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Water‐soluble fluorescent nanoparticles without distinct aggregation of conjugated polymer chains
Author(s) -
Zhang Guangwei,
Lu Xiaomei,
Wang Yunyun,
Huang Yanqin,
Fan Quli,
Huang Wei
Publication year - 2011
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2944
Subject(s) - conjugated system , polymer , nanoparticle , fluorescence , quenching (fluorescence) , materials science , chemical engineering , photochemistry , transmission electron microscopy , tetrahydrofuran , nanotechnology , polymer chemistry , chemistry , organic chemistry , optics , composite material , physics , engineering , solvent
In a previous study, we reported water‐soluble light‐emitting nanoparticles with distinct interchain aggregation states of the constituent conjugated polymers. These interchain states usually result in strong self‐quenching, dramatically reducing the quantum efficiency of fluorescence. In the work reported in the present study, we developed new water‐soluble fluorescent nanoparticles without distinct aggregation of the conjugated polymer chains, which demonstrated distinctive morphologies and optical properties. ‘Strawberry’ morphologies of the nanoparticles were directly observed using transmission electron microscopy. The conjugated polymers were dispersed in the individual cores of the nanoparticles and the majority of the core diameters were in the range 8–12 nm. The primary optical properties of the conjugated polymers in tetrahydrofuran still remained in the nanoparticles. The results suggest that the conjugated polymer chains formed a possible unimolecular structure without distinct aggregation in the nanoparticles. Copyright © 2010 Society of Chemical Industry