799-35-9Relevant academic research and scientific papers
Silane bridging luminescent material, preparation method and application thereof, and color developing agent
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Paragraph 0078; 0082-0084, (2020/07/13)
The invention relates to the technical field of detection, and discloses a silane bridging luminescent material, a preparation method and an application thereof, and a color developing agent, the silane bridging luminescent material has a structure repres
An Electroreductive Approach to Radical Silylation via the Activation of Strong Si-Cl Bond
Lu, Lingxiang,Siu, Juno C.,Lai, Yihuan,Lin, Song
supporting information, p. 21272 - 21278 (2020/12/21)
The construction of C(sp3)-Si bonds is important in synthetic, medicinal, and materials chemistry. 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 Si-Cl bonds. This strategy proved to be general in various alkene silylation reactions including disilylation, hydrosilylation, and allylic silylation under simple and transition-metal-free conditions.
Conductive molecular silicon
Klausen, Rebekka S.,Widawsky, Jonathan R.,Steigerwald, Michael L.,Venkataraman, Latha,Nuckolls, Colin
supporting information; experimental part, p. 4541 - 4544 (2012/04/23)
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 σ bonds, the essential components of the bulk semiconductor. We used the scanning tunneling microscope-based break-junction technique to compare the single-molecule conductance of these oligosilanes to those of alkanes. We found that the molecular conductance decreases exponentially with increasing chain length with a decay constant β = 0.27 ± 0.01 A-1, comparable to that of a conjugated chain of C = C π bonds. This result demonstrates the profound implications of σ conjugation for the conductivity of silicon.
Conformation effect of oligosilane linker on photoinduced electron transfer of tetrasilane-linked zinc porphyrin-[60]fullerene dyads
Shibano, Yuki,Sasaki, Mikio,Tsuji, Hayato,Araki, Yasuyuki,Ito, Osamu,Tamao, Kohei
, p. 356 - 367 (2008/02/06)
A series of zinc porphyrin-[60]fullerene dyads linked by conformation-constrained tetrasilanes and permethylated tetrasilane have been synthesized for the evaluation of the conformation effect of the tetrasilane linkers on the photoinduced electron transf
Decomposition of bis( silyldiazomethyl) polysilanes: formation of polysilabicyclo(l.m.n)alkane derivatives
Ando, Wataru,Sugiyama, Mitsuru,Suzuki, Tomohisa,Kato, Chikako,Arakawa, Yusuke,Kabe, Yoshio
, p. 99 - 112 (2007/10/02)
The photolysis of bis(trimethylsilyldiazomethyl)disilane (4a) in tert-butyl alcohol provided the tert-butyl alcohol adducts S, 6, 7, 8 and 9.The structures of these products revealed the stepwise formation of asymmetric silenes as intermediates.Gas-phase
Zur Synthese des 1,2-Diphenyldecamethylcyclohexasilans
Uhlig, Wolfram
, p. C6 - C8 (2007/10/02)
The title compound has been prepared by cyclization of 1,6-dibromo-3,4-diphenyldecamethylhexasilane with lithium. The cleavage of the silicon-phenyl bonds of the cyclohexasilane by CF3SO3H gives the 1,2-bis-triflate derivate.
Dearylation of α,ω-diphenylpermethylated oligosilanes with triflic acid
Ruehl, Karen E.,Matyjaszewski, Krzysztof
, p. 1 - 12 (2007/10/02)
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 displacement reactions 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 first phenyl group is more facile than the second group.The largest difference in reactivities is found for the disilane.Competitive displacement reactions between various oligomers were analyzed to establish the influence of the chain length of oligosilanes on the relative reactivities of the terminal phenyl groups.Both the first and second phenyl group displacement reactions are faster for the longer chain oligomers than the shorter analogs.The 13C NMR spectra of the oligosilanes indicate the highest electron density on the ipso-carbon atoms in the disilane, in contrast to its lowest reactivity.This is interpreted by the increased stabilization of the positive charge in the transition state with an increase in the chain length.Thus, the reactivities of oligosilanes are governed by the structures of the transition states rather than the ground states.
