A multi-receptor fluorescence signaling system exhibiting enhancement selectively in presence of Na(I) and Tl(I) ions

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• 作者：Kalyan K. Sadhu ; Bamaprasad Bag ; Parimal K. Bharadwaj
• 关键词：Fluorescence enhancement ; Metal ion specificity ; Cryptand ; Macrocycle ; Logic functions
• 刊名：Journal of Photochemistry and Photobiology A ; Chemistry
• 出版年：2007
• 期刊代码：66_10106030
• 类别：ch
• 出版时间：25 January 2007
• 卷：185
• 期：2-3
• 页码：231-238
• 文件大小：526 K

摘要

A PET fluorescence signaling system L₁ has been synthesized in the ‘Receptor1-Spacer-Fluorophore-Spacer-Receptor2’ format through attachment of a laterally non-symmetric heteroditopic cryptand and a 4,7,10,13-tetraoxa-1-azacyclopentadecane macrocycle at the 9- and 10-positions of anthracene. The cryptand receptor is derivatized with two 2,4-dinitrobenzene groups to impart structural rigidity. This system exhibits selective fluorescence enhancement in presence of Na(I) and Tl(I) ions simultaneously and mimics the AND logic function. The cryptand receptor also binds a Cu(II) ion outside the cavity and allows L₁ to perform as an INHIBIT chemical logic in presence of H⁺ and Cu(II) ions.