- Compounds of Group 14 Elements with an Element-Element (E = Si, Ge, Sn) Bond: Effect of the Nature of the Element Atom
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Two series of germanium compounds, (p-Tol)3Ge-MMe3 (M = Si (1), Ge (2), Sn (3)) and (Me3Si)3Ge-MPh3 (M = Ge (4), Sn (5)), were prepared using lithium or potassium intermediates. The changing of the reaction conditions results in trigermane Ph3Ge-Ge(SiMe3)2-GePh3 (6). The molecular structures of 1, 2, and 6 were investigated by X-ray analysis. By UV/visible spectroscopy it is established that introduction of a tin atom results in a significant bathochromic absorption shift. Furthermore, according to cyclic voltammetry, oxidation potentials decrease in the order 1 > 2 > 3. The electronic structures of 1-4 and related (Me3Si)3Ge-SiPh3 were investigated by DFT calculations. Fluorescence properties of 1-3 were studied in the solid state and in solution; for compound 3 phosphorescence (lifetime is 4.58 ms) is observed in the solid state. (Graph Presented).
- Zaitsev, Kirill V.,Lermontova, Elmira Kh.,Churakov, Andrei V.,Tafeenko, Viktor A.,Tarasevich, Boris N.,Poleshchuk, Oleg Kh.,Kharcheva, Anastasia V.,Magdesieva, Tatiana V.,Nikitin, Oleg M.,Zaitseva, Galina S.,Karlov, Sergey S.
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- Molecular Oligogermanes and Related Compounds: Structure, Optical and Semiconductor Properties
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The optical (UV/Vis absorbance, fluorescence in the solid state and in solution) and semiconducting properties of a number of di- and trigermanes as well as related silicon- and tin-containing germanes, 1–6 ((p-Tol)3GeGeMe3 (1), Ph3SnGe(SiMe3)3 (2), (C6F5)3GeGePh3 (3), (p-Tol)3GeSiMe2SiMe3 (4), (p-Tol)3GeGeMe2Ge(p-Tol)3 (5), (p-Tol)3GeSiMe2SiMe2Ge(p-Tol)3 (6)) were investigated. Molecular structures of 5 and 6 were studied by X-ray diffraction analysis. All compounds displayed luminescence properties. In addition, a band gap (of about 3.3 eV) was measured for compounds 1–6 showing that those molecules display semiconductor properties.
- Zaitsev, Kirill V.,Tafeenko, Viktor A.,Oprunenko, Yuri F.,Kharcheva, Anastasia V.,Zhanabil, Zhaisan,Suleimen, Yerlan,Lam, Kevin,Zaitsev, Vladimir B.,Zaitseva, Anna V.,Zaitseva, Galina S.,Karlov, Sergey S.
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p. 1240 - 1249
(2017/06/13)
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