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Stepwise Growth of Fullerene Nanoparticles through Guest Exchange of γ‐Cyclodextrin Complexes in Water
Author(s) -
Sugikawa Kouta,
Kozawa Kentaro,
Ueda Masafumi,
Ikeda Atsushi
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201701717
Subject(s) - fullerene , ethylene glycol , cyclodextrin , nanoparticle , peg ratio , chemistry , spectroscopy , materials science , chemical engineering , nanotechnology , nuclear chemistry , organic chemistry , physics , finance , quantum mechanics , engineering , economics
Stepwise growth of fullerene nanoparticles ( n C x ; x= 60 or 70) was performed through guest exchange of a γ‐cyclodextrin (γ‐CD) complex. Fullerenes bicapped by γ‐CD were mixed with presynthesized n C x in the presence of poly(ethylene glycol) (PEG) in water. Fullerenes expelled from the γ‐CD hosts by PEG were piled on the original n C x , resulting in growth of n C x . This process could be repeated and the size of n C x increased according to the number of growth steps. The growth of fullerene nanoparticles was confirmed by UV/Vis absorption spectroscopy, dynamic light scattering measurements, and TEM observations. The stepwise growth method also enabled the preparation of C 60 /C 70 core/shell fullerene nanoparticles, which had the ability to photogenerate active oxygen, 1 O 2 .