A Vanadium(V) Alkylidene Complex Exhibiting Remarkable Catalytic Activity for Ring-Opening Metathesis Polymerization (ROMP)

2005 ◽  
Vol 24 (10) ◽  
pp. 2248-2250 ◽  
Author(s):  
Junji Yamada ◽  
Michiya Fujiki ◽  
Kotohiro Nomura
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization

Mechanosynthesis of Noels-type NHC-Ruthenium Complexes and Applications in ROMP

2019 ◽  
Author(s):  
François Quintin ◽  
Julien Pinaud ◽  
Frédéric Lamaty ◽  
Xavier Bantreil
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ruthenium Complexes ◽  
High Catalytic Activity ◽  
Imidazolium Salts ◽  
Ring Opening Metathesis Polymerization ◽  
Ball Mills ◽  
Metathesis Polymerization ◽  
Rapid Access ◽  
The One

The use of ball-mills enabled the efficient mechanosynthesis of a variety of N-aryl,N-alkyl imidazolium salts and of corresponding NHC-silver(I) complexes. Transmetalation with ruthenium via mechanochemistry allowed the rapid access (1.5 min to 1 h) to complexes having a similar structure to Noels-type precatalysts. Evaluation of the complexes in the Ring-Opening Metathesis Polymerization of norbornene in different solvent, including non-toxic ones, showed a high catalytic activity for one of them, comparable to the one of Noels catalyst.<br>

Ring Opening Metathesis Polymerization of Norbornene by WCl6: Formation of WCl5 and WCl4 and Their Catalytic Activity

1996 ◽  
Vol 61 (9) ◽  
pp. 1353-1359 ◽  
Author(s):  
Hynek Balcar ◽  
Zdeněk Bastl
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Main Reaction ◽  
Reaction Products ◽  
Double Bonds ◽  
Ring Opening Metathesis Polymerization ◽  
Chlorine Atoms ◽  
Metathesis Polymerization ◽  
Xps Spectroscopy ◽  
Tungsten Species

Reaction between WCl6 and norbornene in benzene and cyclohexane, respectively, was investigated using UV/VIS, ESR and XPS spectroscopy in order to establish the main reaction products on the tungsten side and their relation to the initiation of ring opening metathesis polymerization (ROMP) of norbornene. The tungsten compounds: WCl5, insoluble WCl4 and soluble tungsten species having four chlorine atoms bound to tungsten, [WCl4Ln] were found to be the main products. The catalytic activity of the respective compounds in ROMP of norbornene was found to decrease in the order: WCl5 > WCl6 >> WCl4 ~ [WCl4Ln]. The polynorbornenes prepared with both WCl4 and [WCl4Ln] possess higher content of cis double bonds in comparison with polymers prepared with WCl6 and WCl5 catalysts.

Mechanosynthesis of Noels-type NHC-Ruthenium Complexes and Applications in ROMP

2019 ◽  
Author(s):  
François Quintin ◽  
Julien Pinaud ◽  
Frédéric Lamaty ◽  
Xavier Bantreil
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ruthenium Complexes ◽  
High Catalytic Activity ◽  
Imidazolium Salts ◽  
Ring Opening Metathesis Polymerization ◽  
Ball Mills ◽  
Metathesis Polymerization ◽  
Rapid Access ◽  
The One

The use of ball-mills enabled the efficient mechanosynthesis of a variety of N-aryl,N-alkyl imidazolium salts and of corresponding NHC-silver(I) complexes. Transmetalation with ruthenium via mechanochemistry allowed the rapid access (1.5 min to 1 h) to complexes having a similar structure to Noels-type precatalysts. Evaluation of the complexes in the Ring-Opening Metathesis Polymerization of norbornene in different solvent, including non-toxic ones, showed a high catalytic activity for one of them, comparable to the one of Noels catalyst.<br>

A poly(polyoxometalate)-b-poly(hexanoic acid) block copolymer: synthesis, self-assembled micelles and catalytic activity

2015 ◽  
Vol 6 (42) ◽  
pp. 7418-7426 ◽  
Author(s):  
Wen-Ke Miao ◽  
Ang Yi ◽  
Yu-Kun Yan ◽  
Li-Jun Ren ◽  
Da Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Block Copolymer ◽  
Ring Opening ◽  
Hexanoic Acid ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Polymer Hybrid ◽  
Self Assembled

A poly(polyoxometalate)-polymer hybrid block copolymer (H-BCP) was prepared via ring-opening metathesis polymerization (ROMP). The H-BCP self-assembles into hybrid micelles with a poly(polyoxometalate) shell and a polymer core in acetonitrile.

Synthesis and Purification of Tunable High Tg Electro-Optical Polymers by Ring Opening Metathesis Polymerization

2011 ◽  
Author(s):  
Robert H. Lambeth ◽  
Joseph M. Dougherty ◽  
Joshua A. Orlicki ◽  
Adam M. Rawlett ◽  
Robert C. Hoffman ◽  
...  
Keyword(s):  
Ring Opening ◽  
Optical Polymers ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization
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