过渡金属的配位几何结构在超分子配位配合物的自组装过程中起着至关重要的作用。在此,作为催化活性位点的七配位 3d 金属离子被用作模板,用于设计组织选定的子组分,从而导致新型共价金属环的自组装。单晶结构证明共价金属环的尺寸、构型和官能化可以分别通过选择刚性二酰肼、过渡金属离子和预官能化亚组分来调节。此外,用羧基修饰的金属环可作为前体通过分级组装制备气凝胶,该气凝胶仍然表现出对 CO2 环加成成环状碳酸酯的高催化活性。
过渡金属的配位几何结构在超分子配位配合物的自组装过程中起着至关重要的作用。在此,作为催化活性位点的七配位 3d 金属离子被用作模板,用于设计组织选定的子组分,从而导致新型共价金属环的自组装。单晶结构证明共价金属环的尺寸、构型和官能化可以分别通过选择刚性二酰肼、过渡金属离子和预官能化亚组分来调节。此外,用羧基修饰的金属环可作为前体通过分级组装制备气凝胶,该气凝胶仍然表现出对 CO2 环加成成环状碳酸酯的高催化活性。
fine‐tuning of the manganese centered redox potential, without significant change to the overall complex arrangement that is crucial for a correct comparison regarding their superoxide dismutase mimetic (SODm) capabilities. The crystal structure of the seven‐coordinate OMe‐substituted Mn‐pyane complex was obtained. The synthesized complexes will serve for future investigations related to an effect of complex
Bis(imino)pyridine vanadium (III) and cobalt (II) complexes catalyzed selective dimerization of propylene
作者:Zhi Luo、Jialei Gao、Mengshuai Li、Zhi Wen、Huayi Li
DOI:10.1016/j.mcat.2023.113782
日期:2024.1
a topic worthy of in-depth research. In this regard, a series of bis(imino)pyridine vanadium (III) and cobalt (II) complexes have been synthesized and employed to selectively produce valuable products, such as 4-methyl-1-pentene (4M1P) and 1-hexene (1-H), through propylene dimerization with methylaluminoxane (MAO) as a cocatalyst. The study found that when halogen substituents are introduced on the
Direct Access to 4-Carboxy-1,8-naphthyridines and Related Compounds through Pfitzinger-Type Chemistry
作者:Ruifa Zong、Hui Zhou、Randolph P. Thummel
DOI:10.1021/jo800456r
日期:2008.6.1
The 4-carboxy-1,8-naphthyrid-2-yl moiety is a useful ligand component in that it promotes lower energy electronic absorption in its metal complexes and also provides a useful tether for anchoring the ligand to a semiconductor surface. The synthon [2-(pivaloylamino)pyrid-3-yl]oxoacetic acid ethyl ester can be easily obtained in two steps from 2-aminopyridine. The Pfitzinger-type condensation of this molecule with a 2-acetylazaaromatic species in ethanolic KOH, after acidification, directly provides bi- and tridentate ligands containing the 4-carboxy-1,8-naphthyrid-2-yl moiety.
We present two cobalt pyridyldiimine complexes functionalized with pyrene for selective CO2 electroreduction in water upon immobilization on multi-walled carbon nanotubes.