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pubmed-article:18024189pubmed:dateCreated2008-6-9lld:pubmed
pubmed-article:18024189pubmed:abstractTextA new fluorescent chemosensor for sensing Co(II) using di(2-picolyl)amino (DPA) as a recognition group and quinazoline as a reporting group has been synthesized and characterized. The quinazoline derivative contains an intramolecular hydrogen bond, which would undergo excited-state intramolecular proton transfer (ESIPT) at illumination. The fluorescence quenching is attributed to cation-induced inhibition of ESIPT, which constitutes the basis for the determination of Co(II) with the prepared chemosensor. The fluorophore forms 1:1 cobalt(II) complex with the logarithm of apparent dissociation constant log K(a)=6.8. The analytical performance characteristics of the proposed Co(II)-sensitive sensor were investigated. The chemosensor exhibits a linear response toward Co(II) in the concentration range 3.2 x 10(-8) to 1.4 x 10(-6) M, with a working pH range from 7.0 to 9.5 and high selectivity.lld:pubmed
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pubmed-article:18024189pubmed:issn1386-1425lld:pubmed
pubmed-article:18024189pubmed:authorpubmed-author:Guo-LiShenSlld:pubmed
pubmed-article:18024189pubmed:authorpubmed-author:Ru-QinYuYlld:pubmed
pubmed-article:18024189pubmed:authorpubmed-author:ZhangXiao-Bin...lld:pubmed
pubmed-article:18024189pubmed:authorpubmed-author:LuoHong-YuanH...lld:pubmed
pubmed-article:18024189pubmed:authorpubmed-author:HeChun-LianCLlld:pubmed
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pubmed-article:18024189pubmed:volume70lld:pubmed
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pubmed-article:18024189pubmed:pagination337-42lld:pubmed
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pubmed-article:18024189pubmed:year2008lld:pubmed
pubmed-article:18024189pubmed:articleTitleSynthesis of dipicolylamino substituted quinazoline as chemosensor for cobalt(II) recognition based on excited-state intramolecular proton transfer.lld:pubmed
pubmed-article:18024189pubmed:affiliationState Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, PR China.lld:pubmed
pubmed-article:18024189pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:18024189pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed