Buta Ildikó

Cretu Carmen

Popa Evelyn

Szerb Elisabeta I.

English

University of Szeged

28th International Symposium on Analytical and Environmental Problems  14  NEW 3d METAL COORDINATION COMPLEXES WITH N- AND O- DONOR LIGANDS: SYNTHESIS, STRUCTURAL CHARACTERIZATION AND OPTICAL PROPERTIES  Ildiko Bută, Carmen Cretu, Evelyn Popa, Elisabeta I. Szerb  “Coriolan Dragulescu” Institute of Chemistry, Timisoara, Romania e-mail: ildiko.buta@gmail.com  Abstract Liquid crystals are anisotropic fluids, where the combination of flow and molecular ordering confers interesting optical, dielectric, and visco-elastic properties [1]. Liquid crystals have been intensively studied as functional materials in the fields of energy, water, photonics, actuation, sensing, and biotechnology [2]. Here, we present the synthesis of two isostructural NiII and ZnII coordination complexes based on N^N-chelating ligands (2,2’-bipyridine and 1,10-phenanthroline) and an O-donor ligand (3,4,5-tridodecyloxybenzoate) and their structural characterization by spectroscopic and analytic methods.     Figure 1. Proposed structures of NiII and ZnII complexes  The complexes self-assemble into liquid crystalline supramolecular architectures, their mesomorphic properties being investigated by a combination of Polarized Optical Microscopy (POM) and Differential Scanning Calorimetry (DSC) techniques. The metallomesogens show typical columnar textures and are liquid crystalline over a wide range of temperatures. Interestingly, the mixtures obtained by simply mixing the complexes in different molar ratios show different thermal and mesomorphic behaviors comparative with their precursor complexes, depending on their composition. Preliminary results regarding the emission properties of the complexes and the new materials are presented.  References 1. M. Hird, Chem. Soc. Rev. 36 (2007) 2070. 2. J. Uchida, B. Soberats, M. Gupta,T. Kato, Adv. Matt. 34 (2022) 109063.  Acknowledgements: We thank the Romanian Academy, Institute of Chemistry “Coriolan Dragulescu” (Project 4.1.3) for financial support. This work was supported by a grant of the Romanian Ministry of Education and Research, CNCS - UEFISCDI, project number PN-III-P4-ID-PCE-2020-1958, within PNCDI III.   

New 3d metal coordination complexes with N- and O- donor ligands : synthesis, structural characterization and optical properties : [abstract]

http://acta.bibl.u-szeged.hu/78439/1/proceedings_of_isaep_2022_014.pdf

New 3d metal coordination complexes with N- and O- donor ligands : synthesis, structural characterization and optical properties : [abstract]

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