Abstract
A new 1D polymeric copper(II) complex [{Cu(L)(CF3COO)}2]n has been synthesized using a potentially tetradentate Schiff base ligand, HL, ((E)-2-((pyridin-2-yl)methyleneamino)-5-chlorobenzoic acid) and characterized by different spectroscopic methods. Single crystal X-ray structural characterization reveals that the side arm carboxylate group of the coordinated Schiff base exhibits a μ 1,3-bridging mode and connects the neighbouring copper(II) ions leading to a zigzag 1D chain structure where the copper(II) ions display distorted square pyramidal geometries. Variable temperature magnetic susceptibility measurement reveals a weak antiferromagnetic exchange (J = −0.47 ± 0.01 cm−1) prevails between copper(II) ions in the chain mediated by the bridging carboxylate group, is also supported by the room temperature EPR spectral study. Electrochemical property of the complex is also reported.
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Acknowledgements
S. Shit gratefully acknowledges University Grants Commission, New Delhi, India for financial assistance (Minor Research Project No. F. PSW–65/12–13 (ERO)). Thanks are also extended to the University Grants Commission, New Delhi, India for financial assistance (Project No. F.6-6/2013-14/EMERITUS-2013-14-GEN- 2214/(SA-II)) to Prof. S. Mitra as Emeritus Fellow.
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All additional information pertaining to characterization of the ligand and complex using IR spectra (figures S1, S2), electronic spectra (figures S3, S4), and simulated and experimental PXRD patterns of the complex (figure S5) are given in the supporting information available at www.ias.ac.in/chemsci.
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SHIT, S., NANDY, M., RIZZOLI, C. et al. Crystal structure, characterization and magnetic properties of a 1D copper(II) polymer incorporating a Schiff base with carboxylate side arm. J Chem Sci 128, 913–920 (2016). https://doi.org/10.1007/s12039-016-1082-4
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DOI: https://doi.org/10.1007/s12039-016-1082-4