A Stable Zn-Based Metal–Organic Framework as an Efficient Catalyst for Carbon Dioxide Cycloaddition and Alcoholysis at Mild Conditions
作者:Zhiqiang Luo、Jun Wang、Yanqing He、Qiong Ao、Qiang Deng、Zheling Zeng、Hongming Wang、Shuguang Deng
DOI:10.1007/s10562-019-03053-6
日期:2020.5
heterogeneous catalysts for cycloaddition of CO2 and epoxides to produce cyclic carbonates is promising but challenging. In this work, a novel three-dimensional metal organic framework (MOF) with cylinder pore systems and unsaturated Zn sites has been demonstrated as potent candidate in CO2 fixation at mild and solvent-free conditions. The Zn(atz)(bdc) 0.5 , where atz = aminotriazole and H 2 bdc = terephthalic
摘要 开发用于 CO 2 和环氧化物环加成以生产环状碳酸酯的高效多相催化剂是有前景的,但具有挑战性。在这项工作中,具有圆柱孔系统和不饱和锌位点的新型三维金属有机骨架 (MOF) 已被证明是在温和和无溶剂条件下固定 CO 2 的有效候选者。Zn(atz)(bdc) 0.5 ,其中atz = 氨基三唑和H 2 bdc = 对苯二甲酸,表现出微孔性质,可以调节活性中心和底物的催化相互作用。结构稳定性已被系统地研究并证明足以用于实际应用。此外,已经深入研究了孔隙率、CO 2 结合亲和力、活化中心以及与助催化剂的协同作用的协同效应。而且,在温和条件(60 °C 和 1 MPa)下实现了高环氧丙烷转化率 (97%) 和选择性 (> 99%),并具有出色的循环稳定性。由于定义明确的孔系统,已经清楚地观察到明显的底物选择性。已经提出并通过 DFT 计算验证了一种可能的催化机制。此外,所制备的Zn-MOF还
Metallized mesoporous silicate and method of oxidation with the same
申请人:Hagiya Koji
公开号:US20050090688A1
公开(公告)日:2005-04-28
A metallized mesoporous silicate which is obtained by (i) reacting (a) either a metal peroxide obtained by the reaction of an aqueous hydrogen peroxide solution with at least one metal or metal compound selected from the group consisting of the following 1) to 4) 1) tungsten 2) molybdenum 3) vanadium 4) compounds comprising 4
a
) any of tungsten, molybdenum, and vanadium and 4
b
) at least one element selected from Groups
13
to
16
(excluding oxygen) or a solution of the metal peroxide with (b) a silicon compound in the presence of an alkylamine or a quaternary ammonium salt and separating the resultant silicate; and a process for producing the metallized mesoporous silicate. Also provided is a method of organic synthesis with the silicate.
PROCESS FOR PRODUCING ALIPHATIC ALDEHYDIC ACID AND/OR ALIPHATIC DICARBOXYLIC ACID AND CATALYST FOR THE PRODUCTION
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:EP1142858A1
公开(公告)日:2001-10-10
A process for producing an aliphatic aldehydic acid (e.g., adipaldehydic acid) and/or aliphatic dicarboxylic acid (e.g., adipic acid) which comprises oxidizing a cyclic ketone (e.g., cyclohexanone) with molecular oxygen in the presence of an immobilized catalyst which comprises a composite comprising a support and supported thereon at least one metallic element belonging to Groups 4 to 11 of the Periodic Table and has an acid amount of 0.06 mmol or larger per gram of the support.
METALLIZED MESOPOROUS SILICATE AND METHOD OF OXIDATION WITH THE SAME
申请人:Sumitomo Chemical Company, Limited
公开号:EP1473275A1
公开(公告)日:2004-11-03
A metallized mesoporous silicate which is obtained by (i) reacting (a) either a metal peroxide obtained by the reaction of an aqueous hydrogen peroxide solution with at least one metal or metal compound selected from the group consisting of the following 1) to 4) 1) tungsten 2) molybdenum 3) vanadium 4) compounds comprising 4a) any of tungsten, molybdenum, and vanadium and 4b) at least one element selected from Groups 13 to 16 (excluding oxygen) or a solution of the metal peroxide with (b) a silicon compound in the presence of an alkylamine or a quaternary ammonium salt and separating the resultant silicate; and a process for producing the metallized mesoporous silicate. Also provided is a method of organic synthesis with the silicate.