Aluminium alkyl complexes supported by [OSSO] type bisphenolato ligands: synthesis, characterization and living polymerization of rac-lactide

2005 ◽  
pp. 721 ◽  
Author(s):  
Haiyan Ma ◽  
Gianluca Melillo ◽  
Leone Oliva ◽  
Thomas P. Spaniol ◽  
Ulli Englert ◽  
...  
Keyword(s):  
Living Polymerization ◽  
Alkyl Complexes

Highly 3,4-selective living polymerization of 2-phenyl-1,3-butadiene with amidino N-heterocyclic carbene ligated rare-earth metal bis(alkyl) complexes

RSC Advances ◽  
2015 ◽  
Vol 5 (113) ◽  
pp. 93507-93512 ◽  
Author(s):  
Changguang Yao ◽  
Hongyan Xie ◽  
Dongmei Cui
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Living Polymerization ◽  
Alkyl Complexes

2-Phenyl-1,3-butadiene was polymerized using an amidino N-heterocyclic carbene lutetium bis(alkyl) precursor in high 3,4-selectivity (96.9%) and a living mode to afford a new plastic polydiene with a high Tg of 56.1 °C.

Controlled and Efficient Polymerization of Methyl Methacrylate Catalyzed by Pyridinylidenaminophosphines Based Lewis Pairs

2021 ◽  
Author(s):  
Fang Ge ◽  
Sun Li ◽  
Zhe Wang ◽  
Wenzhong Zhang ◽  
Xiaowu Wang
Keyword(s):  
Molecular Weight ◽  
Methyl Methacrylate ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Living Polymerization ◽  
Narrow Molecular Weight Distribution ◽  
Synthetic Approaches ◽  
Lewis Pairs

Developing different synthetic approaches to realize controlled or living polymerization are aspirational to achieve polymers with defined molecular weight, narrow molecular weight distribution and unambiguous structures by polymer chemists. Herein,...

Living Polymerization Caught in the Act: Direct Observation of an Arrested Intermediate in Metathesis Polymerization

2019 ◽  
Vol 141 (25) ◽  
pp. 10039-10047 ◽  
Author(s):  
Jung-Ah Song ◽  
Bohyun Park ◽  
Soohyung Kim ◽  
Cheol Kang ◽  
Dongwhan Lee ◽  
...  
Keyword(s):  
Direct Observation ◽  
Living Polymerization ◽  
Metathesis Polymerization

Synthesis of PMMA-b-PS Block Copolymer by Emulsion ATRP and its Self-Assembly Property

2013 ◽  
Vol 705 ◽  
pp. 115-119
Author(s):  
Bao Yong Tian ◽  
Er Jun Tang ◽  
Miao Yuan ◽  
Rui Xia Hao ◽  
Cun Man Li ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Block Copolymer ◽  
Self Assembly ◽  
Potential Application ◽  
Morphological Characteristic ◽  
Living Polymerization ◽  
The Self ◽  
Emulsion System ◽  
Copolymer Concentration ◽  
Ft Ir

The well-defined block copolymer PMMA-b-PS was prepared by two-step ATRP in emulsion system. GPC results indicate that Mn increased linearly with conversion and polydispersity remained relatively narrow. It presents the characteristics of living polymerization in emulsion system. FT-IR demonstrated that block copolymer PMMA-b-PS could be successfully synthesized by ATRP with macroinitiator PMMA-Cl in emulsion system. The morphological characteristic of the self-assembly depends on the block copolymer concentration and transforms between spheres and rodlike micelles. The property indicates a perfect potential application in drug delivery materials.

scholarly journals Living Polymerization of Propylene with ansa-Dimethylsilylene(fluorenyl)(cumylamido) Titanium Complexes

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 131 ◽  
Author(s):  
Huajin Wang ◽  
Xinwei Wang ◽  
Yanjie Sun ◽  
Hailong Cheng ◽  
Takeshi Shiono ◽  
...  
Keyword(s):  
Living Polymerization ◽  
Titanium Complexes

Iminoacyl Alkyl Complexes of Zirconium Supported by a Ferrocene-Linked Diphosphinoamide Ligand Scaffold

2016 ◽  
Vol 69 (5) ◽  
pp. 555 ◽  
Author(s):  
Nathan R. Halcovitch ◽  
Michael D. Fryzuk
Keyword(s):  
General Formula ◽  
Mechanistic Studies ◽  
Hydrogen Shift ◽  
Alkyl Complexes ◽  
Rate Determining Step ◽  
Zirconium Complexes ◽  
Alkyl Derivatives ◽  
Benzyl Substituent

Zirconium dialkyl complexes of the general formula fc(NPiPr2)2ZrR2 (where fc = 1,1′-ferrocenyl, R = CH3, CH2Ph, CH2tBu, tBu) have been synthesized and characterized via the addition of alkyl lithium or potassium benzyl derivatives to the dichloride complex fc(NPiPr2)2ZrCl2(THF). Addition of 2,6-dimethylphenylisocyanide to these alkyl derivatives generates the corresponding mono iminoacyl alkyl zirconium complexes. On thermolysis, the iminoacyl moiety containing a benzyl substituent undergoes rearrangement to yield a new complex that contains an alkene-amido fragment. Mechanistic studies point to a 1,2 hydrogen shift as the rate-determining step.

Sign in / Sign up

Export Citation Format

Share Document