Retention of configuration in Lewis acid mediated α-alkylation of carbonyl compounds using SN1 reactive alkyl halides
作者:M.T. Reetz、M. Sauerwald、P. Walz
DOI:10.1016/s0040-4039(01)90247-3
日期:——
Certain SN1 reactive alkylhalides undergo CC bond formation in Lewis acid induced α-alkylations of carbonyl compounds with formal retention of configuration
某些S N 1反应性烷基卤化物在路易斯酸诱导的羰基化合物的α-烷基化反应中经历CC键的形成,并保留了构型
Optical member and optical product having the same
申请人:——
公开号:US20030179460A1
公开(公告)日:2003-09-25
An optical member comprising a polymer which is amorphous and has a glass transition temperature of not lower than 110° C. and optical property parameters O′
R
(∞)) and O′
G
(∞) that satisfy the following inequality (1),
|
O′
G
(∞)|<−0.75×|
O′
R
(∞)|+0.017 (1),
is superior in its heat resistance and transparency and high in its stability of optical properties. Therefore, the optical member can be used as, for example, a constituent of optical systems in a liquid crystal display, thereby suppressing change in a display color tone depending on variation of using circumstances of the liquid crystal display.
一种光学部件,包含一种无定形聚合物,其玻璃化转变温度不低于 110 摄氏度,光学特性参数 O′
R
(∞)) 和 O′
G
(∞)满足以下不等式(1)、
&verbar;
O′
G
(∞)|<-0.75×&verbar;
O′
R
(∞)|+0.017 (1)、
O′ R (∞;|+0.017(1),耐热性、透明度和光学性能的稳定性都很好。因此,该光学部件可用作液晶显示器等光学系统的组成部件,从而抑制显示器色调随液晶显示器使用环境的变化而变化。