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在微孔聚合物中捕获的纳米粒子:为异质碳交叉合反应量身定制的催化剂

Shin Ogasawara¹, Shinji Kato

¹Kawamura Institute of Chemical Research, 631 Sakado, Sakura, Chiba 285-0078, Japan.

Journal of the American Chemical Society

|March 16, 2010

概括

这项研究介绍了一种新的方法,可以在微孔聚合物中使用聚合诱导的相分离来制造纳米粒子. 由此产生的催化剂有效地促进了木-米亚拉反应,具有高产量和可回收性.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
纳米技术纳米技术
催化剂是一种催化剂.

背景情况:

开发高效和可回收的催化剂对于可持续的化学合成至关重要.
微孔聚合物为催化剂固定和增强反应性提供独特的特性.
纳米粒子 (PdNPs) 是各种有机转换的高效催化剂.

研究的目的:

开发一种用于制造嵌入微孔聚合物网络中的纳米粒子 (PdNP) 的一策略.
为了研究在木-米亚乌拉反应中合成的PdNP-聚合物复合物的催化性能.
评估新型催化剂系统的稳定性,可回收性和效率.

主要方法:

使用聚合诱导相分离 (PIPS) 在微孔聚合物内制造PdNP.
聚合物的多孔性 (BET分析) 和PdNP的大小和结晶性 (TEM) 的表征.
在水中的4'-bromoacetophenone和phenylboronic acid的Suzuki-Miyaura合中对催化活性的评估.

主要成果:

合成了一种具有高表面积 (511 m2/g) 和孔积 (1.01 mL/g) 的新型微孔聚合物.
均小的PdNPs (大约2个小时) 2.0nm) 在合成过程中成功地被封装在聚合物矩阵中.
在苏子-米亚乌拉反应中,PdNP聚合物催化剂表现出高效率 (>90%的产量在2小时内) 和出色的可回收性 (8次运行),泄露最小 (<0.27%).
实现了8.5×104的高营业额 ().

结论:

聚合诱导的相分离是创建含有PdNP的微孔聚合物的有效策略.
开发的催化剂在水中进行异质的苏子基-米亚乌拉反应时表现出卓越的活性,稳定性和可回收性.
树突体连接体在模拟PdNP和增强催化性能方面发挥着重要作用.

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