Synthesis, characterization and electro-spectroelectrochemical studies of four macrocyclic Schiff-base Co(II) complexes having N2O2 set of donor atoms

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dc.authoridtemel, hamdi/0000-0001-9225-7425
dc.authoridyilmaz, ismail/0000-0002-5046-7456
dc.authoridKILIC, Ahmet/0000-0001-9073-4339
dc.authoridIlhan, Salih/0000-0003-0779-2744
dc.contributor.authorYilmaz, Ismail
dc.contributor.authorIlhan, Salih
dc.contributor.authorTemel, Hamdi
dc.contributor.authorKilic, Ahmet
dc.date.accessioned2024-12-24T19:24:37Z
dc.date.available2024-12-24T19:24:37Z
dc.date.issued2009
dc.departmentSiirt Üniversitesi
dc.description.abstractFour macrocyclic Schiff-base cobalt complexes, [CoL1][NO3](2) center dot A 3H(2)O, [CoL2][NO3](2) center dot A 4H(2)O, [CoL3][NO3](2) center dot A 4H(2)O and [CoL4][NO3](2) center dot A 2H(2)O, were synthesized by reaction of salicylaldehyde derivatives with 1,4-bis(3-aminopropoxy)butane or (+/-)-trans-1,2-diaminocyclohexane and Co(NO3)(2) center dot A 6H(2)O by template effect in methanol. The metals to ligand ratio of the complexes were found to be 1:1. The Co(II) complexes are proposed to be tetrahedral geometry. The macrocyclic Co(II) complexes are 1:2 electrolytes as shown by their molar conductivities (I >(M)) in DMF (dimethyl formamide) at 10(-3) M. The structure of Co(II) complexes is proposed from elemental analysis, Ft-IR, UV-visible spectra, magnetic susceptibility, molar conductivity measurements and mass spectra. Electrochemical and thin-layer spectroelectrochemical studies of the complexes were comparatively studied in the same experimental conditions. The electrochemical results revealed that all complexes displayed irreversible one reduction processes and their cathodic peak potential values (E (pc)) were observed in around of -1.14 to 0.95 V. It was also seen that [CoL1][NO3](2) center dot A 3H(2)O and [CoL2][NO3](2) center dot A 4H(2)O exhibited one cathodic wave without corresponding anodic wave but, [CoL3][NO3](2) center dot A 4H(2)O and [CoL4][NO3](2) center dot A 2H(2)O showed one cathodic wave with corresponding anodic wave, probably due to the presence of different ligand nature even if the complexes have the same N2O2 donor set. In view of spectroelectrochemical studies [CoL3][NO3](2) center dot A 4H(2)O showed distinctive spectral changes in which the intensity of the band (lambda A = at 316 nm, assigned to n -> pi* transitions) decreased and a new broad band in a low intensity about 391 nm appeared as a result of the reduction process based on the cobalt center in the complex.
dc.identifier.doi10.1007/s10847-008-9502-9
dc.identifier.endpage169
dc.identifier.issn1388-3127
dc.identifier.issn1573-1111
dc.identifier.issue1-2
dc.identifier.scopus2-s2.0-58549103896
dc.identifier.scopusqualityQ2
dc.identifier.startpage163
dc.identifier.urihttps://doi.org/10.1007/s10847-008-9502-9
dc.identifier.urihttps://hdl.handle.net/20.500.12604/6059
dc.identifier.volume63
dc.identifier.wosWOS:000262651300020
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofJournal of Inclusion Phenomena and Macrocyclic Chemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241222
dc.subjectMacrocyclic Schiff bases
dc.subjectSalicylaldehyde derivatives
dc.subject1,4-bis(3-Aminopropoxy)butane
dc.subject( +/-)-trans-1,2-Diaminocyclohexane
dc.subjectElectrochemistry
dc.titleSynthesis, characterization and electro-spectroelectrochemical studies of four macrocyclic Schiff-base Co(II) complexes having N2O2 set of donor atoms
dc.typeArticle

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