Premium
Click Chemistry Approach to Rhodamine B‐Capped Polyrotaxanes and their Unique Fluorescence Properties
Author(s) -
Wu Jiayan,
Gao Chao
Publication year - 2009
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200900281
Subject(s) - rhodamine b , fluorophore , fluorescence , chemistry , ethylene glycol , click chemistry , aqueous solution , rhodamine , polymer chemistry , peg ratio , alkyne , hypsochromic shift , photochemistry , organic chemistry , catalysis , physics , finance , photocatalysis , quantum mechanics , economics
A fluorescent polyrotaxane (PR) made from the diazido‐poly(ethylene glycol) (N 3 ‐PEG‐N 3 ) axis, α ‐cyclodextrins, and alkyne‐functionalized rhodamine B (RhB‐alk) stoppers via Cu(I)‐catalyzed azide–alkyne click chemistry is reported. A nanowire‐like morphology of the prepared fluorescent PRs was visualized by atomic force microscopy. The fluorescence emission intensities of RhB‐capped PEG (RhB‐PEG‐RhB) and the PR were much higher than that of neat RhB or RhB‐alk with the same concentration of RhB fluorophore in both dimethylsulfoxide and alkaline aqueous solutions. Fluorescence lifetimes were detected as 3.59, 3.31, 2.99, and 2.99 ns for neat RhB, RhB‐alk, RhB‐PEG‐RhB, and the PR, respectively. The PRs with unique fluorescence properties might have further applications in the fields of biomedicine and bionanotechnology.