Transition-metal-induced fluorescence resonance energy transfer in a cryptand derivatized with two different fluorophores

Sadhu, Kalyan K. ; Bag, Bamaprasad ; Bharadwaj, Parimal K. (2007) Transition-metal-induced fluorescence resonance energy transfer in a cryptand derivatized with two different fluorophores Inorganic Chemistry, 46 (19). pp. 8051-8058. ISSN 0020-1669

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Official URL: http://pubs.acs.org/doi/abs/10.1021/ic700506r

Related URL: http://dx.doi.org/10.1021/ic700506r

Abstract

A laterally nonsymmetric aza cryptand has been derivatized with one 7-nitrobenz-2-oxa-1,3-diazole (fluorophore1) and one/two anthracenes (fluorophore2) to obtain 1 and 2. Their emission characteristics are probed in the presence of a number of transition metals and proton. In the case of 1, Cu(II), Zn(II), Cd(II), and proton afford a large enhancement of fluorescence, whereas Fe(II) and Ag(I) exhibit one order of magnitude less enhancement. In contrast, 2 gives a large enhancement with Cu(II), Ag(I), and proton. The enhancement is observed in the diazole moiety even when the anthracene fluorophore is excited because of substantial fluorescence resonance energy transfer from anthracene to the diazole moiety. Compounds 1 and 2 can be termed as the second-generation fluorescence signaling systems.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:4669
Deposited On:18 Oct 2010 07:10
Last Modified:18 May 2011 07:56

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