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
A novel skeletalrearrangement of tetrasilanes in the palladium catalysed reaction with aryl isocyanides gives 3,3-disilyl-2,4-disila-1-azacyclobutane derivatives, the structure of one example of which has been determined by X-ray crystallography.
作者:Rebekka S. Klausen、Jonathan R. Widawsky、Michael L. Steigerwald、Latha Venkataraman、Colin Nuckolls
DOI:10.1021/ja211677q
日期:2012.3.14
Bulk silicon, the bedrock of information technology, consists of the deceptively simple electronic structure of just Si-Si σ bonds. Diamond has the same lattice structure as silicon, yet the two materials have dramatically different electronic properties. Here we report the specific synthesis and electrical characterization of a class of molecules, oligosilanes, that contain strongly interacting Si-Si
Dearylation of α,ω-diphenylpermethylated oligosilanes with triflic acid
作者:Karen E. Ruehl、Krzysztof Matyjaszewski
DOI:10.1016/0022-328x(91)83020-5
日期:1991.6
The relative rates of displacement of phenyl groups for a series of α,ω-diphenylpermethylated oligosilanes with the formula Ph(SiMe2)nPh (n = 2−5) were studied. Triflic acid was utilized in the displacementreactions which occur as a two-step process with protonation at the ipso-carbon atom as the rate limiting step. The results showed the displacement of the firs phenyl group is more facile than the