Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring opening polymerization of rac-lactide. Depending on the lig-and employed and stoichiometry of the complexation, structures of the form Al(X)2Me or Al(X)Me2 were isolated. Interest-ingly Al(2)2Me and Al(2)Me2 produce PLA with a strong isotactic bias (Pm up to 0.80) whereas all other complexes produced atactic PLA. This is in contrast to recent studies on similar salan ligand systems. PLA with predictable molecular weights and narrow distributions were achieved. The results are discussed in terms of steric and electronic properties of the ligands.
Original languageEnglish
Pages (from-to)1719-1724
JournalOrganometallics
Volume37
Issue number11
Early online date22 May 2018
DOIs
Publication statusPublished - 11 Jun 2018

Fingerprint

Ring opening polymerization
Aluminum
polymerization
Ligands
aluminum
ligands
rings
exploitation
Complexation
Stoichiometry
Electronic properties
Nuclear magnetic resonance spectroscopy
stoichiometry
molecular weight
Molecular weight
solid state
nuclear magnetic resonance
electronics
spectroscopy
pyrrolidine

Cite this

Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide. / Beament, James; Mahon, Mary; Buchard, Antoine; Jones, Matthew.

In: Organometallics, Vol. 37, No. 11, 11.06.2018, p. 1719-1724.

Research output: Contribution to journalArticle

@article{848a578c0fda44679f2c976bdf1865dd,
title = "Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide",
abstract = "In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring opening polymerization of rac-lactide. Depending on the lig-and employed and stoichiometry of the complexation, structures of the form Al(X)2Me or Al(X)Me2 were isolated. Interest-ingly Al(2)2Me and Al(2)Me2 produce PLA with a strong isotactic bias (Pm up to 0.80) whereas all other complexes produced atactic PLA. This is in contrast to recent studies on similar salan ligand systems. PLA with predictable molecular weights and narrow distributions were achieved. The results are discussed in terms of steric and electronic properties of the ligands.",
author = "James Beament and Mary Mahon and Antoine Buchard and Matthew Jones",
year = "2018",
month = "6",
day = "11",
doi = "10.1021/acs.organomet.8b00161",
language = "English",
volume = "37",
pages = "1719--1724",
journal = "Organometallics",
issn = "0276-7333",
publisher = "American Chemical Society",
number = "11",

}

TY - JOUR

T1 - Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide

AU - Beament, James

AU - Mahon, Mary

AU - Buchard, Antoine

AU - Jones, Matthew

PY - 2018/6/11

Y1 - 2018/6/11

N2 - In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring opening polymerization of rac-lactide. Depending on the lig-and employed and stoichiometry of the complexation, structures of the form Al(X)2Me or Al(X)Me2 were isolated. Interest-ingly Al(2)2Me and Al(2)Me2 produce PLA with a strong isotactic bias (Pm up to 0.80) whereas all other complexes produced atactic PLA. This is in contrast to recent studies on similar salan ligand systems. PLA with predictable molecular weights and narrow distributions were achieved. The results are discussed in terms of steric and electronic properties of the ligands.

AB - In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring opening polymerization of rac-lactide. Depending on the lig-and employed and stoichiometry of the complexation, structures of the form Al(X)2Me or Al(X)Me2 were isolated. Interest-ingly Al(2)2Me and Al(2)Me2 produce PLA with a strong isotactic bias (Pm up to 0.80) whereas all other complexes produced atactic PLA. This is in contrast to recent studies on similar salan ligand systems. PLA with predictable molecular weights and narrow distributions were achieved. The results are discussed in terms of steric and electronic properties of the ligands.

U2 - 10.1021/acs.organomet.8b00161

DO - 10.1021/acs.organomet.8b00161

M3 - Article

VL - 37

SP - 1719

EP - 1724

JO - Organometallics

JF - Organometallics

SN - 0276-7333

IS - 11

ER -