量化分析化催化剂活性和结构特征在支的胺-基烯复合体中
Victor Mougel1, Celine B Santiago2, Pavel A Zhizhko1
1†Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 2, 8093 Zürich, Switzerland.
研究人员开发了精确定义的支持的转化催化剂. 在olefin转化中的催化剂活性是可预测的,使用连接体的电子和硬质性质,使得合理的催化剂设计.
科学领域:
- 有机金属化学 有机金属化学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 开发明确的异质催化剂对于工业应用至关重要.
- 支持的复合物为烯转化提供了可调节的特性.
- 了解结构-活动关系是优化催化剂性能的关键.
研究的目的:
- 为了合成和表征一系列以二氧化为支的转化催化剂.
- 为了评估cis-4-nonene的自我转移中的催化剂活性.
- 为预测催化剂性能建立定量结构-活性关系.
主要方法:
- 通过将预先形成的复合物移植到脱化上来合成支持的催化剂.
- 用转换频率 (TOF) 在cis-4-nonene自我转移中评估催化剂活性.
- 应用多变量线性回归分析,以将连接物特性与活性相关联.
主要成果:
- 准备了一系列精确定义的支持的催化剂,具有不同的imido (NAr) 和辅助 (X) 连接物.
- 催化剂活性 (TOF) 用体 (Sterimol B5) 和电子 (NBO电荷,IR强度,pKa) 参数进行了定量预测.
- 高活性是通过结合具有相反电子特征的 imido 和辅助配体来实现的.
结论:
- 对于支持的转化催化剂,建立了定量结构-活性关系.
- 催化剂性能可以根据简单的固态和电子联体参数来预测.
- 这项工作为高活性异质转化催化剂的合理设计提供了基础.
更多相关视频
10:39Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
19:58Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
相关概念视频
Aldehydes and Ketones to Alkenes: Wittig Reaction Mechanism
The reaction begins with the nucleophilic addition between a phosphorus ylide and the carbonyl compound. Due to its carbanionic character, phosphorus ylide acts as a strong nucleophile and attacks the electrophilic carbonyl group. This generates a charge-separated dipolar intermediate called betaine. The negatively charged oxygen atom and...
Olefin Metathesis Polymerization: Overview
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Aldehydes and Ketones to Alkenes: Wittig Reaction Overview
Heterogeneous Catalysis
Alkenes via Reductive Coupling of Aldehydes or Ketones: McMurry Reaction
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
