Monomeric and dimeric Al(III) complexes for the production of polylactide

Research output: Contribution to journalArticle

  • 8 Citations

Abstract

A series of monometallic and bimetallic Al(III) complexes with substituted naphthyl based Schiff base ligands have been prepared and characterised. When 1-aminonaphthalene based ligands were reacted with AlMe3 monometallic complexes were isolated, however, with 1,5 and 1,8- diaminonaphthalene based ligands bimetallic complexes were formed. In all cases 4-coordinate tetrahedral Al(III) centres were observed in the solid state and in solution. There was little difference in rate of polymerisation of rac-lactide between the monometallic and bimetallic complexes based on 1,5-diaminonaphthalene. However, for the 1,8-diaminonaphthalene the complex was an order of magnitude faster than the monometallic and the analogous 1,5-system. Moreover, this complex was active at room temperature, which is rare for aluminium initiators, and PLA with a high degree (Pm = 0.82) of isotacticity was observed.
LanguageEnglish
Pages13846-13852
JournalDalton Transactions
Volume45
Issue number35
Early online date4 Aug 2016
DOIs
StatusPublished - 21 Sep 2016

Fingerprint

Ligands
1-Naphthylamine
Schiff Bases
Aluminum
Polymerization
poly(lactide)
Temperature
1,8-diaminonaphthalene
1,5-diaminonaphthalene
dilactide

Cite this

Monomeric and dimeric Al(III) complexes for the production of polylactide. / Kirk, Sarah M.; Quilter, Helena C.; Buchard, Antoine; Thomas, Lynne H.; Kociok-Kohn, Gabriele; Jones, Matthew D.

In: Dalton Transactions , Vol. 45, No. 35, 21.09.2016, p. 13846-13852.

Research output: Contribution to journalArticle

@article{4d615a74602b4ef78901f4279112647c,
title = "Monomeric and dimeric Al(III) complexes for the production of polylactide",
abstract = "A series of monometallic and bimetallic Al(III) complexes with substituted naphthyl based Schiff base ligands have been prepared and characterised. When 1-aminonaphthalene based ligands were reacted with AlMe3 monometallic complexes were isolated, however, with 1,5 and 1,8- diaminonaphthalene based ligands bimetallic complexes were formed. In all cases 4-coordinate tetrahedral Al(III) centres were observed in the solid state and in solution. There was little difference in rate of polymerisation of rac-lactide between the monometallic and bimetallic complexes based on 1,5-diaminonaphthalene. However, for the 1,8-diaminonaphthalene the complex was an order of magnitude faster than the monometallic and the analogous 1,5-system. Moreover, this complex was active at room temperature, which is rare for aluminium initiators, and PLA with a high degree (Pm = 0.82) of isotacticity was observed.",
author = "Kirk, {Sarah M.} and Quilter, {Helena C.} and Antoine Buchard and Thomas, {Lynne H.} and Gabriele Kociok-Kohn and Jones, {Matthew D.}",
year = "2016",
month = "9",
day = "21",
doi = "10.1039/C6DT02861F",
language = "English",
volume = "45",
pages = "13846--13852",
journal = "Dalton Transactions",
issn = "1477-9226",
publisher = "Royal Society of Chemistry",
number = "35",

}

TY - JOUR

T1 - Monomeric and dimeric Al(III) complexes for the production of polylactide

AU - Kirk,Sarah M.

AU - Quilter,Helena C.

AU - Buchard,Antoine

AU - Thomas,Lynne H.

AU - Kociok-Kohn,Gabriele

AU - Jones,Matthew D.

PY - 2016/9/21

Y1 - 2016/9/21

N2 - A series of monometallic and bimetallic Al(III) complexes with substituted naphthyl based Schiff base ligands have been prepared and characterised. When 1-aminonaphthalene based ligands were reacted with AlMe3 monometallic complexes were isolated, however, with 1,5 and 1,8- diaminonaphthalene based ligands bimetallic complexes were formed. In all cases 4-coordinate tetrahedral Al(III) centres were observed in the solid state and in solution. There was little difference in rate of polymerisation of rac-lactide between the monometallic and bimetallic complexes based on 1,5-diaminonaphthalene. However, for the 1,8-diaminonaphthalene the complex was an order of magnitude faster than the monometallic and the analogous 1,5-system. Moreover, this complex was active at room temperature, which is rare for aluminium initiators, and PLA with a high degree (Pm = 0.82) of isotacticity was observed.

AB - A series of monometallic and bimetallic Al(III) complexes with substituted naphthyl based Schiff base ligands have been prepared and characterised. When 1-aminonaphthalene based ligands were reacted with AlMe3 monometallic complexes were isolated, however, with 1,5 and 1,8- diaminonaphthalene based ligands bimetallic complexes were formed. In all cases 4-coordinate tetrahedral Al(III) centres were observed in the solid state and in solution. There was little difference in rate of polymerisation of rac-lactide between the monometallic and bimetallic complexes based on 1,5-diaminonaphthalene. However, for the 1,8-diaminonaphthalene the complex was an order of magnitude faster than the monometallic and the analogous 1,5-system. Moreover, this complex was active at room temperature, which is rare for aluminium initiators, and PLA with a high degree (Pm = 0.82) of isotacticity was observed.

UR - http://dx.doi.org/10.1039/C6DT02861F

U2 - 10.1039/C6DT02861F

DO - 10.1039/C6DT02861F

M3 - Article

VL - 45

SP - 13846

EP - 13852

JO - Dalton Transactions

T2 - Dalton Transactions

JF - Dalton Transactions

SN - 1477-9226

IS - 35

ER -