Increasing the Activity of Copper Guanidine Quinoline Catalysts: Substitution at the Quinoline Backbone Leads to Highly Active Complexes for ATRP.
In: Zeitschrift für Anorganische und Allgemeine Chemie, Jg. 647 (2021-04-26), Heft 8, S. 832-842
Online
academicJournal
Zugriff:
Copper bromide complexes with the ligands TMG6NO2qu, TMG6Brqu, TMG6Methoxyqu, TMG6NMe2qu, TMG6EHOqu and TMG6dBAqu were examined regarding their activity in atom transfer radical polymerization (ATRP). The ligands were inspired by 1,1,3,3‐tetramethyl‐2‐(quinolin‐8‐yl)guanidine (TMGqu) and the substituents have been chosen with a large range between electron withdrawing and donating abilities. The donor properties of the ligands can be strongly influenced and further highly active catalysts based on these systems can be obtained. The ligands with strong donating moieties were in addition modified by alkyl groups to increase the solubility in apolar monomers like styrene. CuI and CuII bromide complexes were crystallised and the structural data correlated to the different substituents and the catalyst activity. The electrochemical potentials E1/2, the equilibrium constants KATRP and rate constants kact and kdeact were determined. Polymerizations of styrene were conducted in solution whereas the catalyst based on TMG6EHOqu shows a good solubility and performance in bulk. [ABSTRACT FROM AUTHOR]
Titel: |
Increasing the Activity of Copper Guanidine Quinoline Catalysts: Substitution at the Quinoline Backbone Leads to Highly Active Complexes for ATRP.
|
---|---|
Autor/in / Beteiligte Person: | Kröckert, Konstantin W. ; Mannsperger, Johannes S. ; Rösener, Thomas ; Hoffmann, Alexander ; Herres‐Pawlis, Sonja |
Link: | |
Zeitschrift: | Zeitschrift für Anorganische und Allgemeine Chemie, Jg. 647 (2021-04-26), Heft 8, S. 832-842 |
Veröffentlichung: | 2021 |
Medientyp: | academicJournal |
ISSN: | 0044-2313 (print) |
DOI: | 10.1002/zaac.202000461 |
Schlagwort: |
|
Sonstiges: |
|