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Volume 2, Issue 1
  • ISSN: 2210-299X
  • E-ISSN: 2210-3007
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Abstract

Background:

The ring-opening polymerization (ROP) reaction has provided an efficient and convenient route to prepare polyesters of high molecular weight, low polydispersity index, and high optical purity. The poly(-caprolactone) (PCL) and poly(lactide) (PLA) were prepared through ROP reaction of -caprolactone and D, L-lactide, respectively. These compounds have a huge industrial demand and become an interest among the scientific community to develop more economically and eco-friendly catalysts for ROP reactions.

Methods:

Three Schiff base ligands, 2-((benzo[]thiazole-2-ylimino)methyl)phenol, ; -(1-benzo[]thiazole-2-ylimino)ethyl)phenol, ; and 2-((benzo[]thiazole-2-ylimino)methyl)-5-methoxyphenol, ; were prepared by the reaction of 2-aminobenzothiazole with 2-hydroxybenzaldehyde, 2-hydroxyacetophenone and 2-hydroxy-4-methoxybenzaldehyde in 1:1 molar ratio. In anticipation of interesting stereochemistry, reactivity, and catalytic potential against -caprolactone polymerization, three Titanium(IV) complexes () of these Schiff base ligands were synthesized. All the prepared compounds were characterized by elemental analysis, molar conductance, FT-IR, UV-Vis, 1H-NMR, 13C{1H}-NMR and FAB-Mass spectroscopic technique. Geometry was optimized with the help of DFT.

Results:

Complex gives a much higher yield (87.7%) in comparison to and . The order of catalytic efficiency for complexes is >>. With the increase in temperature, the % yield was found to decrease, and results are in support of moderate to good potency of synthesized catalysts.

Conclusion:

Complexes were screened for catalytic potency against -Caprolactone polymerization reaction. A most plausible mechanism for the polymerization was also proposed.

© 2024 The Author(s). Published by Bentham Science Publisher.
This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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2024-06-24
2025-01-31

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Catalytic Investigation of ε-caprolactone Polymerization through Schiff Base Titanium (IV) Complexes
Curr. Indian Sci. 2, e2210299X302408 (2024); https://doi.org/10.2174/012210299X302408240607073134
/content/journals/cis/10.2174/012210299X302408240607073134
/content/journals/cis/10.2174/012210299X302408240607073134
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  • Article Type:     Research Article
Keyword(s): Catalytic activity; Polymerization; ROP; Schiff base; Titanium (VI); ε-caprolactone

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