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Manjare Sudesh Tulshiram
분자활성 촉매반응 연구단
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Solvent-controlled novel Cu+ and Cu+/2+ fluorescent turn-ON probing

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Title
Solvent-controlled novel Cu+ and Cu+/2+ fluorescent turn-ON probing
Author(s)
Ha Y.; Murale D.P.; Sudesh T. Manjare; Kim M.; Jeong J.A.; David G. Churchill
Publication Date
2016-01
Journal
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.37, no.1, pp.69 - 76
Publisher
KOREAN CHEMICAL SOC
Abstract
Anovel Schiff base probe, carbamoyl salicylimine benzothiazole hydrazine, was prepared and measured for its probing ability. High sensitivity was shown for Cu+and Cu2+. When solvent polarity was regulated through a combination of H2O and acetonitrile, selective sensing ofCu+or the total amount of Cu+andCu2+ was possible. In addition, a linear hypsochromic fluorescent shift of about 30 nm was shown. A binding stoichiometry of 1:1 exists at low concentration. Time-dependent emission measurement showed an exponential decay curve (τ1 = 2.99 × 103s, 10 equiv of Cu+) and a linear decay line (slope = -0.0216, 5 equiv of Cu+). Interference experiments in 50% acetonitrile inH2Oshowed that the emission produced by Cu+and Cu2+ was not disturbed by other metal ions or by acidity or basicity. Peroxynitrite changed the emission trends; Cu+emission decreased (78%) and Cu2+ fluorescence increased (28-fold). Biothiols, L-cysteine, DL-homocysteine, reduced glutathione, and N-acetyl-L-cysteine affected the complete reversibility of Cu+-induced emission in 50% (v/v) acetonitrile in H2O, relative to partial reversibility of Cu2+ emission. Thus, by regulating the ratio between acetonitrile and H2O, Cu+and Cu+/2+ can be probed selectively. © 2015 Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/2689
ISSN
0253-2964
Appears in Collections:
Center for Catalytic Hydrocarbon Functionalizations(분자활성 촉매반응 연구단) > Journal Papers (저널논문)
Files in This Item:
2016-07-15-분자활성 - Ha_et_al-2016-Bulletin_of_the_Korean_Chemical_Society.pdfDownload

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