| Abstract
| - A novel series of well-defined amphiphilic block copolymers containing conjugated poly(fluorene) (PF) block and coillike poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) were successfully synthesized through atom transfer radical polymerization (ATRP) initialized by a 2-bromoisobutyrateend-capped PF macroinitiator using CuCl/HMTETA (1,1,4,7,10,10-hexamethyltriethylenetetramine) asthe catalyst. The first-order kinetics plot indicated a constant number of active species present in thepolymerization. The molecular weight and molecular weight distribution were well controlled, implyingwell-defined block structure of the prepared block copolymers. The chemical structures of the copolymerswere confirmed by 1H NMR studies. The copolymers could be successfully quanternized, and the finalconjugated−ionic block copolymers were found to form PF aggregates in water as confirmed by 1H NMR,UV−vis, and photoluminescence (PL) spectra. PL spectra and quantum efficiency measurement alsosuggested the formation of excimers within the PF aggregates.
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