Synthesis, characterisation and theoretical studies of a series of Iridium (III) heteroleptic complexes with Schiff base ligands
| Autor: | Satyanarayan Pal, Bimal Chandra Singh, Sahadev Barik, Kahnu Charan Pradhan, Priyabrat Mohapatra, Hemanta K. Kisan |
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| Rok vydání: | 2020 |
| Předmět: |
Schiff base
Absorption spectroscopy 010405 organic chemistry Ligand Organic Chemistry chemistry.chemical_element 010402 general chemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry Inorganic Chemistry chemistry.chemical_compound Crystallography Salicylaldehyde chemistry Pyridine Molecule Iridium HOMO/LUMO Spectroscopy |
| Zdroj: | Journal of Molecular Structure. 1211:128058 |
| ISSN: | 0022-2860 |
| Popis: | A series of Iridium (III) complexes of general formula [Ir(ppy)2(L)]0/+ (ppy = 2-phenyl pyridine, L = Schiff base) were synthesised from the dichloro bridged dimeric starting material, [(ppy)2Ir(μ-Cl)2Ir(ppy)2]. Three Schiff bases used as ligand were obtained from condensation of 2-amino phenol with benzaldehyde (L1), salicylaldehyde with 2-aminopyridine (L2) and pyridine 2-aldehyde with 2-aminopyridine (L3). All the complexes were characterised by IR, 1H NMR, electronic absorption spectroscopy and cyclic voltammetry studies. Molecular structure of two of these complexes were determined by single crystal X-ray structure analysis. Complexes displayed several weak absorptions in visible region in the range of 401–499 nm. TDDFT calculations on complexes revealed the ligand orbital dominance in both HOMO and LUMO orbitals and subsequent ligand centred transitions were observed in absorption spectra. |
| Databáze: | OpenAIRE |
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