Synthesis, characterization and redox behavior of bis(N-1-adamantanyl- and N-2-adamantanyl-3,5-tBu2-salicylaldiminato)copper(II) complexes
| Autor: | Veli T. Kasumov, Ali İhsan Öztürk, Fevzi Köksal |
|---|---|
| Přispěvatelé: | Ondokuz Mayıs Üniversitesi |
| Rok vydání: | 2007 |
| Předmět: |
spectroscopy
Chemistry Ligand Radical Inorganic chemistry Imine chemistry.chemical_element phenoxyl radical Electrochemistry Redox Copper law.invention Inorganic Chemistry chemistry.chemical_compound Crystallography electrochemistry law bis[N-(adamantyl)-3 5-Bu-t(2)-salicylaldiminato]Cu(II) complexes Materials Chemistry chemical oxidation Reactivity (chemistry) Physical and Theoretical Chemistry Electron paramagnetic resonance |
| Zdroj: | Polyhedron. 26:3129-3135 |
| ISSN: | 0277-5387 |
| Popis: | WOS: 000249001300029 Two new bulky ligands, YNI (1-adamantyl)-3,5-Bu-t(2)-salicylaldimine (1), and N-(2-adamantyl)-3,5-Bu-t,-salicylaidimine (2), and their copper bis-chelate complexes, 3 and 4, have been prepared and their analytical, spectroscopic and magnetic properties, chemical and electrochemical redox reactivity are described. EPR and UV/Vis results [higher g(parallel to)/A(parallel to) , lower energy lambda (nm)] for 3 and 4 suggest a distorted square planar geometry with a higher degree of distortion for 3 than for 4. Chemical oxidation of 1-4 by ACN, on the basis of their EPR and UV/Vis spectra results in the formation of the free 1(center dot+), 2(center dot+) phenoxyl and Cu(II)-phenoxyl radicals complexes [g = 2.0065 (3(center dot+)), 2.0099 (4(center dot+)) and lambda(max) at ca. 430 and 720 nm]. Electrochemical studies have shown that the complexes possess ligand- and copper(II)-centered quasi-reversible and irreversible responses and the more distorted complex 3, having the bulkier 1-adamantyl on the imine nitrogen, was reduced at a more negative potential than the less distorted complex 4. (c) 2007 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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