Bimetallic bis(benzotriazole iminophenolate) cobalt, nickel and zinc complexes as versatile catalysts for coupling of carbon dioxide with epoxides and copolymerization of phthalic anhydride with cyclohexene oxide

2016 ◽  
Vol 6 (6) ◽  
pp. 1779-1791 ◽  
Author(s):  
Chun-Yue Yu ◽  
Hui-Ju Chuang ◽  
Bao-Tsan Ko
Keyword(s):  
Carbon Dioxide ◽  
Phthalic Anhydride ◽  
Nickel Catalysts ◽  
Zinc Complexes ◽  
Cyclohexene Oxide ◽  
Cobalt Nickel ◽  
Cobalt And Nickel

New bimetallic bis(benzotriazole iminophenolate) cobalt and nickel catalysts were developed for versatile catalysis of CO2/epoxide coupling and PA/CHO copolymerization.

scholarly journals Ring-Opening Copolymerization of Cyclohexene Oxide and Cyclic Anhydrides Catalyzed by Bimetallic Scorpionate Zinc Catalysts

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1651
Author(s):  
Felipe de la Cruz-Martínez ◽  
Marc Martínez de Sarasa Buchaca ◽  
Almudena del Campo-Balguerías ◽  
Juan Fernández-Baeza ◽  
Luis F. Sánchez-Barba ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Mechanism ◽  
Catalytic System ◽  
Phthalic Anhydride ◽  
Ring Opening ◽  
High Selectivity ◽  
Zinc Complexes ◽  
Cyclohexene Oxide ◽  
Reaction Conditions ◽  
Cyclic Anhydrides

The catalytic activity and high selectivity reported by bimetallic heteroscorpionate acetate zinc complexes in ring-opening copolymerization (ROCOP) reactions involving CO2 as substrate encouraged us to expand their use as catalysts for ROCOP of cyclohexene oxide (CHO) and cyclic anhydrides. Among the catalysts tested for the ROCOP of CHO and phthalic anhydride at different reaction conditions, the most active catalytic system was the combination of complex 3 with bis(triphenylphosphine)iminium as cocatalyst in toluene at 80 °C. Once the optimal catalytic system was determined, the scope in terms of other cyclic anhydrides was broadened. The catalytic system was capable of copolymerizing selectively and efficiently CHO with phthalic, maleic, succinic and naphthalic anhydrides to afford the corresponding polyester materials. The polyesters obtained were characterized by spectroscopic, spectrometric, and calorimetric techniques. Finally, the reaction mechanism of the catalytic system was proposed based on stoichiometric reactions.

Cobalt–Nickel Catalysts for Selective Hydrogenation of Carbon Dioxide into Ethanol

ACS Catalysis ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 11335-11340 ◽  
Author(s):  
Lingxiang Wang ◽  
Shenxian He ◽  
Liang Wang ◽  
Ye Lei ◽  
Xiangju Meng ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Selective Hydrogenation ◽  
Nickel Catalysts ◽  
Cobalt Nickel ◽  
Hydrogenation Of Carbon Dioxide

Cationic Co–Salphen Complexes Bisligated by DMAP as Catalysts for the Copolymerization of Cyclohexene Oxide with Phthalic Anhydride or Carbon Dioxide

2017 ◽  
Vol 50 (20) ◽  
pp. 7895-7900 ◽  
Author(s):  
Masahiro Hatazawa ◽  
Rei Takahashi ◽  
Jingyuan Deng ◽  
Hirohiko Houjou ◽  
Kyoko Nozaki
Keyword(s):  
Carbon Dioxide ◽  
Phthalic Anhydride ◽  
Cyclohexene Oxide

scholarly journals Polynuclear alkoxy–zinc complexes of bowl-shaped macrocycles and their use in the copolymerisation of cyclohexene oxide and CO2

2019 ◽  
Vol 48 (15) ◽  
pp. 4887-4893 ◽  
Author(s):  
James R. Pankhurst ◽  
Shyeni Paul ◽  
Yunqing Zhu ◽  
Charlotte K. Williams ◽  
Jason B. Love
Keyword(s):  
Carbon Dioxide ◽  
Ring Opening ◽  
Zinc Complexes ◽  
Cyclohexene Oxide

Tri- and tetranuclear macrocyclic zinc alkoxides act as catalysts for the ring-opening polymerisation of epoxides and carbon dioxide.

