(2-bromo-2-methyl)propionyloxyhexyltriethoxysilane | 528560-29-4

• 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: (2-bromo-2-methyl)propionyloxyhexyltriethoxysilane
• 英文别名: 6-(Triethoxysilyl)hexyl 2-bromo-2-methylpropanoate；6-triethoxysilylhexyl 2-bromo-2-methylpropanoate
• CAS: 528560-29-4
• 化学式: C₁₆H₃₃BrO₅Si
• 分子量: 413.425
• InChiKey: SGHSHVYXVXXJNJ-UHFFFAOYSA-N

物化性质

• 沸点：
  388.4±22.0 °C(Predicted)
• 密度：
  1.135±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.31
• 重原子数：
  23
• 可旋转键数：
  15
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.94
• 拓扑面积：
  54
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  2-bromoisobutyric acid pent-4-enyl ester 、 三乙氧基硅烷 在 铂(0)-1,3-二乙烯-1,1,3,3-四甲基二硅氧烷 作用下， 以 甲苯 为溶剂， 生成 (2-bromo-2-methyl)propionyloxyhexyltriethoxysilane
  参考文献：
  名称：

  纳米级混合二氧化硅/聚合物Janus颗粒，具有双响应性半透明光晕

  摘要：

  我们报告了混合的Janus纳米粒子具有二氧化硅核和尺寸小于100 nm的单侧连接的聚合物电晕的多功能大规模合成策略。研究了这些纳米粒子与聚（2-（二甲基氨基）甲基丙烯酸乙酯）（PDMAEMA）半绒毛膜的刺激响应行为。该合成基于Pickering乳液聚合技术的改进版本，并以“接枝方式”与表面引发的原子转移自由基聚合（ATRP）相结合。第一步，通过Pickering乳液聚合制备聚醋酸乙烯酯（PVAc）乳胶颗粒。胶体稳定性由粘附在生长的聚合物颗粒表面的30 nm二氧化硅纳米颗粒提供。这导致聚合物胶乳被一层紧密固定的纳米颗粒铠装，该纳米颗粒的一侧浸入聚合物颗粒中并因此受到保护。通过ATRP引发剂（即（2-溴-2-甲基）丙酰基-氧己基三乙氧基硅烷）的化学吸附作用改性了颗粒的裸露面，并从界面上去除了颗粒后，PDMAEMA链从该化合物的改性面上生长了出来。二氧化硅颗粒，产生定义明确的Janus纳米颗粒，

  DOI：

  10.1016/j.polymer.2015.10.022

文献信息

• Synthesis and Frictional Properties of Poly(2,3-dihydroxypropyl methacrylate) Brush Prepared by Surface-initiated Atom Transfer Radical Polymerization
  作者：Motoyasu Kobayashi、Atsushi Takahara

  DOI：10.1246/cl.2005.1582

  日期：2005.12

  Surface-initiated atom transfer radical polymerization (ATRP) of (2,2-dimethyl-1,3-dioxolan-4-yl)methyl methacrylate (1) was carried out from an immobilized initiator on a silicon wafer to result in a high-density polymer brush, which was converted to the hydrophilic polymer brush consisting of 2,3-dihyroxypropyl methacrylate (2) units, successively. The poly(2) brush showed low dynamic friction coefficient in water.

  表面引发的原子转移自由基聚合（ATRP）对（2,2-二甲基-1,3-二氧杂环烷-4-基）甲基丙烯酸酯（1）在硅晶片上固定的引发剂进行，得到高密度聚合物刷，随后被转化为由2,3-二羟基丙基甲基丙烯酸酯（2）单元组成的亲水性聚合物刷。聚（2）刷在水中表现出低动态摩擦系数。
• Precise Synthesis of Poly(methyl methacrylate) Brush with Well-Controlled Stereoregularity Using a Surface-Initiated Living Anionic Polymerization Method
  作者：Masanao Sato、Tomoki Kato、Tomoyuki Ohishi、Ryohei Ishige、Noboru Ohta、Kevin L. White、Tomoyasu Hirai、Atsushi Takahara

  DOI：10.1021/acs.macromol.5b02773

  日期：2016.3.22

  formation of cavities within the brush structure. Concentrated poly(methyl methacrylate) (PMMA) brushes with well-controlled stereoregularity and polydispersity index (PDI) were prepared on flat and spherical substrates using a surface-initiated living anionic polymerization method in the presence of triethylaluminum (AlEt3). The syndiotactic PMMA brush forms with helical chains and is able to encapsulate

  密集接枝的聚合物刷（主要由垂直于基材取向的末端束缚链组成）由于其高度组织的结构而显示出许多独特的功能特性。在保持高接枝密度的同时控制主链的立体规则性提供了通过在刷结构内形成空腔来增加功能位点密度的更多机会。在三乙基铝（AlEt 3）存在下，使用表面引发的活性阴离子聚合方法，在平面和球形基材上制备了具有良好控制的立构规整度和多分散指数（PDI）的浓缩聚甲基丙烯酸甲酯（PMMA）刷子。间规PMMA刷具有螺旋链形式，并且能够包封C形成的腔内有60个分子。
• Synthesis of Monodisperse Silica Particles Coated with Well-Defined, High-Density Polymer Brushes by Surface-Initiated Atom Transfer Radical Polymerization
  作者：Kohji Ohno、Takashi Morinaga、Kyoungmoo Koh、Yoshinobu Tsujii、Takeshi Fukuda

  DOI：10.1021/ma048011q

  日期：2005.3.1

  Monodisperse silica particles (SiPs) of diameter between 100 and 1500 nm were surface-modified in a mixture of ethanol/water/ammonia with a newly designed triethoxysilane having an atom transfer radical polymerization (ATRP) initiating site, (2-bromo-2-methyl)propionyloxyhexyltriethoxysilane. The surface-initiated ATRP of methyl methacrylate (MMA) mediated by a copper complex was carried out with the initiator-fixed SiPs in the presence of a "sacrificial" (free) initiator. The polymerization proceeded in a living manner in all examined cases, producing SiPs coated with well-defined PMMA of a target molecular weight up to 480K with a graft density as high as 0.65 chains/nm(2). These hybrid particles had an exceptionally good dispersibility in organic solvents. Transmission electron microscopic and atomic force microscopic observations of their monolayers prepared at the air-water interface revealed that they formed an ordered 2-dimensional lattice extending throughout the monolayer.