Unprecedented Fluorescent Dinuclear CoII and ZnII Coordination Compounds with a Symmetric Bis(salamo)-Like Tetraoxime.

Lin-Wei Zhang,Fei Wang,Wen-Kui Dong,Ling-Zhi Liu

doi:10.3390/molecules23051141

Lin-Wei Zhang, Fei Wang + Show 2 more

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https://doi.org/10.3390/molecules23051141

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Journal: Molecules (Basel, Switzerland)	Publication Date: May 10, 2018
Citations: 38	License type: CC BY 4.0

Affiliation: Lanzhou Jiaotong University

Abstract

Two unprecedented homometallic CoII and ZnII coordination compounds, [M2(L)(OCH3)][M2(L)(OAc)] (MII = CoII (1) and ZnII (2)), with a novel symmetric bis(salamo)-like tetraoxime ligand H3L were synthesized and characterized by elemental analyses, infrafred (IR), ultraviolet–visible spectroscopy (UV-Vis), fluorescent spectra and single-crystal X-ray diffraction analyses. The unit cell of the two coordination compounds contains two crystallographically and chemically independent dinuclear coordination compounds. In the two coordination compounds, three metal ions are five-coordinated, formed two square pyramidal and a trigonal bipyramidal geometries, and the other metal ion is a hexacoordinate octahedral configuration. In addition, the coordination compound 1 forms a 3D supramolecular structure, and the coordination compound 2 forms a 0D dimer structure by the inter-molecular hydrogen bond interactions. Meanwhile, the fluorescence spectra of the coordination compounds 1 and 2 were also measured and discussed.

Highlights

IntroductionSalen-like ligands play an important role in the field of inorganic chemistry [1,2,3,4,5,6,7,8]
Salen-like ligands play an important role in the field of inorganic chemistry [1,2,3,4,5,6,7,8]. They are synthesized by the interaction of diamines with salicylaldehyde or its derivatives, and can coordinate to transition metal ions in a tetradentate fashion to obtain mono- or polynuclear metal coordination compounds [9,10,11,12]
X-ray crystallographic analyses reveal that the structure of the coordination compound 2 is similar to that of the coordination compound 1

Summary

Introduction

Salen-like ligands play an important role in the field of inorganic chemistry [1,2,3,4,5,6,7,8]. They are synthesized by the interaction of diamines with salicylaldehyde or its derivatives, and can coordinate to transition metal ions in a tetradentate fashion to obtain mono- or polynuclear metal coordination compounds [9,10,11,12]. In our previous studies on salamo-type metal complexes, we exchanged salicylaldehyde for its derivatives to obtain some new salamo-like transition metal coordination compounds with different structures [28,29,30,31,32]

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Results

Conclusion