Trialkylsilylethynyl-substituted triphenylenes and hexabenzocoronenes: highly soluble liquid crystalline materials and their hole transport abilities
摘要:
Four triphenylene (TP) and four hexa-peri-hexabenzocoronene (HBC) derivatives with trialkylsilylethynyl groups were prepared and characterized by differential scanning calorimetry, polarizing optical microscopy, and X-ray diffraction measurements. All compounds were highly soluble in less-polar organic solvents and exhibited a columnar phase, Col(h) or Col(r) for the TPs, and Col(h) for the HBCs. The hole transport ability in the HBCs' columnar phase, 0.4-1.5x10(-3) cm(2) V-1 s(-1) at 40-180 degrees C, and its temperature dependence were determined by the time-of-flight method using a solution technique. (C) 2015 Elsevier Ltd. All rights reserved.
Trialkylsilylethynyl-substituted triphenylenes and hexabenzocoronenes: highly soluble liquid crystalline materials and their hole transport abilities
摘要:
Four triphenylene (TP) and four hexa-peri-hexabenzocoronene (HBC) derivatives with trialkylsilylethynyl groups were prepared and characterized by differential scanning calorimetry, polarizing optical microscopy, and X-ray diffraction measurements. All compounds were highly soluble in less-polar organic solvents and exhibited a columnar phase, Col(h) or Col(r) for the TPs, and Col(h) for the HBCs. The hole transport ability in the HBCs' columnar phase, 0.4-1.5x10(-3) cm(2) V-1 s(-1) at 40-180 degrees C, and its temperature dependence were determined by the time-of-flight method using a solution technique. (C) 2015 Elsevier Ltd. All rights reserved.
A General and Selective Synthesis of Methylmonochlorosilanes from Di-, Tri-, and Tetrachlorosilanes
作者:Yuki Naganawa、Kei Sakamoto、Yumiko Nakajima
DOI:10.1021/acs.orglett.0c04175
日期:2021.1.15
Direct catalytic transformation of chlorosilanes into organosilicon compounds remains challenging due to difficulty in cleaving the strong Si–Cl bond(s). We herein report the palladium-catalyzed cross-coupling reaction of chlorosilanes with organoaluminum reagents. A combination of [Pd(C3H5)Cl]2 and DavePhos ligand catalyzed the selective methylation of various dichlorosilanes 1, trichlorosilanes 5
由于难以裂解牢固的Si-Cl键,氯硅烷直接催化转化为有机硅化合物仍然具有挑战性。我们在本文中报道了氯硅烷与有机铝试剂的钯催化交叉偶联反应。[Pd(C 3 H 5)Cl] 2和DavePhos配体的组合催化了各种二氯硅烷1,三氯硅烷5和四氯硅烷6的选择性甲基化,得到了相应的一氯硅烷。
Preparation of Tetraalkylsilanes from Trichloromethylsilane and Trioctylaluminum
作者:Edward T. Sabourin、Anatoli Onopchenko
DOI:10.1246/bcsj.62.3691
日期:1989.11
The synthesis of methyltrioctylsilane has been achieved in a single-step from commercially available trichloromethylsilane and trioctylaluminum. Co-products resulting from alkyl group redistribution are minimized by addition of sodium or lithium halides. Use of potassium or rubidium halides drastically changes the course of the reaction to produce methyldioctylsilane as the major product.
Synthesis of triorganylchlorosilanes by catalytic reaction of triorganylsilanes with chlorobenzene
作者:Yu. I. Khudobin、N. A. Andreeva、N. P. Kharitonov、M. G. Voronkov
DOI:10.1007/bf00923508
日期:1974.4
Andrianov,K.A. et al., Journal of general chemistry of the USSR, 1976, vol. 46, p. 2166 - 2168
作者:Andrianov,K.A. et al.
DOI:——
日期:——
Mass spectra of some high molecular weight tetra(alkyl)silanes
作者:Anatoli Onopchenko、Edward T. Sabourin、David A. Danner
DOI:10.1002/oms.1210200805
日期:1985.8
AbstractThe mass spectra of tetra(alkyl)silanes having one short and three long alkyl groups were recorded (C20C32). These silanes did not give molecular ions, and the dominant course of fragmentation involved the loss of alkyl groups, followed by elimination of alkenes. The loss of alkyl groups, followed by elimination of alkenes. The loss of alkyl groups followed the sequence iso‐Pr>Et, Pr,… C14H29» Me. With alkyl groups longer than hexyl, a rearrangement was observed in which n‐alkanes were eliminated from the base ion. When the alkyl group was hexyl, the alkane eliminated was methane; when the alkyl group was heptyl, ethane was expelled; with octyl, it was propane; and with decyl, n‐pentane was expelled. Deuterium labeling showed that at least two modes of rearrangement were occurring.