Nine heterometallic iodobismuthates with the general formula Cat{[BiMI}] (M = Cu(I), Ag(I), Cat = organic cation) were synthesized. According to X-ray diffraction data, their crystal structures consisted of {BiI} units interconnected with Cu(I) or Ag(I) atoms through I-bridging ligands, forming one-dimensional polymers. The compounds are thermally stable up to 200 °C. Optical band gaps (E), estimated at room temperature via diffuse reflectance measurements, range from 1.81 to 2.03 eV. Thermally induced changes in optical behavior (thermochromism) for compounds - were recorded, and general correlations were established. The thermal dependence of E appears to be close to linear for all studied compounds.
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| http://dx.doi.org/10.3390/ijms24087234 | DOI Listing |
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