CN113173938A - 一种磁性车轮六核铽簇合物催化剂及其制备方法和应用 - Google Patents
一种磁性车轮六核铽簇合物催化剂及其制备方法和应用 Download PDFInfo
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Abstract
本发明涉及一种磁性车轮六核铽簇合物催化剂及其制备方法和应用，属于稀土配合物催化剂技术领域。主要是解决现有MPV反应使用的催化剂存在结构复杂，不易制备，催化剂活性不够高，用量大，反应时间长的技术问题。本发明的技术方案是：磁性车轮六核铽簇合物催化剂的制备方法，其包括如下步骤：将0.05mmol的Tb(NO3)3·6H2O、10ml的乙腈、0.05mmol的三乙胺和0.1mmol的三乙醇胺依次装入带盖容器中，然后将其密封，并将密封后的容器放置在温度为70～80℃的烘箱中反应30～36小时，反应结束后，取出密封容器静置冷却至室温，析出无色块状晶体即为磁性车轮六核铽簇合物催化剂。
Description
技术领域
本发明涉及一种磁性车轮六核铽簇合物催化剂及其制备方法和应用，属于稀土配合物催化剂技术领域。
背景技术
稀土配合物作为一种新型的功能材料，以其独特的磁、光及电学等性质受到越来越多化学、物理、生物和材料科学家的重视。近十几年，稀土簇合物以其独特的结构且在分子基磁性材料方面展现出一定的特性，特别是其在吸附、分离、催化、化学传感、药物运输等方面有广泛的应用前景而备受关注。Meerwein-Ponndorf-Verley(MPV)反应是用于制备一级和二级醇的选择性的合成方法，也是有机合成、制药和食物香料工业等领域的一个重要转化过程。该反应报道的催化剂存在结构复杂，不易制备，催化剂活性不够高，用量大，反应时间长等不足。因此，开发新的和有效的催化反应系统仍然是科学研究的重点。
发明内容
本发明的目的是解决现有MPV反应使用的催化剂存在结构复杂，不易制备，催化剂活性不够高，用量大，反应时间长的技术问题，提供一种磁性车轮六核铽簇合物催化剂及其制备方法和应用。
为解决上述技术问题，本发明采用的技术方案是：
一种磁性车轮六核铽簇合物催化剂，其结构式为：
式中：每一个铽原子与配体中的三个氧原子、一个氮原子、相邻两个配体中的氧原子和硝基中的两个氧原子形成八配位结构，这样的六个八配位结构单元依次利用氧原子桥联形成一个车轮状六核的金属铽簇合物分子结构。
一种磁性车轮六核铽簇合物催化剂的制备方法，其包括如下步骤：
将0.05mmol的Tb(NO3)3·6H2O、10ml的乙腈、0.05mmol的三乙胺和0.1mmol的三乙醇胺依次装入带盖容器中，然后将其密封，并将密封后的容器放置在温度为70～80℃的烘箱中反应30～36小时，反应结束后，取出密封容器静置冷却至室温，析出无色块状晶体即为磁性车轮六核铽簇合物催化剂；产率73-82％。
进一步地，所述容器为玻璃瓶或玻璃烧杯。
所述磁性车轮六核铽簇合物催化剂作为还原催化剂在醛、酮化合物制备相应的一级、二级醇类化合物中应用。
与现有技术相比本发明的优点和效果：本发明合成的配合物采用“一锅法”制得，制备过程简单，原料易得，反应条件温和，高产率地合成磁性车轮六核铽簇合物，其作为催化剂对醛、酮类化合物的MPV反应有较高选择性，能高效地合成相应的醇类化合物，该催化反应时间短、效率高，有很好的工业应用前景。
附图说明
图1是本发明磁性车轮六核铽簇合物的单晶X射线结构图。
具体实施方式
下面结合实施例对本发明做进一步的详细描述。
实施例1
本实施例中的一种磁性车轮六核铽簇合物催化剂，其结构式为：
式中：每一个铽原子与配体中的三个氧原子、一个氮原子、相邻两个配体中的氧原子和硝基中的两个氧原子形成八配位结构，这样的六个八配位结构单元依次利用氧原子桥联形成一个车轮状六核的金属铽簇合物分子结构。
上述磁性车轮六核铽簇合物催化剂的制备方法，其包括如下步骤：
将0.05mmol的Tb(NO3)3·6H2O、10ml的乙腈、0.05mmol的三乙胺和0.1mmol的三乙醇胺依次装入容量为20ml的带盖玻璃瓶中，然后将其密封，并将密封后的玻璃瓶放置在温度为80℃的烘箱中反应36小时，反应结束后，取出密封容器静置冷却至室温，析出无色块状晶体即为磁性车轮六核铽簇合物催化剂；产率78％。反应式：
