24小时热门版块排行榜    

查看: 317  |  回复: 1
本帖产生 1 个 翻译EPI ,点击这里进行查看

wangxh1984

银虫 (小有名气)


[交流] 翻译

Recent reports have described
the placement of substituents onto R-diimine ligands and
their effect on the σ-donating ability to Pd(II) and thus the Lewis
acidity of the metal.26,27 In response, we carried out an investigation
of the polymerization behavior of a series of Pd(II) R-diimine
catalysts bearing substituents in the para-aryl position on the
ligand aromatic rings.28 We discovered that this substitution was
able to perturb the metal electronics in a regular manner, as
evidenced by the remarkably linear correlation observed in the
stretching frequencies of the corresponding carbonyl complexes.
Furthermore, several trends were observed in the physical properties
of the resulting polymers. The introduction of substituents
of increasing electron-donating ability led to catalysts that
afforded polymers of higher molecular weight, slightly reduced
branching density, and a corresponding shift toward less dendritic
polymer topologies. In the case of copolymerizations with
methyl acrylate, a clear and pronounced trend of increasing
acrylate incorporation ratio and overall tolerance to polar functionality
was also observed over the range of substitution explored.

» 猜你喜欢

» 抢金币啦!回帖就可以得到:

查看全部散金贴

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

crazybioinfo

金虫 (正式写手)


★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
wangxh1984(金币+2, 翻译EPI+1): 2011-03-16 15:49:17
ringzhu(金币+38): ~~ 2011-03-22 12:37:02
仅供参考
最近的报道描述了R-二亚胺配体上取代基的位置及其影响对二羟基聚醚(II)σ-贡献的能力,进而影响金属的刘易斯酸度。
作为回应,我们对一系列的在配体方环的芳基对位存在取代基的二羟基聚醚(II)R-二亚胺催化剂的聚合作用作了调查。
我们发现这种取代基能够有规律的扰动金属电子,因为在相应羰基复合体的伸展频率中观察到明显的线性相关性。另外,在所得聚合物的物理性质中也观察到几种趋势。能够增强电子贡献能力的取代基的引入,导致催化剂提供具有更高分子量的聚合物,显著减少分枝密度,以及相应的转变为较低树状聚合物的拓扑性质。在与丙烯酸甲酯的共聚合作用中,清晰显著的增强趋势在丙烯酸盐合并率以及在研究的替换范围内对极性功能的整体容度中都有所呈现。
2楼2011-03-14 19:14:43
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 wangxh1984 的主题更新
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 北科281学硕材料求调剂 +6 tcxiaoxx 2026-03-20 6/300 2026-03-22 20:23 by edmund7
[考研] 311求调剂 +6 冬十三 2026-03-18 6/300 2026-03-22 20:18 by edmund7
[考研] 一志愿上海交大生物与医药专硕324分,求调剂 +3 jiajunX 2026-03-22 3/150 2026-03-22 19:32 by brblmd
[考研] 306求调剂 +5 来好运来来来 2026-03-22 5/250 2026-03-22 16:17 by BruceLiu320
[考研] 一志愿中南化学(0703)总分337求调剂 +9 niko- 2026-03-19 10/500 2026-03-22 16:08 by ColorlessPI
[考研] 303求调剂 +5 安忆灵 2026-03-22 6/300 2026-03-22 12:46 by 素颜倾城1988
[考研] 初试 317 +7 半拉月丙 2026-03-20 7/350 2026-03-21 22:26 by peike
[考研] 333求调剂 +5 87639 2026-03-21 7/350 2026-03-21 19:31 by ColorlessPI
[考研] 0805 316求调剂 +3 大雪深藏 2026-03-18 3/150 2026-03-21 18:55 by 学员8dgXkO
[考研] 求调剂 +3 13341 2026-03-20 3/150 2026-03-21 18:28 by 学员8dgXkO
[考研] 【考研调剂】化学专业 281分,一志愿四川大学,诚心求调剂 +11 吃吃吃才有意义 2026-03-19 11/550 2026-03-21 18:23 by 学员8dgXkO
[考研] 297求调剂 +11 戏精丹丹丹 2026-03-17 12/600 2026-03-21 17:47 by ColorlessPI
[考研] 346求调剂[0856] +4 WayneLim327 2026-03-16 7/350 2026-03-21 04:02 by JourneyLucky
[考研] 一志愿中国石油大学(华东) 本科齐鲁工业大学 +3 石能伟 2026-03-17 3/150 2026-03-21 02:22 by JourneyLucky
[考研] 324分 085600材料化工求调剂 +4 llllkkkhh 2026-03-18 4/200 2026-03-21 01:24 by JourneyLucky
[考研] 一志愿华南师大 070300(化学)304分求调剂 +3 0703武芊慧雪304 2026-03-18 3/150 2026-03-21 00:48 by JourneyLucky
[考研] 296求调剂 +6 www_q 2026-03-18 10/500 2026-03-20 23:56 by JourneyLucky
[考研] 一志愿南京理工大学085701资源与环境302分求调剂 +4 葵梓卫队 2026-03-18 6/300 2026-03-20 23:02 by JourneyLucky
[考研] 【同济软件】软件(085405)考研求调剂 +3 2026eternal 2026-03-18 3/150 2026-03-18 19:09 by 搏击518
[考研] 材料,纺织,生物(0856、0710),化学招生啦 +3 Eember. 2026-03-17 9/450 2026-03-18 10:28 by Eember.
信息提示
请填处理意见