New Derivatives of Quinoxaline – Syntheses, Complex Formation and their Application as Controlling Ligands for Zinc Catalyzed Epoxide-CO2–Copolymerization

2002 ◽  
Vol 57 (8) ◽  
pp. 946-956 ◽  
Author(s):  
O. Hampel ◽  
C. Rode ◽  
D. Walther ◽  
R. Beckert ◽  
H. Görls
Keyword(s):  
Carbon Dioxide ◽  
Complex Formation ◽  
Zinc Complexes ◽  
Zinc Ions ◽  
Cyclohexene Oxide ◽  
Analogous Manner ◽  
Type 3 ◽  
High Degree ◽  
Derivatives Of

A series of amino-(type 3) as well as hydrazino-substituted quinoxalines (type 8) have been synthesized in order to study their ability to complex with iron(III) and zinc(II) ions. Cyclization of 2,3-dichloroquinoxaline (1) with a bis-amidine 9 leads to ring-fused quinoxalines of type 10. One of these compounds (10a) forms a unique macrocyclic hexameric complex 14 with zinc ions in the presence of 2,6-diisopropyl phenolate. In an analogous manner, the monomeric complexes 12 and 13 could be synthesized. All of these new zinc complexes catalyze the copolymerization of cyclohexene oxide and carbon dioxide with a high degree of selectivity in the resulting polymers.

scholarly journals Kinetic study of carbon dioxide catalytic methanation over cobalt–nickel catalysts

2019 ◽  
Vol 7 (1) ◽  
pp. 74-80 ◽  
Author(s):  
Alla G. Dyachenko ◽  
Olena V. Ischenko ◽  
Snizhana V. Gaidai ◽  
Tetiana M. Zakharova ◽  
Andrii V. Yatsymyrskyi ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Atom ◽  
High Stability ◽  
Spectroscopic Analysis ◽  
Kinetic Equations ◽  
Nickel Catalysts ◽  
Carbon Dioxide Molecule ◽  
Cobalt Nickel ◽  
Limiting Step ◽  
Good Agreement

Based on the data of the thermoprogrammed desorption and using mass-spectroscopic analysis of desorbed products and on the kinetic patterns of the methanation process for cobalt–nickel catalysts, we suggested a mechanism for the reaction which passes through forming intermediate formyl compounds: CHO*, HCOH*, and HCOOH*. Because of the high stability of the carbon dioxide molecule, the step of adding the first hydrogen atom is the limiting step. Such a mechanism is in good agreement with the proposed kinetic equations.

The adsorption of carbon monoxide on evaporated metal films

1965 ◽  
Vol 258 (1089) ◽  
pp. 375-386 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Dissociative Adsorption ◽  
Nickel Titanium ◽  
Adsorptive Capacity ◽  
Similar Data ◽  
Iron Cobalt ◽  
Cobalt Nickel ◽  
Metallic Radius ◽  
Cobalt And Nickel

Calorimetric measurements at room temperature have been made of the heats of adsorption of carbon dioxide on evaporated films of iron, cobalt, nickel, titanium, molybdenum, tungsten, tantalum and niobium. These new data, considered along with similar data obtained previously for oxygen and carbon monoxide, provide strong evidence for dissociative adsorption of carbon dioxide into CO and O, except possibly on iron, cobalt and nickel. The saturation coverages for the adsorption of carbon dioxide on all the metals are distinguished by their smallness. Despite this, the adsorptive capacity for hydrogen of surfaces saturated with carbon dioxide is very small, except for nickel and to a lesser degree for iron. These observations have also been accounted for in terms of dissociative adsorption of carbon dioxide and the concentrations of krypton atoms in the monolayer deduced previously. For nickel and cobalt (and to some extent iron), adsorption of carbon dioxide in an undissociated form is a distinct possibility, but a clear conclusion cannot be reached. The linear dependence of heat of adsorption on metallic radius is discussed.

Dinuclear iron(iii) complexes bearing phenylene-bridged bis(amino triphenolate) ligands as catalysts for the copolymerization of cyclohexene oxide with carbon dioxide or phthalic anhydride

2018 ◽  
Vol 9 (38) ◽  
pp. 4733-4743 ◽  
Author(s):  
Zhan Shi ◽  
Qingzhe Jiang ◽  
Zhaozheng Song ◽  
Zhihui Wang ◽  
Canglong Gao
Keyword(s):  
Carbon Dioxide ◽  
Phthalic Anhydride ◽  
Cyclohexene Oxide ◽  
Dinuclear Iron

Dinuclear iron(iii) complexes bearing rigid ortho-, meta-, and para-phenylene bridges as effective catalysts for CHO/CO2 and CHO/PA copolymerizations.

Ring-opening copolymerisation of cyclohexene oxide and carbon dioxide catalysed by scorpionate zinc complexes

2016 ◽  
Vol 7 (42) ◽  
pp. 6475-6484 ◽  
Author(s):  
Javier Martínez ◽  
José A. Castro-Osma ◽  
Agustín Lara-Sánchez ◽  
Antonio Otero ◽  
Juan Fernández-Baeza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ring Opening ◽  
Zinc Complexes ◽  
Cyclohexene Oxide

New bimetallic heteroscorpionate zinc complexes have been developed and used as efficient catalysts for the synthesis of poly(cyclohexene carbonate).

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