Nickel and palladium complexes with fluorinated alkyl substituted alpha-diimine ligands for living/controlled olefin polymerization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43915558" target="_blank" >RIV/60461373:22310/18:43915558 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388963:_____/18:00489953 RIV/60461373:22810/18:43915558 RIV/00216208:11310/18:10374492

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c8py00201k" target="_blank" >http://dx.doi.org/10.1039/c8py00201k</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c8py00201k" target="_blank" >10.1039/c8py00201k</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nickel and palladium complexes with fluorinated alkyl substituted alpha-diimine ligands for living/controlled olefin polymerization

Popis výsledku v původním jazyce

A series of six nickel and two palladium novel complexes bearing alpha-diimine ligands with fluorinated alkyl substituents in para-aryl positions was prepared. Two nickel complexes were structurally characterized by X-ray diffraction. Upon activation by methylaluminoxane or borate, the complexes were tested in ethene, propene, and hex-1-ene polymerization using toluene and chlorobenzene. Propene and hex-1-ene polymerization initiated by nickel complexes and ethene polymerization initiated by palladium complexes showed living/controlled character and yielded high molar mass polyolefins with narrow molar mass dispersity (D &lt; 1.2). The effect of fluoroalkyl substituents on catalyst activity, thermal stability and chain-walking is only minor. The branching density of polyolefins can be regulated more efficiently by the variation of ortho-aryl and backbone substituents of alpha-diimine ligands. The topology of polyethylenes prepared by palladium complexes at low ethene pressure is dendritic as shown by Mark-Houwink plots and g&apos; values obtained from SEC with viscometric detection. The solubility of most of the complexes in fluorinated solvents is limited with the exception of palladium methyl chloride derivatives which suggest the promising method for further design of catalysts suitable for interphase polymerization.

Název v anglickém jazyce

Nickel and palladium complexes with fluorinated alkyl substituted alpha-diimine ligands for living/controlled olefin polymerization

Popis výsledku anglicky

A series of six nickel and two palladium novel complexes bearing alpha-diimine ligands with fluorinated alkyl substituents in para-aryl positions was prepared. Two nickel complexes were structurally characterized by X-ray diffraction. Upon activation by methylaluminoxane or borate, the complexes were tested in ethene, propene, and hex-1-ene polymerization using toluene and chlorobenzene. Propene and hex-1-ene polymerization initiated by nickel complexes and ethene polymerization initiated by palladium complexes showed living/controlled character and yielded high molar mass polyolefins with narrow molar mass dispersity (D &lt; 1.2). The effect of fluoroalkyl substituents on catalyst activity, thermal stability and chain-walking is only minor. The branching density of polyolefins can be regulated more efficiently by the variation of ortho-aryl and backbone substituents of alpha-diimine ligands. The topology of polyethylenes prepared by palladium complexes at low ethene pressure is dendritic as shown by Mark-Houwink plots and g&apos; values obtained from SEC with viscometric detection. The solubility of most of the complexes in fluorinated solvents is limited with the exception of palladium methyl chloride derivatives which suggest the promising method for further design of catalysts suitable for interphase polymerization.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GC15-15887J" target="_blank" >GC15-15887J: KATALYZÁTORY PRO ŘÍZENÉ VĚTVENÍ POLYOLEFINŮ. PROPOJENÍ TEORIE A EXPERIMENTU.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

POLYMER CHEMISTRY

ISSN

1759-9954

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

1234-1248

Kód UT WoS článku

000428791700010

EID výsledku v databázi Scopus

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