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.
Monofunctional (Dimethylamino)silane as Silylating Agent
作者:Katalin Szabó、Ngoc Le Ha、Philippe Schneider、Peter Zeltner、Ervin sz. Kováts
DOI:10.1002/hlca.19840670813
日期:1984.12.19
The reaction of triorganyl(dimethylamino)silanes with surface-hydrated silicon dioxide has been studied. These silylatingagents are easy to prepare from the corresponding chloro or bromosilanes with dimethylamine. The resulting products are thermally stable and relatively volatile. Reaction with surface-hydrated silicon-dioxide preparations at 150–250°C for 170 h yields a dense grafted layer. However
A novel silicon-containing copolymer with an alternating structure, poly[(5-decyldimethylsilyl-1,3-phenylenevinylene)-alt-(2,5-didodecyloxy-1,4-phenylenevinylene)], is synthesized through the Wittig reaction. The polymer is a promising green-blue emissive material for light-emitting device application due to its good solubility, high thermal stability, and intense photoluminescence.
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。
FULLERENE DERIVATIVES
申请人:Nakamura Eiichi
公开号:US20090247777A1
公开(公告)日:2009-10-01
The present invention provides a fullerene derivative represented by the following formula (1):
wherein in formula (1), R
1
is a substituted or unsubstituted organic group or a hydrogen atom, and wherein in formulae (2) and (3): W is a single bond, C
1
-C
11
, alkylene, C
2
-C
12
alkenylene, or C
2
-C
12
alkynylene, wherein any —CH
2
— in the alkylene, alkenylene or alkynylene can be substituted with —O—, —S—, —COO—, or —OCO—; Z is an element belonging to group IVB; and R
21
to R
23
are each independently a substituted or unsubstituted C
1
-C
20
alkyl group, a substituted or unsubstituted C
2
-C
15
alkenyl group, or a substituted or unsubstituted C
2
-C
15
alkynyl group.