Reply to the Correspondence on "Can Charge Transfer Across C-H···O Hydrogen Bonds Stabilize Oil Droplets in Water?"

Water-to-oil charge transfer (CT) across weak C-H···O hydrogen bonds is localized for hexane and hexadecane, and is too small to explain oil-droplet stability and electrokinetic experiments. Collective intraphase density rearrangements should not be confused with interfacial CT. Spectroscopic evidence cannot simultaneously imply weak CT for the C-H blue shift and large CT for the O-H/D red shift. A weakness of the C-H···O CT mechanism is that it can't explain other oil emulsion chemistry without this specific chemical motif.