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All‐Conjugated Triblock Polyelectrolytes
Author(s) -
Ying Lei,
Zalar Peter,
Collins Samuel D.,
Chen Zhao,
Mikhailovsky Alexander A.,
Nguyen ThucQuyen,
Bazan Guillermo C.
Publication year - 2012
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201202817
Subject(s) - polyelectrolyte , copolymer , materials science , polymer , amphiphile , conjugated system , polymerization , substrate (aquarium) , polarity (international relations) , polymer science , chemical engineering , polymer chemistry , nanotechnology , chemistry , biochemistry , oceanography , engineering , composite material , cell , geology
All‐conjugated triblock polyfluorenes with well‐defined molecular weights and low polydispersities are synthesized via chain‐growth Suzuki‐Miyaura polymerization. Ionization of pendant alkylbromide chains by pyridine affords amphiphilic triblock polyelectrolytes with neutral/charged/neutral or charged/neutral/charged segments. The immiscible blocks lead to aggregation in polar and nonpolar solvents, and to complex surface morphologies depending on the polarity of the substrate. These triblock polyelectrolytes can also be used as interfacial layers in polymer light‐emitting diodes to facilitate electron injection from aluminum.