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Ligand charge density

  1. Nov 16, 2013 #1
    I want to exchange my Au-citrate nanoparticle with two kinds of ligands :PEG-COOH and PEG-OH.
    Which one is suppose to have more anionic charge density.
  2. jcsd
  3. Nov 17, 2013 #2
    The carboxylic acid is more acidic than the alcohol. I vote COOH more anionic.

    How are you doing the phase transfer? i have done some phase transfer on citrate capped nanoparticles.
  4. Nov 19, 2013 #3
    I agree with Hyo X but don't forget to consider pH and PEG's molecular weight!
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