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Researchers from University of Notre Dame Describe Findings in Oligopeptides (Size-Dependent Excited State Behavior of Glutathione-Capped Gold...

September 9, 2014



Researchers from University of Notre Dame Describe Findings in Oligopeptides (Size-Dependent Excited State Behavior of Glutathione-Capped Gold Clusters and Their Light-Harvesting Capacity)

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Peptides have been published. According to news reporting from Notre Dame, Indiana, by NewsRx journalists, research stated, "Glutathione-protected gold clusters exhibit size-dependent excited state and electron transfer properties. Larger-size clusters (e.g., Au(25)GSH(18)) with core-metal atoms display rapid (

The news correspondents obtained a quote from the research from the University of Notre Dame, "These decay components have been identified as metal metal transition and ligand-to-metal charge transfer, respectively. The short lifetime relaxation component becomes less dominant as the size of the gold cluster decreases. The long-lived excited state and ability to participate in electron transfer are integral for these clusters to serve as light-harvesting antennae. A strong correlation between the ligand-to-metal charge-transfer excited state lifetime and photocatalytic activity was evidenced from the electron transfer to methyl viologen. The photoactivity of these metal clusters shows increasing photocatalytic reduction yield (0.05-0.14) with decreasing cluster size, Au-25 < Au-18 < Au-15 < Au10-12."

According to the news reporters, the research concluded: "Gold clusters, Au(18)GSH(14), were found to have the highest potential as a photosensitizer on the basis of the quantum yield of electron transfer and good visible light absorption properties."

For more information on this research see: Size-Dependent Excited State Behavior of Glutathione-Capped Gold Clusters and Their Light-Harvesting Capacity. Journal of the American Chemical Society, 2014;136(31):11093-11099. Journal of the American Chemical Society can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of the American Chemical Society - www.pubs.acs.org/journal/jacsat)

Our news journalists report that additional information may be obtained by contacting K.G. Stamplecoskie, University of Notre Dame, Dept. of Chem & Biochem, Notre Dame Radiat Lab, Notre Dame, IN 46556, United States (see also Peptides).

Keywords for this news article include: Notre Dame, Indiana, United States, North and Central America, Emerging Technologies, Glutathione, Nanotechnology, Oligopeptides, Photocatalyst, Photocatalytic

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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