晶体参数：化学式：C36H78N6O36Tb6，三斜晶系(triclinic)，空间群P-1，晶胞参数
α＝93.149(2)°，β＝108.499(2)°，γ＝103.061(3)°，V＝1802.7(2)，Z＝1。
单晶结构图见图1。部分键长
Tb(1)-N(1)2.639(4)，Tb(1)-O(1)2.447(4)，Tb(1)-O(2)2.287(4)，Tb(1)-O(3)2.319(3)，Tb(1)-O(5)2.263(4)，Tb(1)-O(7)2.305(3)，Tb(1)-O(10)2.535(4)，Tb(1)-O(11)2.508(4)；键角(°)：O(1)-Tb(1)-O(2)91.88(14)，O(1)-Tb(1)-O(3)123.87(13)，O(1)-Tb(1)-O(7)83.96(13)，O(2)-Tb(1)-O(3)98.47(13)，N(1)-Tb(1)-O(1)64.59(12)，N(1)-Tb(1)-O(2)68.78(14)，N(1)-Tb(1)-O(3)68.50(13)，N(1)-Tb(1)-O(5)134.84(12)，N(1)-Tb(1)-O(7)125.93(13)，N(1)-Tb(1)-O(10)88.92(14)，N(1)-Tb(1)-O(11)129.17(13)。
上述实施例中的温度还可在为70～80℃之间选取，反应时间在30～36小时之间选取。
实施例2
(1)磁性车轮六核铽簇合物催化剂的制备同实施例1。
(2)催化苯乙酮还原为1-苯乙醇(MPV)：将磁性车轮六核铽簇合物催化剂(0.46g，0.2mmol)与3.0mL异丙醇依次加入到25毫升装有回流冷凝管的圆底烧瓶中，然后再向烧瓶中的反应液加入苯乙酮(0.48g，4.0mmol)，待反应混合液继续回流反应2小时后，冷却，取少量反应产物用GC-MS联用仪监测，产率89％。
以上所述，仅是本发明的较佳实施例，并非对本发明作任何限制，凡是根据本发明技术实质对以上实施例所作的任何简单修改、变更以及等效变化，均仍属于本发明技术方案的保护范围内。
Claims (4)
1.一种磁性车轮六核铽簇合物催化剂，其特征在于，结构式为：
式中：每一个铽原子与配体中的三个氧原子、一个氮原子、相邻两个配体中的氧原子和硝基中的两个氧原子形成八配位结构，这样的六个八配位结构单元依次利用氧原子桥联形成一个车轮状六核的金属铽簇合物分子结构。
2.如权利要求1所述的一种磁性车轮六核铽簇合物催化剂的制备方法，其特征在于：包括如下步骤：
将0.05mmol的Tb(NO3)3·6H2O、10ml的乙腈、0.05mmol的三乙胺和0.1mmol的三乙醇胺依次装入带盖容器中，然后将其密封，并将密封后的容器放置在温度为70～80℃的烘箱中反应30～36小时，反应结束后，取出密封容器静置冷却至室温，析出无色块状晶体即为磁性车轮六核铽簇合物催化剂。
3.如权利要求2所述的一种磁性车轮六核铽簇合物催化剂的制备方法，其特征在于：所述容器为玻璃瓶或玻璃烧杯。
4.如权利要求1所述的一种磁性车轮六核铽簇合物催化剂的应用，其特征在于：所述磁性车轮六核铽簇合物催化剂作为还原催化剂在醛、酮化合物制备相应的一级、二级醇类化合物中应用。
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| DAVID A. EVANS，等: "A Chiral Samarium-Based Catalyst for the Asymmetric Meenvein-Ponndorf-Verley Reduction", 《J. AM. CHEM. SOC.》 * |
| STUART K. LANGLEY，等: "Oblate versus Prolate Electron Density of Lanthanide Ions: A Design Criterion for Engineering Toroidal Moments? A Case Study on {LnIII6} (Ln=Tb, Dy, Ho and Er) Wheels", 《CHEM. EUR. J.》 * |
| 服部英，等: "《固体酸催化》", 31 May 2016, 复旦大学出版社 * |
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