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Letter
Nature Materials 7, 48–51 (1 January 2008) | doi:10.1038/nmat2067
Thermochromism in an organic crystal based on the coexistence of |[sigma]|- and |[pi]|-dimers
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Abstract
Transition-metal complexes and organic radical molecules can be used to make electric conductors and ferromagnets, the optical properties of which can be controlled by changing temperature and are used as molecular switches and sensors. Whereas a number of organic radicals in solution show temperature-dependent optical properties, such behaviour in crystalline forms is more rare.
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