A series of dimethyl aluminum complexes of the type [E,O]AlMe2 stabilized by phenoxy-imine, phenoxy-thioether and phenoxy-amine ligands have been tested as catalysts for the ring-opening copolymerization of epoxides and anhydrides. All complexes revealed to be active in the copolymerization of cyclohexene oxide with succinic anhydride showing activities higher than pentacoordinate salen aluminum complexes. Interestingly, these complexes revealed to be active in the copolymerization of limonene oxide with phthalic anhydride. A moderate influence of the ligand structure on the efficiency and selectivity of the catalyst was also observed. Some mechanistic insights have been gained through NMR studies allowing the identification of a zwitterionic species formed in the initiating step of the polymerization reaction.

Tetracoordinate aluminum complexes bearing phenoxy-based ligands as catalysts for epoxide/anhydride copolymerization: Some mechanistic insights

Isnard F.
Membro del Collaboration Group
;
SANTULLI, FEDERICA
Membro del Collaboration Group
;
Cozzolino M.
Membro del Collaboration Group
;
Lamberti M.
Membro del Collaboration Group
;
Pellecchia C.
Membro del Collaboration Group
;
Mazzeo M.
Membro del Collaboration Group
2019-01-01

Abstract

A series of dimethyl aluminum complexes of the type [E,O]AlMe2 stabilized by phenoxy-imine, phenoxy-thioether and phenoxy-amine ligands have been tested as catalysts for the ring-opening copolymerization of epoxides and anhydrides. All complexes revealed to be active in the copolymerization of cyclohexene oxide with succinic anhydride showing activities higher than pentacoordinate salen aluminum complexes. Interestingly, these complexes revealed to be active in the copolymerization of limonene oxide with phthalic anhydride. A moderate influence of the ligand structure on the efficiency and selectivity of the catalyst was also observed. Some mechanistic insights have been gained through NMR studies allowing the identification of a zwitterionic species formed in the initiating step of the polymerization reaction.
File in questo prodotto:
File Dimensione Formato  
cat sci tech 2019.pdf

accesso aperto

Descrizione: Articolo principale
Tipologia: Documento in Pre-print (manoscritto inviato all'editore, precedente alla peer review)
Licenza: Creative commons
Dimensione 704.74 kB
Formato Adobe PDF
704.74 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4731346
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 15
social impact