Efficient detection of polycyclic aromatic hydrocarbons and polychlorinated biphenyls via three-component energy transfer
Reported herein is the detection of highly toxic polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) via proximity-induced non-covalent energy transfer. This energy transfer occurs in the cavity of γ-cyclodextrin, and is efficient even with the most toxic PAHs and least fluorescent PCBs. The low limits of detection and potential for selective detection using array-based systems, combined with the straightforward experimental setup, make this new detection method particularly promising.
Chemosensing in deep red: A squaraine-based fluorescent chemosensor for pH
We have synthesized and spectrally characterized a squaraine-based fluorescent chemosensor for pH. This chemosensor unlike many others, works in 100% aqueous solutions, signalling the pH change from 10 to 7 by a 14-fold increase in the emission intensity
The development of a reversible chemical sensor based on a CdSe/ZnS nanocrystal (NC) is described. Signal transduction is accomplished by fluorescence resonance energy transfer (FRET) between the NC and a fluorescent pH-sensitive squaraine dye attached to
Snee, Preston T.,Somers, Rebecca C.,Nair, Gautham,Zimmer, John P.,Bawendi, Moungi G.,Nocera, Daniel G.
p. 13320 - 13321
(2007/10/03)
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