NHC-based coordination polymers as solid molecular catalysts for reductive amination of biomass levulinic acid

2017 ◽  
Vol 19 (3) ◽  
pp. 789-794 ◽  
Author(s):  
Zheming Sun ◽  
Jiangbo Chen ◽  
Tao Tu
Keyword(s):  
Coordination Polymer ◽  
High Activity ◽  
Coordination Polymers ◽  
Levulinic Acid ◽  
Reductive Amination ◽  
Solvent Free ◽  
Molecular Catalyst ◽  
Molecular Catalysts

Novel NHC-Ru coordination polymer acts as a high activity solid molecular catalyst in the solvent-free reductive aminations of levulinic acid. Besides the catalyst could be reused for 37 runs, up to 6.7 × 104 TON could be achieved.

scholarly journals Pyrene Carboxylate Ligand Based Coordination Polymers for Microwave-Assisted Solvent-Free Cyanosilylation of Aldehydes

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1101
Author(s):  
Anirban Karmakar ◽  
Anup Paul ◽  
Elia Pantanetti Sabatini ◽  
M. Fátima C. Guedes da Silva ◽  
Armando J. L. Pombeiro
Keyword(s):  
Coordination Polymer ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Metal Ion ◽  
Solvent Free ◽  
Lewis Acidity ◽  
Carboxylate Ligand ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Assisted

The new coordination polymers (CPs) [Zn(μ-1κO1:1κO2-L)(H2O)2]n·n(H2O) (1) and [Cd(μ4-1κO1O2:2κN:3,4κO3-L)(H2O)]n·n(H2O) (2) are reported, being prepared by the solvothermal reactions of 5-{(pyren-4-ylmethyl)amino}isophthalic acid (H2L) with Zn(NO3)2.6H2O or Cd(NO3)2.4H2O, respectively. They were synthesized in a basic ethanolic medium or a DMF:H2O mixture, respectively. These compounds were characterized by single-crystal X-ray diffraction, FTIR spectroscopy, thermogravimetric and elemental analysis. The single-crystal X-ray diffraction analysis revealed that compound 1 is a one dimensional linear coordination polymer, whereas 2 presents a two dimensional network. In both compounds, the coordinating ligand (L2−) is twisted due to the rotation of the pyrene ring around the CH2-NH bond. In compound 1, the Zn(II) metal ion has a tetrahedral geometry, whereas, in 2, the dinuclear [Cd2(COO)2] moiety acts as a secondary building unit and the Cd(II) ion possesses a distorted octahedral geometry. Recently, several CPs have been explored for the cyanosilylation reaction under conventional conditions, but microwave-assisted cyanosilylation of aldehydes catalyzed by CPs has not yet been well studied. Thus, we have tested the solvent-free microwave-assisted cyanosilylation reactions of different aldehydes, with trimethylsilyl cyanide, using our synthesized compounds, which behave as highly active heterogeneous catalysts. The coordination polymer 1 is more effective than 2, conceivably due to the higher Lewis acidity of the Zn(II) than the Cd(II) center and to a higher accessibility of the metal centers in the former framework. We have also checked the heterogeneity and recyclability of these coordination polymers, showing that they remain active at least after four recyclings.

scholarly journals Selectively Reductive Amination of Levulinic Acid with Aryl amines to N-substituted Aryl Pyrroles

2021 ◽  
Author(s):  
Cailing Wu ◽  
Mengjie Lou ◽  
Mingming Sun ◽  
Huiyong Wang ◽  
Zhiyong Li ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
Reductive Amination ◽  
Aryl Amines

Coordination-induced emission enhancement in copper(I) iodide coordination polymers supported by 2-(alkylsulfanyl)pyrimidines

2021 ◽  
Author(s):  
Katerina A. Vinogradova ◽  
Nikita Shekhovtsov ◽  
Alexey Sergeevich Berezin ◽  
Taisiya Sukhikh ◽  
Maxim I. Rogovoy ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Coordination Polymers ◽  
Molar Ratios ◽  
Emission Enhancement

First examples of copper(I) complexes with 2-(alkylsulfanyl)pyrimidine ligands have been synthesized. Reactions of copper(I) iodide with 2-(methylsulfanyl)pyrimidine (L1) in various metal-to-ligand molar ratios in MeCN afford a ladder-type coordination polymer...

Porous cross-linked polymer copper and iridium catalyzed the synthesis of quinoxalines and functionalized ketones under solvent-free conditions

2021 ◽  
Author(s):  
Jiahao Li ◽  
Minyi Yu ◽  
Zheng-Chao Duan ◽  
Haiyan Zhu ◽  
Wei Yao ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Solvent Free ◽  
Highly Active ◽  
Solvent Free Conditions ◽  
Catalytic Applications

The development of highly active and efficient ligands is recognized to be crucial for catalytic applications of coordination polymers under specific conditions, such as solvent-free or in water. A new...

Ferromagnetic ordering of –[Sm(iii)-radical]n– coordination polymers

2016 ◽  
Vol 52 (31) ◽  
pp. 5414-5417 ◽  
Author(s):  
Elisabeth M. Fatila ◽  
Adam C. Maahs ◽  
Michelle B. Mills ◽  
Mathieu Rouzières ◽  
Dmitriy V. Soldatov ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Coordination Polymers ◽  
Ferromagnetic Ordering

A structurally characterized lanthanide-radical coordination polymer exhibits ferromagnetic ordering. Superexchange and McConnel I mechanisms are implicated.

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