Metal-ion induced FRET in macrocyclic dynamic tweezers

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• 作者：Stephanie Delbaere ; Elena V. Tulyakova ; Emilie Marmois ; Gediminas Jonusauskas ; Elena N. Gulakova ; Yuri V. Fedorov ; Olga A. Fedorova
• 关键词：Bis(styryl) dyes ; Crown ether ; Complex formation ; FRET ; Sandwich complex ; Binding constants determination
• 刊名：Tetrahedron
• 出版年：2013
• 出版时间：23 September, 2013
• 年：2013
• 卷：69
• 期：38
• 页码：8178-8185
• 全文大小：1107 K

文摘

We report here about effective FRET process (73-99 % ) in mono-Mg²⁺ complexes of symmetrical crown ether bis(styryl) dyes. The FRET process has not been observed in the free state and in binuclear complexes. The formation of mononuclear complex provides two styrylic fragments with appropriate positions of absorption and emission bands for FRET. The other important parameter for FRET is the proper geometric orientation of both chromophores, which attain sandwich conformation with close positioning of complexed and free styryl fragments induced by ion-modulated geometry reorganization of the bis-dye.