DC Field | Value | Language |
---|---|---|
dc.contributor.author | Khatua, Snehadrinarayan | ko |
dc.contributor.author | Kang, Jina | ko |
dc.contributor.author | Churchill, David G | ko |
dc.date.accessioned | 2013-03-11T03:40:53Z | - |
dc.date.available | 2013-03-11T03:40:53Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2010-03 | - |
dc.identifier.citation | NEW JOURNAL OF CHEMISTRY, v.34, no.6, pp.1163 - 1169 | - |
dc.identifier.issn | 1144-0546 | - |
dc.identifier.uri | http://hdl.handle.net/10203/98168 | - |
dc.description.abstract | Two chiral and one racemic fluorescent dimeric zinc complex {[Zn-2(slysH)(2)Cl-2]center dot(CH3OH)(2)center dot(H2O)(3) (1), [Zn-2(slysH)(2) (NO3)(2)]center dot(H2O)(3) (2), [Zn-2(rslysH)(2)(mu-OAc)(2)] (3)} are compared herein. Presently, 3 has been synthesized by a one-pot reaction in which the D-/L-lysine-based Schiff base ligand [slys = 6-amino-2-{(2-hydroxybenzylidene)amino}hexanoate] is generated in situ. These compounds have been characterized by single-crystal X-ray diffraction and by various spectroscopic techniques. The structures of previously reported compounds 1 and 2 are closely related in which two zinc centers possess two phenolate-bridges and an axial chloride or nitrate ligand. The novel compound 3 differs structurally through the presence and coordination mode of two bridging acetate groups spanning the dizinc core and formally releasing the phenolate bridging Schiff base ligands. These compounds (1-3) are highly blue fluorescent, either as solids or dissolved species. Under neutral and aqueous conditions (pH 7.4; 0.01 M HEPES buffer, H2O-MeOH = 9:1), the quantum yields are Phi(F) = 0.17 (1), 0.21 (2) (lambda(ex) = 352 nm, lambda(em) = 452 nm), Phi(F) = 0.16 (3) (lambda(ex) = 354 nm, lambda(em) = 452 nm). Complex 3 metal ion detection capability (i.e., Na+, K+, Ca2+, Mg2+, Co2+, Ni2+, Mn2+, Cu2+, Pb2+, Ag+, Hg2+, and Cd2+) was gauged in aqueous media at physiological pH facilitated by the similarity of its starting photophysical properties with those of 1 and 2. These dizinc species were all found to act as a highly selective fluorescent ON-OFF probes for Cu2+ through the direct displacement of two zinc ions in aqueous media at physiological pH range. The phenolate-bridged compounds 1 and 2, however, showed better selectivity towards Cu2+ over competitive ions, Ni2+ and Co2+ than the acetate-bridged compound 3. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | FLUORESCENT CHEMOSENSORS | - |
dc.subject | LIVING CELLS | - |
dc.subject | COPPER IONS | - |
dc.subject | TURN-ON | - |
dc.subject | SENSOR | - |
dc.subject | COMPLEXES | - |
dc.subject | CU(II) | - |
dc.subject | WATER | - |
dc.subject | LUMINESCENCE | - |
dc.subject | RECOGNITION | - |
dc.title | Direct dizinc displacement approach for efficient detection of Cu(2+) in aqueous media: acetate versus phenolate bridging platforms | - |
dc.type | Article | - |
dc.identifier.wosid | 000278275700022 | - |
dc.identifier.scopusid | 2-s2.0-77953148299 | - |
dc.type.rims | ART | - |
dc.citation.volume | 34 | - |
dc.citation.issue | 6 | - |
dc.citation.beginningpage | 1163 | - |
dc.citation.endingpage | 1169 | - |
dc.citation.publicationname | NEW JOURNAL OF CHEMISTRY | - |
dc.identifier.doi | 10.1039/b9nj00770a | - |
dc.contributor.localauthor | Churchill, David G | - |
dc.contributor.nonIdAuthor | Khatua, Snehadrinarayan | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | FLUORESCENT CHEMOSENSORS | - |
dc.subject.keywordPlus | LIVING CELLS | - |
dc.subject.keywordPlus | COPPER IONS | - |
dc.subject.keywordPlus | TURN-ON | - |
dc.subject.keywordPlus | SENSOR | - |
dc.subject.keywordPlus | COMPLEXES | - |
dc.subject.keywordPlus | CU(II) | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordPlus | LUMINESCENCE | - |
dc.subject.keywordPlus | RECOGNITION | - |
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