Synthese und Reaktionsverhalten von Stannyloligosilanen, I. Kettenförmige Stannyloligosilane mit SiMe2-Einheiten/Synthesis and Reactivity of Stannyloligosilanes, I. Stannyloligosilane Chains Containing SiMe2 Moieties
An Electroreductive Approach to Radical Silylation via the Activation of Strong Si–Cl Bond
作者:Lingxiang Lu、Juno C. Siu、Yihuan Lai、Song Lin
DOI:10.1021/jacs.0c10899
日期:2020.12.23
In this context, reactions mediated by silyl radicals have become increasingly attractive but methods for accessing these intermediates remain limited. We present a new strategy for silyl radical generation via electroreduction of readily available chlorosilanes. At highly biased potentials, electrochemistry grants access to silyl radicals through energetically uphill reductive cleavage of strong
fluorescence of the zincporphyrin moiety in each dyad was quenched by the electrontransfer to the fullerene moiety. The transient absorption measurements revealed that the final state of the excited-state process was a radical ion pair with a radical cation on the zincporphyrin moiety and a radical anion on the fullerene moiety as a result of the charge separation. The charge separation and charge recombination
Liquid Crystalline Behavior of Linear Permethyloligosilanes
作者:Tetsuo Yatabe、Akira Kaito、Yoshikazu Tanabe
DOI:10.1246/cl.1997.799
日期:1997.8
Permethyloligosilanes, Me(SiMe2)nMe where n = 9, 10, 11, and 12, show the enantiotropic smectic B phase. In the liquid crystalline state, the silicon chains of these oligosilanes adopt all-trans conformation.
Polysilanes are known to exhibit the interesting property of σ-bond electrondelocalization. By employing optical spectroscopy (UV-vis), it is possible to judge the degree of delocalization and also differentiate parts of the molecules which are conjugated or not. The current study compares oligosilanes of similar chain length but different substitution pattern. The size of the substituents determines