All the fl uorescent polymers preparedvia atom transfer radical polymerization (ATRP) or reversibleaddition-fragmentation chain transfer (RAFT) are those polymers that have been functionalized with fl uorophore. Priorto our study, it was generally believed that polymerizing nonfl uorescent monomer without incorporating any fluorescent agentonly results in polymer without fl uorescent activity. However, itis surprising to find that conventional ATRP or RAFT polymerization of nonfl uorescent monomers without incorporating anyfluorescent unit can produce fl uorescent polymers.