This article describes efforts toward the development of a new core for calamitic mesogens based upon the introduction of an extended heteroaromatic boron-containing ring. A series of tri-catenar mesogenic boronate ester derivatives of the 2-phenyl-1,3,2-benzodioxaborole has been synthesized and characterized. The flat central core appeared to be a suitable feature for these derivatives to support anisotropic alignment. Additionally, these derivatives should possess an inherent dipole in the core. However, thermal analysis (polarized optical microscopy and differential scanning calorimetry) did not reveal any mesophases.
This article describes efforts toward the development of a new core for calamitic mesogens based upon the introduction of an extended heteroaromatic boron-containing ring. A series of tri-catenar mesogenic boronate ester derivatives of the 2-phenyl-1,3,2-benzodioxaborole has been synthesized and characterized. The flat central core appeared to be a suitable feature for these derivatives to support anisotropic alignment. Additionally, these derivatives should possess an inherent dipole in the core. However, thermal analysis (polarized optical microscopy and differential scanning calorimetry) did not reveal any mesophases.
Soluble late transition metal catalysts for olefin oligomerizations III
申请人:Zhao Baiyi
公开号:US20060036049A1
公开(公告)日:2006-02-16
A series of soluble α-diimine late transition metal catalysts has been invented comprising a substituted or unsubstituted catecholate ligand. The catalysts demonstrate high activity and selectivity for linear α-olefins. As such, these catalysts conveniently oligomerize ethylene. Typical activators as known to those of ordinary skill in the art are used to activate these transition metal catalysts. These catalysts can be used in a supported or unsupported form.
SOLUBLE LATE TRANSITION METAL CATALYSTS FOR OLEFIN OLIGOMERIZATIONS III
申请人:ExxonMobil Chemical Patents Inc.
公开号:EP1620447A1
公开(公告)日:2006-02-01
[EN] SOLUBLE LATE TRANSITION METAL CATALYSTS FOR OLEFIN OLIGOMERIZATIONS III<br/>[FR] CATALYSEURS A BASE DE METAUX DE TRANSITION TARDIFS SOLUBLES POUR OLIGOMERISATIONS III D'OLEFINES
申请人:EXXONMOBIL CHEM PATENTS INC
公开号:WO2003102006A1
公开(公告)日:2003-12-11
A series of soluble a-diimine late transition metal catalysts has been invented comprising a substituted or unsubstituted catecholate ligand. The catalysts demonstrate high activity and selectivity for linear a-olefins. As such, these catalysts conveniently oligomerize ethylene. Typical activators as known to those of ordinary skill in the art are used to activate these transition metal catalysts. These catalysts can be used in a supported or unsupported form.
TOWARD BORONATE ESTER MESOGENIC STRUCTURES
作者:Maura Belloni、M. Manickam、Zehn-He Wang、Jon A. Preece
DOI:10.1080/15421400390223158
日期:2003.1.1
This article describes efforts toward the development of a new core for calamitic mesogens based upon the introduction of an extended heteroaromatic boron-containing ring. A series of tri-catenar mesogenic boronate ester derivatives of the 2-phenyl-1,3,2-benzodioxaborole has been synthesized and characterized. The flat central core appeared to be a suitable feature for these derivatives to support anisotropic alignment. Additionally, these derivatives should possess an inherent dipole in the core. However, thermal analysis (polarized optical microscopy and differential scanning calorimetry) did not reveal any mesophases.