30438-96-1Relevant academic research and scientific papers
Intermolecular energy transfer from Tb3+ to Eu3+ in aqueous aggregates and on the surface of human cells
Lee, Minhee,Tremblay, Matthew S.,Jockusch, Steffen,Turro, Nicholas J.,Sames, Dalibor
supporting information; experimental part, p. 2802 - 2805 (2011/07/31)
Efficient intermolecular energy transfer from carbostyril 124-sensitized Tb3+ to Eu3+ in aqueous aggregates is reported. This energy transfer was also recapitulated on the cell surface of a human kidney cell line (HEK-293T) and imaged by fluorescence microscopy as an example for the applicability of this energy transfer probe for imaging in biological systems.
Cocktails of Tb3+ and Eu3+ complexes: A general platform for the design of ratiometric optical probes
Tremblay, Matthew S.,Halim, Marlin,Sames, Dalibor
, p. 7570 - 7577 (2008/02/09)
Fluorescent and luminescent reporters that signal molecular events of interest by modulating the ratio of peaks in their emission profile have advantages over reporters that simply modulate their emission intensity, since ratiometric measurement is concentration-independent and allows them to be effective in complex contexts, such as living cells or sensor microarrays. We herein describe a general platform for the design of ratiometric probes based on a heterometallic Tb3+/Eu3+ bis-lanthanide ensemble, consisting of a mixture, or "cocktail", of otherwise identical heterometalated chelates. The chelate contains an organic photon antenna that sensitizes the Tb3+/Eu3+ luminescence. The contributions of the two metals to the composite luminescence spectrum can be tuned to the same relative scale by adjusting the stoichiometry of the cocktail, allowing subtle changes in their ratio to be accurately measured. Importantly, the ratio responds to chemical and environmental changes experienced by the photon antenna, making the system an ideal platform for the design of chemical and enzymatic probes. As proofs of concept, we describe a ratiometric probe for esterase activity and a polarity-responsive ratiometric sensor.
Palladium-catalyzed allylation of acidic and less nucleophilic anilines using allylic alcohols directly
Hsu, Yi-Chun,Gan, Kim-Hong,Yang, Shyh-Chyun
, p. 1266 - 1269 (2007/10/03)
The direct activation of C-O bonds in allylic alcohols by palladium complexes has been accelerated by carrying out the reactions in the presence of titanium(IV) isoproxide and 4 A molecular sieves. The acidic and less nucleophilic anilines such as diphenylamine, phenothiazine, 4-cyanoaniline, and nitroanilines are efficiently allylated under palladium catalysis using allylic alcohols as allylating reagents.
