(15-(2-bromoisobutyryl)pentadecyl)dimethylethoxysilane | 1196794-21-4

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: (15-(2-bromoisobutyryl)pentadecyl)dimethylethoxysilane
• 英文别名: 15-BIDS；15-[Ethoxy(dimethyl)silyl]pentadecyl 2-bromo-2-methylpropanoate；15-[ethoxy(dimethyl)silyl]pentadecyl 2-bromo-2-methylpropanoate
• CAS: 1196794-21-4
• 化学式: C₂₃H₄₇BrO₃Si
• 分子量: 479.614
• InChiKey: DXKFHNPRWXOUNV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.02
• 重原子数：
  28
• 可旋转键数：
  20
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.96
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  二甲基乙氧基硅烷 、 pentadec-14-enyl-2-bromo-2-methyl propanoate 在 铂(0)-1,3-二乙烯-1,1,3,3-四甲基二硅氧烷 作用下， 反应 8.0h， 以85%的产率得到(15-(2-bromoisobutyryl)pentadecyl)dimethylethoxysilane
  参考文献：
  名称：

  Impact of Initiator Spacer Length on Grafting Polystyrene from Silica Nanoparticles

  摘要：

  Using atom transfer radical polymerization (ATRP), we synthesized hybrid organic/inorganic nanoparticles consisting of a silica core and a polystyrene brush. The brushes were grafted from the nanoparticles with three different initiators, termed 3-BIDS, 11-BIDS, and 15-BIDS, consisting respectively of a 3-, 11-, or 15-carbon spacer separating an ethoxylated silane from a brominated initiator end group. The initiators were characterized using H-1 NMR and C-13 NMR. Surface modification studies with all three initiators were performed to optimize their attachment, producing particles with dense covalently attached initiator monolayers with up to 2.6 initiators/nm(2). Polymers were then grafted from the particles using ATRP, the polymerization kinetics were characterized using gas chromatography (GC), and the final products were characterized using thermogravimetric analysis (TGA) and gel permeation chromatography (GPC). Analysis of the kinetics show an approximately identical rate of styrene conversion from all three initiators while GPC results show that the molecular weight of the polymers grown from the 11-BIDS monolayer increases faster than that grown from 3-BIDS or 15-BIDS. We also found that the graft densities of polystyrene are on average 0.5 chains/nm(2) greater for particles modified with 3-BIDS or 15-BIDS at 0.7 chains/nm(2) than for 11-BIDS at 0.2 chains/nm(2). Our results indicate that the roughly 3-fold drop in graft density for the particles modified with the 11-BIDS is most likely due to a change in the conformation of the 11-BIDS monolayer.

  DOI：

  10.1021/ma1004259