Compounds of Group 14 Elements with an Element−Element (E = Si, Ge, Sn) Bond: Effect of the Nature of the Element Atomстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 19 сентября 2015 г.
Аннотация:Two series of germanium compounds, (pTol)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)3GeSiPh3
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.