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

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...

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Published inDalton transactions : an international journal of inorganic chemistry Vol. 44; no. 27; pp. 12326 - 12337
Main Authors Bakewell, Clare, Fateh-Iravani, Giovanna, Beh, Daniel W, Myers, Dominic, Tabthong, Sittichoke, Hormnirun, Pimpa, White, Andrew J P, Long, Nicholas, Williams, Charlotte K
Format Journal Article
LanguageEnglish
Published England 21.07.2015
Subjects
Aluminium
Aluminum
Diffraction
Initiators
NMR spectroscopy
Polymerization
Titanium
Zinc
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Summary: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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ISSN:1477-9226
1477-9234
DOI:10.1039/c5dt00192g