Journal
POLYHEDRON
Volume 146, Issue -, Pages 129-135Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2018.02.029
Keywords
Siloxane Schiff base; Metal complexes; X-ray structure; Photophysical properties; Centro-symmetrical dimer
Categories
Funding
- Ministry of Research and Innovation, CNCS - UEFISCDI [PN-III-P2-2.1-PED-2016, 130PED/2017]
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In this paper we describe the synthesis and characterization of three metal complexes, namely CuL(Id3c), NiL(Id4c) and MnL(Id6c), obtained from a Schiff base ligand containing a flexible tetramethyldisiloxane group. The molecular structures of the metal complexes are determined by X-ray single-crystal diffraction analysis, FT-IR and UV-vis spectroscopy and elemental analysis. The inability of the tetramethyldisiloxane units to be involved in H-bond formation hinders the structure packing. Centro-symmetrical dimers of NiL(Id4c) and MnL(Id6c) are formed through pi-pi stacking interactions between the aromatic rings or by weak C-H center dot center dot center dot O intermolecular contacts in CuL(Id3c). The optical properties of the ligand and metal complexes are reported and discussed in relation to their structures. (C) 2018 Elsevier Ltd. All rights reserved.
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