“…The RAFT agents (Scheme 1) 4-((((2-carboxyethyl)thio)carbonothioyl)thio)-4-cyanopentanoic acid (RAFT1, >95%), 4-cyano-4-((dodecylsulfanylthiocarbonyl)sulfanyl)pentanoic acid (RAFT3, >97%) and 2-(((dodecylthio)carbonothioyl)thio)propanoic acid (RAFT5, >97%) were all purchased from Boron Molecular and used as received. The RAFT agents 4-cyano-4thiothiobutylsulfanylpentanoic acid (RAFT2) 30 and 2-(((butylthio)carbonothioyl)thio)-2methylpropanoic acid 31 were synthesized according to reported protocols. 30,31 The initiators potassium persulfate (KPS, Sigma-Aldrich) and 4,4'-azobis(4-cyanopentanoic acid) (ACPA, Wako) were used as received.…”