期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 213, 期 15, 页码 1612-1617出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201200233
关键词
cellulose nanocrystals; fluorescence; metal ions; pyrene; sensor
资金
- National Natural Science Foundation of China [50973085]
- National Basic Research Program of China (973 Program) [2010CB732203]
- Program for New Century Excellent Talents in University [NCET-11-0415]
Cellulose nanocrystals are converted into fluorescent labeling nanoparticles (Py-CNC) by a three-step procedure. The fluorescence emission of pyrene is enhanced after the modification to cellulose nanocrystals. Py-CNC is evaluated for its sensing ability towards metal ions and exhibits high selectivity towards Fe3+ among other screened metal ions with good discrimination between Fe2+ and Fe3+. The excellent selectivity for Fe3+ over a wide linear concentration range is observed through changes in the emission spectra. Spectroscopic analyses prove that the coordination interaction between Fe3+ and pyrene-modified cellulose nanocrystals leads to the recognition process. This sensing nanomaterial can be employed as a chemosensor for Fe3+ and promoted for many applications in chemical, environmental, and biological systems.
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