Studies on UV-vis and fluorescence changements in Co 2+ and Cu 2+ recognition by a new benzimidazole-benzothiadiazole derivative

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dc.contributor.authorÇimen O.
dc.contributor.authorDinҫalp H.
dc.contributor.authorVarlikli C.
dc.date.accessioned2024-07-22T08:13:55Z
dc.date.available2024-07-22T08:13:55Z
dc.date.issued2015
dc.description.abstractA novel fluorescent sensor (BI-T) was synthesized by the coupling reaction of 2-(2-hydroxyphenyl)-7-phenyl-1H-benzimidazole-4-boronic acid with 4,7-dibromo-2,1,3-benzothiadiazole via Pd-catalysed Suzuki reaction. Its photophysical properties were investigated systematically in different solvents to analyze its potential usage in the fluorescence detection for transition metal ions such as Co 2+ and Cu 2+ in solutions. In benzonitrile solution, new absorption bands for complex structure of BI-T at 470 nm and 580 nm were appeared in the presence of Co 2+ ions with respect to the uncomplexed form of the sensor absorption. BI-T sensor is usable for both Co 2+ and Cu 2+ sensation through "on-off" fluorescence change in benzonitrile. In ethanol solution, BI-T shows similar optical performances to detect Co 2+ and Cu 2+ ions. BI-T detects trace amount of transition metals in ethanol with estimated limit of detection around 4.1 × 10 -7 M and 5.5 × 10 -7 M for Co 2+ and Cu 2+ ions, respectively. Possible formation of metal-to-ligand charge transfer (MLCT) state during the titration with Co 2+ ion is supported by the detection of long-lived species in the excited state. © 2014 Elsevier B.V. All rights reserved.
dc.identifier.DOI-ID10.1016/j.snb.2014.12.056
dc.identifier.issn09254005
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/16449
dc.language.isoEnglish
dc.publisherElsevier B.V.
dc.subjectAromatic compounds
dc.subjectCharge transfer
dc.subjectChemical reactions
dc.subjectEthanol
dc.subjectExcited states
dc.subjectFluorescence
dc.subjectMetal ions
dc.subjectQuenching
dc.subjectTrace elements
dc.subjectTransition metals
dc.subject1 ,3-benzothiadiazole
dc.subjectBenzimidazoles
dc.subjectBenzothiadiazole derivatives
dc.subjectBenzothiadiazoles
dc.subjectFluorescence detection
dc.subjectFluorescent sensors
dc.subjectMetal-to-ligand charge transfer state
dc.subjectPhotophysical properties
dc.subjectTransition metal compounds
dc.titleStudies on UV-vis and fluorescence changements in Co 2+ and Cu 2+ recognition by a new benzimidazole-benzothiadiazole derivative
dc.typeArticle

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