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      Simultaneous photoinduced electron transfer and photoinduced CuAAC processes for antibacterial thermosets

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      Embargo Lift Date: 2019-04-01
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      Author
      Oz, E.
      Uyar, T.
      Esen, H.
      Tasdelen, M. A.
      Date
      2017
      Source Title
      Progress in Organic Coatings
      Print ISSN
      0300-9440
      Publisher
      Elsevier
      Volume
      105
      Pages
      252 - 257
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      A combination of simultaneous photoinduced electron transfer and photoinduced CuAAC processes enables the in-situ preparation of antibacterial thermosets containing silver nanoparticles (AgNPs) in one-pot. Upon photolysis of photoinitator, the generated radicals not only reduce Cu(II) into Cu(I) activator to catalyst the CuAAC click reaction, but also simultaneously generate AgNPs from AgNO3 through electron transfer reaction. Due to their reduction potentials difference, the polymer matrix is formed before the formation of AgNPs, assisting to eliminate the agglomeration of them. The thermoset structures are confirmed by FT-IR and solubility tests, whereas the presence of AgNPs is proven by transmission electron microscopy with energy dispersive X-ray system analyzer. The samples containing 5 and 10% AgNPs exhibited strong inhibition zones, where all kinds of bacteria (gram-positive (Staphylococcus Aureus) and gram-negative (Escherichia Coli)) were killed in the surrounding of the film samples.
      Keywords
      Copper-catalyzed azide-alkyne cycloaddition click chemistry
      Bacteria
      Electron transitions
      Electrons
      Escherichia coli
      Free radical reactions
      High resolution transmission electron microscopy
      Metal nanoparticles
      Nanocomposites
      Nanoparticles
      Photolysis
      Photopolymerization
      Thermosets
      Transmission electron microscopy
      Antibacterial properties
      Azide-alkyne cycloaddition
      Electron-transfer reactions
      Energy dispersive x-ray
      Photo-induced electron transfer
      Silver nanoparticles
      Silver nanoparticles (AgNps)
      Staphylococcus aureus
      Silver
      Permalink
      http://hdl.handle.net/11693/37340
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.porgcoat.2017.01.011
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