title: Copper(II) complexes with imino phenoxide ligands: synthesis, characterization, and their application as catalysts for the ring-opening polymerization ofrac-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 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 ofrac-lactide yielding polymers with moderate molecular weights and moderately broad molecular weight distributions.
authors: Institute of Inorganic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria ; Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar 800 013 India.
authors: Mrinmay
authors: M
authors: Mandal
authors: Institute of Inorganic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria.
authors: Kerstin
authors: K
authors: Oppelt
authors: Institute for Chemical Technology of Organic Materials, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria.
authors: Manuela
authors: M
authors: List
authors: Institute of Polymer Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria.
authors: Ian
authors: I
authors: Teasdale
authors: Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600 036 India.
authors: Debashis
authors: D
authors: Chakraborty
authors: Institute of Inorganic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria.
authors: Uwe
authors: 0000-0003-0662-2866
authors: U
authors: Monkowius
keywords: Copper; Crystal structure; Cyclic voltammetry; Imino phenoxide; Poly(lactic acid); ROP; rac-Lactide