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CO2 - 触发层次孔UiO-66基皮克林乳液,用于双相系统中高效和可回收的苏子-米拉交叉合

Xiaoyan Pei¹, Wangyue Song¹

¹College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, P. R. China.

Langmuir : the ACS journal of surfaces and colloids

|October 9, 2023

概括

层次孔金属有机框架 (H-MOFs) 稳定了CO2切换皮克林乳液. 在H-UiO-66上接种Pd(OAc) 2可产生新型乳化剂,用于由CO2和N2.2触发的智能脱乳和再乳化.

科学领域:

材料科学材料科学材料科学
超分子化学超分子化学
纳米技术纳米技术

背景情况:

层级孔金属有机框架 (H-MOF) 是有前途的皮克林乳液稳定剂,因为它们具有独特的孔隙结构和高表面积.
通过H-MOF稳定的刺激反应性皮克林乳液尚未得到充分研究,这限制了它们的应用潜力.
开发新的基于H-MOF的乳化剂,用于可切换的皮克林乳液,对于先进的应用至关重要.

研究的目的:

为了合成和描述与离子液体功能化的新型Pd(OAc) 2-移植的H-UiO-66材料.
研究这些材料稳定可转换二氧化碳的皮克林乳液的能力.
阐明二氧化碳触发的切换行为背后的机制,并探索潜在的应用.

主要方法:

在层次孔MOF (H-UiO-66) 上将酸 (Pd(OAc) 2) 植入,使用1-基-3-甲基利米达2-烯化盐.
使用合成的Pd(OAc) 2-[C_MIM][2-CN-Pyr]@H-UiO-66作为n-hexane-water皮克林乳液的乳化剂.
使用光谱技术研究由CO2和N2交替触发的乳液切换机制.
展示了可转换二氧化碳的皮克林乳液在催化苏苏基-米拉交叉合反应中的应用.

主要成果:

成功合成了Pd(OAc) 2-[C_MIM][2-CN-Pyr]@H-UiO-66乳化剂,能够稳定低度 (0.5 wt %) 的皮克林乳液.
智能CO2切换的演示:在交替引入CO2和N2.2,皮克林乳液经历可逆脱乳和再乳化.
转换机制的解,涉及离子液体的二氧化碳诱导的酸反应,改变乳化剂的水性和可湿性.
作为苏子-米亚乌拉合的微反应器的成功应用,集成反应,产品分离和催化剂回收.

结论:

Pd(OAc) 2-[C_MIM][2-CN-Pyr]@H-UiO-66代表了一种基于H-MOF的乳化剂的新型类别,用于对刺激有反应的皮克林乳液.
二氧化碳切换能力为乳液控制提供了一种绿色和高效的方法.
这些可切换的皮克林乳液显示出作为用于催化和分离过程的集成微反应器的巨大潜力.

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