默卡普托基改性半孔二氧化:用于合反应的可重复使用,异质催化剂的制备,一个显著的支持
Cathleen M Crudden1, Mutyala Sateesh, Roxanne Lewis
1Queen's University Department of Chemistry, 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6. cruddenc@chem.queensu.ca
Journal of the American Chemical Society
|July 14, 2005
概括
功能化的SBA-15有效地捕获 (Pd) 用于木-米亚乌拉和米佐罗基-赫克反应的催化. 醇连接物最大限度地减少了Pd出,确保了高的催化剂稳定性和可回收性.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术 纳米技术
背景情况:
- 在有机合成中,开发有效的 (Pd) 恢复和催化剂固定方法至关重要.
- 基于的材料由于其稳定性和可调性特性,为催化剂支持提供了多功能平台.
研究的目的:
- 为了合成和表征带有的SBA-15功能化与mercaptopropyl trimethoxysilane.
- 评估功能化材料在苏子-米亚乌拉和米佐罗基-赫克合反应中的催化活性.
- 评估反应条件下的流和催化剂稳定性.
主要方法:
- 用mercaptopropyl trimethoxysilane对SBA-15的功能化. 这是一个非常好的方法.
- 在功能化基支上固定.
- 在苏子-米亚乌拉和米佐罗基-赫克合反应中进行催化试验.
- 使用感应合等离子体质谱法 (ICP-MS) 进行泄漏研究.
- 异质性测试包括热过和三相实验.
主要成果:
- 用mercaptopropyl功能化的SBA-15有效地从各种溶液中吸收了.
- 由此产生的载材料在木-米亚乌拉和米佐罗基-赫克反应中表现出高的催化活性.
- 浸出研究显示,在使用醇功能化支时,损失最小 (低至3ppb).
- 与氨基化二氧化进行比较,突出显示了二醇连接体的优越的二氧化保留能力.
结论:
- 具有mercaptopropyl功能化的SBA-15是一种有效的材料,用于的回收和固定.
- 醇连接体在防止流出中发挥着至关重要的作用,确保了催化剂的稳定性.
- 催化反应主要通过表面结合的类物种进行,这证实了异质催化.
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