Synthesis and spectroscopic studies of some new polyether ligands of the Schiff base type

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dc.contributor.authorYildiz, M
dc.date.accessioned2025-01-27T20:29:17Z
dc.date.available2025-01-27T20:29:17Z
dc.date.issued2004
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractNew polyether ligands of Schiff base type (3-13) were synthesized from the reaction of diethylene glycol bis(2-aminophenyl)ether and triethylene glycol bis(2-aminophenyl)ether with salicylaldehyde, 5-methoxysalicylaldehyde, 5-bromosalicylaldehyde, 5-nitro salicylaldehyde, and 2-hydroxy-1-naphthaldehyde. The products were characterized by elemental analysis, IR, H-1, C-13 NMR, and UV-VIS techniques. The UV-VIS spectra of those Schiff bases with an OH group in the ortho position to the imino group were studied in polar and nonpolar solvents in acidic and basic media. The compounds are in tautomeric equilibrium (enol-imine, O-(HN)-N-... reversible arrow keto-amine, (OH)-H-...-N forms) in solvents, acidic chloroform, and benzene solutions and basic DMSO, chloroform, and benzene solutions. These tautomers were not observed in polar and non-polar solvents and in basic solutions of DMSO, chloroform, and benzene for the Schiff bases 5-10. Tautomer proportions, which were obtained from H-1 NMR and UV-VIS data in DMSO, were compared for compounds 3, 4, 11, and 12.
dc.identifier.doi10.1081/SL-120039588
dc.identifier.endpage381
dc.identifier.issn0038-7010
dc.identifier.issn1532-2289
dc.identifier.issue4
dc.identifier.scopus2-s2.0-4444355007
dc.identifier.scopusqualityQ3
dc.identifier.startpage367
dc.identifier.urihttps://doi.org/10.1081/SL-120039588
dc.identifier.urihttps://hdl.handle.net/20.500.12428/22892
dc.identifier.volume37
dc.identifier.wosWOS:000223816800004
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor & Francis Inc
dc.relation.ispartofSpectroscopy Letters
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectSchiff base
dc.subjecttautomerism
dc.subjectsolvent effect
dc.subjectpolyether
dc.subjectbasic solutions
dc.titleSynthesis and spectroscopic studies of some new polyether ligands of the Schiff base type
dc.typeArticle

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