News Column

New Heavy Metals Findings from University of Hong Kong Outlined

June 27, 2014

By a News Reporter-Staff News Editor at Energy Weekly News -- Research findings on Heavy Metals are discussed in a new report. According to news reporting originating in Hong Kong, People's Republic of China, by VerticalNews journalists, research stated, "A number of ruthenium(II) and rhenium(I) bipyridine complexes functionalized with lipoic acid moieties have been synthesized and characterized. Functionalization of gold nanoparticles with these chromophoric ruthenium(II) and rhenium(I) complexes has resulted in interesting supramolecular assemblies with Forster resonance energy transfer (FRET) properties that could be modulated via esterase hydrolysis."

The news reporters obtained a quote from the research from the University of Hong Kong, "The luminescence of the metal complex chromophores was turned on upon cleavage of the ester bond linkage by esterase to reduce the efficiency of FRET quenching. The prepared nanoassembly conjugates have been characterized by transmission electron microscopy (TEM), energy-dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), UV-visible spectroscopy, and emission spectroscopy. The quenching mechanism has also been studied by transient absorption and time-resolved emission decay measurements."

According to the news reporters, the research concluded: "The FRET efficiencies were found to vary with the nature of the chromophores and the length of the spacer between the donor (transition metal complexes) and the acceptor (gold nanoparticles)."

For more information on this research see: Forster Resonance Energy Transfer Studies of Luminescent Gold Nanoparticles Functionalized with Ruthenium(II) and Rhenium(I) Complexes: Modulation via Esterase Hydrolysis. ACS Applied Materials & Interfaces, 2014;6(9):6644-6653. ACS Applied Materials & Interfaces can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; ACS Applied Materials & Interfaces -

Our news correspondents report that additional information may be obtained by contacting F.C.M. Leung, University of Hong Kong, Dept. of Chem, Hong Kong, Hong Kong, People's Republic of China. Additional authors for this research include A.Y.Y. Tam, V.K.M. Au, M.J. Li and V.W.W. Yam.

Keywords for this news article include: Asia, Rhenium, Hong Kong, Ruthenium, Heavy Metals, Nanotechnology, Gold Nanoparticles, Transition Elements, Emerging Technologies, People's Republic of China

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Source: Energy Weekly News

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