Partitioning Coefficients. To gain insight as to the influence of hydrophobicity on the surface activity of the dimers, we determined the partitioning coefficients for our suite of compounds between octanol and pure water (KOW), and between octanol and 1.0 M ammonium sulfate solution (KOAS). To determine KOAS, each compound was prepared in triplicate at 3 mM in a 1:1 1.0 M ammonium sulfate:1-octanol solution and sonicated in conical vials for ~24 hours to allow equilibration. Subsequently, 0.1 mL aliquots were taken from the 1-octanol phase of each vial and diluted to 0.5 mL with HPLC grade MeOH. Samples were then analyzed quantitatively using negative mode ESI-LCMS using an Agilent reverse-phase C18 column to determine the molar fraction of substrate present within the octanol phase. Octanaol-ammonium sulfate partitioning coefficients were then calculated according to 𝑙𝑜𝑔(𝐾 !"# ) = 𝑙𝑜𝑔 (