Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide

Clare Bakewell; Giovanna Fateh-Iravani; Daniel W. Beh; Dominic Myers; Sittichoke Tabthong; Pimpa Hormnirun; Andrew J.P. White; Nicholas Long; Charlotte K. Williams

doi:10.1039/c5dt00192g

Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide

Clare Bakewell, Giovanna Fateh-Iravani, Daniel W. Beh, Dominic Myers, Sittichoke Tabthong, Pimpa Hormnirun, Andrew J.P. White, Nicholas Long^*, Charlotte K. Williams

^*Corresponding author for this work

Chemistry

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Abstract

The preparation and characterization of a series of 8-hydroxyquinoline ligands and their complexes with Ti(IV), Al(III) and Zn(II) centres is presented. The complexes are characterized using NMR spectroscopy, elemental analysis and, in some cases, by single crystal X-ray diffraction experiments. The complexes are compared as initiators for the ring-opening polymerization of racemic-lactide; all the complexes show moderate/good rates and high levels of polymerization control. In the case of the titanium or aluminium complexes, moderate iso-selectivity is observed (P_i = 0.75), whereas in the case of the zinc complexes, moderate hetero-selectivity is observed (P_s = 0.70).

Original language	English
Pages (from-to)	12326-12337
Number of pages	12
Journal	Dalton Transactions
Volume	44
Issue number	27
DOIs	https://doi.org/10.1039/c5dt00192g
Publication status	Published - 21 Jul 2015

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title = "Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide",

abstract = "The preparation and characterization of a series of 8-hydroxyquinoline ligands and their complexes with Ti(IV), Al(III) and Zn(II) centres is presented. The complexes are characterized using NMR spectroscopy, elemental analysis and, in some cases, by single crystal X-ray diffraction experiments. The complexes are compared as initiators for the ring-opening polymerization of racemic-lactide; all the complexes show moderate/good rates and high levels of polymerization control. In the case of the titanium or aluminium complexes, moderate iso-selectivity is observed (Pi = 0.75), whereas in the case of the zinc complexes, moderate hetero-selectivity is observed (Ps = 0.70).",

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doi = "10.1039/c5dt00192g",

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T1 - Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide

AU - Bakewell, Clare

AU - Fateh-Iravani, Giovanna

AU - Beh, Daniel W.

AU - Myers, Dominic

AU - Tabthong, Sittichoke

AU - Hormnirun, Pimpa

AU - White, Andrew J.P.

AU - Long, Nicholas

AU - Williams, Charlotte K.

PY - 2015/7/21

Y1 - 2015/7/21

N2 - The preparation and characterization of a series of 8-hydroxyquinoline ligands and their complexes with Ti(IV), Al(III) and Zn(II) centres is presented. The complexes are characterized using NMR spectroscopy, elemental analysis and, in some cases, by single crystal X-ray diffraction experiments. The complexes are compared as initiators for the ring-opening polymerization of racemic-lactide; all the complexes show moderate/good rates and high levels of polymerization control. In the case of the titanium or aluminium complexes, moderate iso-selectivity is observed (Pi = 0.75), whereas in the case of the zinc complexes, moderate hetero-selectivity is observed (Ps = 0.70).

AB - The preparation and characterization of a series of 8-hydroxyquinoline ligands and their complexes with Ti(IV), Al(III) and Zn(II) centres is presented. The complexes are characterized using NMR spectroscopy, elemental analysis and, in some cases, by single crystal X-ray diffraction experiments. The complexes are compared as initiators for the ring-opening polymerization of racemic-lactide; all the complexes show moderate/good rates and high levels of polymerization control. In the case of the titanium or aluminium complexes, moderate iso-selectivity is observed (Pi = 0.75), whereas in the case of the zinc complexes, moderate hetero-selectivity is observed (Ps = 0.70).

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U2 - 10.1039/c5dt00192g

DO - 10.1039/c5dt00192g

M3 - Article

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SN - 1477-9226

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JO - Dalton Transactions

JF - Dalton Transactions

IS - 27

ER -

Comparing a series of 8-quinolinolato complexes of aluminium, titanium and zinc as initiators for the ring-opening polymerization of rac-lactide

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