Correction: Click chemistry approaches to expand the repertoire of PEG-based fluorinated surfactants for droplet microfluidics (RSC Advances (2018) 8 (12960–12974) DOI: 10.1039/C8RA01254G)

The authors regret that during production of the published version of their article the bold formatting in the NMR data to indicate the nuclei of interest was lost. The correctly formatted Synthesis section of the Materials and methods is presented below. The procedure for preparation of the PFPE acid chloride adheres to the previously published method with a few minor alterations18,44 (see ESI). Starting with the commercially available end functional PFPE carboxylic acid Krytox FS(H) 157 (DuPont), the corresponding acid chloride is obtained by treatment with oxalyl chloride in reluxing methoxyper uorobutane (HFE 7100, 3M). The newly generated acid chloride is isolated in situ under reduced pressure and redissolved in FC 3283. The resultant solution/suspension is then filtered under inert atmosphere and used without further purication in the subsequent amidation reaction. [Formula Presented]. The amidation reaction is performed in a biphasic solvent system comprised of FC 3283 and THF in the presence of TEA which serves as an HCl scavenger (see ESI and Holtze et al.18). The desired amine coupling partner dissolved in THF is added dropwise over ca. 30 min to the uorocarbon phase resulting in the formation of a one emulsion. Aer ca. 24 h the crude reaction mixture is isolated via rotary evaporation and once again redissolved in FC 3283 and ltered to obtain a clear, viscous, yellow oil. [Formula Presented].