Water- and Temperature-Triggered Reversible Structural Transformation of Tetranuclear Cobalt(II) Cores Sandwiched by Polyoxometalates

Although stimuli‐responsive structural transformations of inorganic materials have attracted considerable attention because of their potential use as functional switchable materials, multinuclear metal cores frequently suffer from unexpected dissociation of metal cations and/or irreversible transfor...

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Bibliographic Details
Published in:Chemistry : a European journal 2016-03, Vol.22 (12), p.3962-3966
Main Authors: Kuriyama, Yosuke, Kikukawa, Yuji, Suzuki, Kosuke, Yamaguchi, Kazuya, Mizuno, Noritaka
Format: Article
Language:English
Subjects:
Cations
Chemistry
Cobalt
Cores
Cuba
Cubane
Dehydration
Dynamical systems
Dynamics
Functional anatomy
Hydration
Inorganic materials
Magnetic properties
Metals
Optical properties
polyoxometalates
Polyoxometallates
Stimuli
structural transformation
Temperature
Temperature effects
Thermochromism
Transformations
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Description
Summary:Although stimuli‐responsive structural transformations of inorganic materials have attracted considerable attention because of their potential use as functional switchable materials, multinuclear metal cores frequently suffer from unexpected dissociation of metal cations and/or irreversible transformations into infinite structures. In this study, we describe the successful demonstration of the water‐ and temperature‐triggered reversible structural transformation between cubane‐ and planar‐type tetranuclear CoII cores sandwiched by polyoxometalates. The arrangements and coordination geometries of the CoII cations were interconverted by simple hydration and dehydration, resulting in the manipulation of the magnetic and optical properties of these compounds. Moreover, this system showed unique thermochromism through temperature‐dependent reversible structural interconversion. Ch‐ch‐ch‐ch‐changes: Water‐ and temperature‐triggered reversible structural transformation between cubane‐ and planar‐type tetranuclear CoII cores was successfully demonstrated (see figure) within polyoxometalates, allowing dynamic manipulation of the magnetic and optical properties.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201600139