Liquid-crystalline perylene tetracarboxylic bisimide derivatives bearing heptamethylcyclotetrasiloxane moieties have been synthesized. Compound 2 bearing four heptamethylcyclotetrasiloxane moieties exhibits a rectangular columnar phase at room temperature. In the columnar phase, the cyclotetrasiloxane rings interdigitate into neighbouring columns and their interaction promotes the formation of the columnar mesomorphic structure. A time-of-flight measurement reveals that the electron mobility in the columnar phase of compound 2 is on the order of 10−2 cm2 V−1 s−1 at room temperature. Compound 2 is soluble in various organic solvents except for alcohol.
tetracarboxylic bisimide (PTCBI) derivativebearing four cyclotetrasiloxane rings that forms a columnar phase at room temperature despite the presence of the bulky cyclotetrasiloxane rings was prepared. The electron mobility in the columnar phase of this PTCBI derivative at room temperature is 0.12 cm2 V−1 s−1, which is comparable to those of molecular crystals. The PTCBI derivative is soluble in various organic
制备了带有四个环四硅氧烷环的per四羧酸双酰亚胺(PTCBI)衍生物,尽管存在庞大的环四硅氧烷环,该环四硅氧烷环在室温下仍形成柱状相。该PTCBI衍生物在室温下在柱状相中的电子迁移率为0.12 cm 2 V -1 s -1,可与分子晶体相媲美。PTCBI衍生物可溶于各种有机溶剂中,并且通过旋涂法成功地制备了液晶薄膜。旋涂的薄膜在暴露于三氟甲磺酸蒸气后不溶。在聚合过程中,LC相中的柱状结构得以保留。使用摩擦转移方法,制备了宏观取向的LC薄膜,并且在聚合后保留了光学各向异性。
PERYLENE TETRACARBOXYLIC ACID BISIMIDE DERIVATIVE, N-TYPE SEMICONDUCTOR, A METHOD FOR PRODUCING N-TYPE SEMICONDUCTOR, AND ELECTRONIC DEVICE
申请人:Funahashi Masahiro
公开号:US20140024171A1
公开(公告)日:2014-01-23
The present invention provides a perylene tetracarboxylic acid bisimide derivative which enables the formation of an n-type semiconductor having high carrier mobility and has superior solubility. The perylene tetracarboxylic acid bisimide derivative is a perylene tetracarboxylic acid bisimide derivative represented by the following chemical formula (I), a tautomer or stereoisomer of the perylene tetracarboxylic acid bisimide derivative, or a salt of the perylene tetracarboxylic acid bisimide derivative or the tautomer or stereoisomer,
In the chemical formula (I), R
1
to R
6
each represents a hydrogen atom, organooligosiloxane, or any substituent, at least one of R
1
to R
6
represents a monovalent substituent derived from organooligosiloxane, L
1
and L
2
each represents a single bond or a linking group, R
7
to R
10
each represents a lower alkyl group or a halogen, and o, p, q, and r each represents an integer from 0 to 2.
MULTI-HEADED CHAIN SHUTTLING AGENTS AND THEIR USE FOR THE PREPARATION OF BLOCK COPOLYMERS
申请人:Dow Global Technologies Llc
公开号:EP3243846A2
公开(公告)日:2017-11-15
This disclosure relates to olefin polymerization catalysts and compositions, their manufacture, and the production of polyolefins using specific catalyst compositions, including the use of chain-shuttling agents in the olefin polymerization process. Specifically, this disclosure provides for dual-headed and multi-headed chain shuttling agents (CSAs or MSAs) and for their use in preparing blocky copolymers. By controlling the ratio of dual-headed and multi-headed CSA sites to mono-headed CSA sites, a blocky copolymer can be provided having properties such as a narrow molecular weight distribution and/or improved melt properties.
CHAIN SHUTTLING AGENTS AND THEIR USE FOR THE PREPARATION OF BLOCK COPOLYMERS
申请人:Dow Global Technologies Llc
公开号:EP3489264A1
公开(公告)日:2019-05-29
The present disclosure relates to olefin polymerization catalysts and compositions, their manufacture and the production of polyolefins using specific catalyst compositions, including the use of chain-shuttling agents in the olefin polymerization process. Specifically, the present disclosure provides for dual-headed and multi-headed chain shuttling agents and their use in preparing block copolymers. By controlling the ratio of dual-headed and multi-headed chain shuttling agent sites to mono-headed chain shuttling agent sites, a block copolymer can be provided having properties such as narrow molecular weight distribution and/or improved melt properties.