Aluminum Alkyl Complexes Bearing Salicylaldiminato Ligands: Versatile Initiators in the Ring-Opening Polymerization of Cyclic Esters

Fuoco, Tiziana; Pappalardo, Daniela

doi:10.3390/catal7020064

Cited by 83biodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysisOrganometallic Complex Synthesis and Catalysis

Aluminum Alkyl Complexes Bearing Salicylaldiminato Ligands: Versatile Initiators in the Ring-Opening Polymerization of Cyclic Esters

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Fuoco, Tiziana, Pappalardo, Daniela·2017·Catalysts

DOI 10.3390/catal7020064

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Abstract

Linear aliphatic polyesters are degradable thermoplastic polymers, which can be obtained by ring-opening polymerization (ROP) of cyclic esters through a coordination-insertion mechanism. Aluminum based organometallic complexes have a leading position as efficient catalysts for this polymerization process. Aluminumalkyl complexes bearing salicylaldiminato ligands, although less explored, have been shown to be efficient and versatile catalysts for the ROP of various cyclic esters. These species have the potential to function as active catalysts in the ROP because of their less coordinatively saturated nature with respect to analogous SALEN-type complexes. They have been used as efficient catalysts in the ROP of commercially available cyclic esters, such as ε-caprolactone, l-lactide, rac-lactide, and glycolide. Moreover, they resulted in efficient catalysts for the ROP of cyclic esters with large ring-size and for the ROP of functionalized lactide. Furthermore, they have been used in the co- and ter-polymerization of various cyclic esters affording well controlled polymerization and a plethora of microstructural architectures, ranging from random to block to multiblock.

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Pappalardo et al. described dimethyl(salicylaldiminato)aluminium compounds in ROP of caprolactone and lactides, disclosing well-controlled polymerization with absence of transesterification and living behavior when the phenyl substituent on the phenoxyimine ligand was perfluorinated.
“Pappalardo et al. [20,29] have described dimethyl(salicylaldiminato)aluminium compounds in the ring-opening polymerization of caprolactone and lactides disclosing a well-controlled polymerization with absence of transesterification reaction and a certain living behavior of the polymerization, when the phenyl substituent on the phenoxyimine ligand of the catalyst was perfluorurated.”
From Thermo-Rheological and Shape Memory Properties of Block and Random Copolymers of Lactide and ε-Caprolactone (2021) · cites this paper as [29]
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Authors: Fuoco, T., & Pappalardo, D.
Affiliations: KTH Royal Institute of Technology (SE)
University of Sannio (IT)
Corresponding author: Pappalardo, Daniela
ORCID: Fuoco, Tiziana
Pappalardo, Daniela
Venue: Catalysts
Publisher: MDPI AG
Published: 2017-02-16
Volume: 7
Issue: 2
Pages: 64
ISSN: 2073-4344 (ISSN-L)
DOI: 10.3390/catal7020064
OpenAlex: W2588873629
Cited by: 83
References: 68
Citations by year: 2026: 6 · 2025: 4 · 2024: 2 · 2023: 10 · 2022: 8 · 2021: 15 · 2020: 13 · 2019: 11 · 2018: 9 · 2017: 5
FWCI: 3.74
Type: journal article
Language: en
Open access: gold
doi.org
Licence: cc-by
creativecommons.org/licenses/by/4.0/ (vor)
Locations: Catalysts (publishedVersion, cc-by)
DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Topics: Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
Physical Sciences › Chemistry › Organic Chemistry › Organometallic Complex Synthesis and Catalysis
Keywords: salicylaldiminato ligands, ring-opening polymerization, cyclic esters, polyesters, ε-caprolactone, lactide, glycolide, coordination-insertion mechanism, copolymerization, block copolymers, microstructure control, biodegradable thermoplastics

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Aluminum Alkyl Complexes Bearing Salicylaldiminato Ligands: Versatile Initiators in the Ring-Opening Polymerization of Cyclic Esters

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