Cargando…
Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide
ABSTRACT: Four new copper complexes based on bidentate imino phenoxide ligands were synthesized and characterized by IR, UV–Vis spectroscopy, ESI mass spectrometry, single crystal X-ray diffraction, and electrochemistry. The crystal structures revealed that the copper(II) atoms are surrounded by phe...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Vienna
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5063905/ https://www.ncbi.nlm.nih.gov/pubmed/27795584 http://dx.doi.org/10.1007/s00706-016-1830-7 |
_version_ | 1782460058362183680 |
---|---|
author | Mandal, Mrinmay Oppelt, Kerstin List, Manuela Teasdale, Ian Chakraborty, Debashis Monkowius, Uwe |
author_facet | Mandal, Mrinmay Oppelt, Kerstin List, Manuela Teasdale, Ian Chakraborty, Debashis Monkowius, Uwe |
author_sort | Mandal, Mrinmay |
collection | PubMed |
description | ABSTRACT: Four new copper complexes based on bidentate imino phenoxide ligands were synthesized and characterized by IR, UV–Vis spectroscopy, ESI mass spectrometry, single crystal X-ray diffraction, and electrochemistry. The crystal structures revealed that the copper(II) atoms are surrounded by phenolate oxygen and imine nitrogen atoms of two ligands in a distorted square-planar geometry. The existence of ligand-centered, as well as Cu(II)-centered quasi-reversible and reversible redox reactions are observed in the cyclic voltammetry experiments of all the complexes. All complexes are able to catalyze the ring-opening polymerization of rac-lactide yielding polymers with moderate molecular weights and moderately broad molecular weight distributions. GRAPHICAL ABSTRACT: [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00706-016-1830-7) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-5063905 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Springer Vienna |
record_format | MEDLINE/PubMed |
spelling | pubmed-50639052016-10-28 Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide Mandal, Mrinmay Oppelt, Kerstin List, Manuela Teasdale, Ian Chakraborty, Debashis Monkowius, Uwe Monatsh Chem Original Paper ABSTRACT: Four new copper complexes based on bidentate imino phenoxide ligands were synthesized and characterized by IR, UV–Vis spectroscopy, ESI mass spectrometry, single crystal X-ray diffraction, and electrochemistry. The crystal structures revealed that the copper(II) atoms are surrounded by phenolate oxygen and imine nitrogen atoms of two ligands in a distorted square-planar geometry. The existence of ligand-centered, as well as Cu(II)-centered quasi-reversible and reversible redox reactions are observed in the cyclic voltammetry experiments of all the complexes. All complexes are able to catalyze the ring-opening polymerization of rac-lactide yielding polymers with moderate molecular weights and moderately broad molecular weight distributions. GRAPHICAL ABSTRACT: [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00706-016-1830-7) contains supplementary material, which is available to authorized users. Springer Vienna 2016-09-05 2016 /pmc/articles/PMC5063905/ /pubmed/27795584 http://dx.doi.org/10.1007/s00706-016-1830-7 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Original Paper Mandal, Mrinmay Oppelt, Kerstin List, Manuela Teasdale, Ian Chakraborty, Debashis Monkowius, Uwe Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide |
title | Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide |
title_full | Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide |
title_fullStr | Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide |
title_full_unstemmed | Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide |
title_short | Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide |
title_sort | copper(ii) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization of rac-lactide |
topic | Original Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5063905/ https://www.ncbi.nlm.nih.gov/pubmed/27795584 http://dx.doi.org/10.1007/s00706-016-1830-7 |
work_keys_str_mv | AT mandalmrinmay copperiicomplexeswithiminophenoxideligandssynthesischaracterizationandtheirapplicationascatalystsfortheringopeningpolymerizationofraclactide AT oppeltkerstin copperiicomplexeswithiminophenoxideligandssynthesischaracterizationandtheirapplicationascatalystsfortheringopeningpolymerizationofraclactide AT listmanuela copperiicomplexeswithiminophenoxideligandssynthesischaracterizationandtheirapplicationascatalystsfortheringopeningpolymerizationofraclactide AT teasdaleian copperiicomplexeswithiminophenoxideligandssynthesischaracterizationandtheirapplicationascatalystsfortheringopeningpolymerizationofraclactide AT chakrabortydebashis copperiicomplexeswithiminophenoxideligandssynthesischaracterizationandtheirapplicationascatalystsfortheringopeningpolymerizationofraclactide AT monkowiusuwe copperiicomplexeswithiminophenoxideligandssynthesischaracterizationandtheirapplicationascatalystsfortheringopeningpolymerizationofraclactide |