concentrated aqueous solution produce cyanido-bridged {[Yb III (3-pyridone) 2 (H 2 O) 2 ][Co III (CN) 6 ]} ( 1 ) chains. The resulting Yb III complexes of an elongated octahedral geometry reveal two coexisting functionalities: a field-induced slow magnetic relaxation with an energy barrier of Δ E / k B = 45(1) K at H dc = 1 kOe, and an Yb III -centered near-infrared fluorescence in the 950-1100 nm range sensitized by 3-pyridone and [Co III (CN) 6 ] 3− . The rare octahedral Yb III complexes formed in the bimetallic Yb-Co chains reveal significant magnetic anisotropy and photoluminescence activity in the near-infrared range.
ISSN:1477-9226
1477-9234
DOI:10.1039/c7dt02239e