Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 156, Issue 1, Pages 100-107Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.03.078
Keywords
Molecularly imprinted polymer; Photoresponsive materials; Molecular recognition; Fluorine-substituted azobenzene; Photoisomerization; Fluorine-fluorine interaction
Funding
- National Natural Science Foundation of China [20872121]
- Natural Science Foundation [2009BB4001]
- Fundamental Research Funds for the Central Universities [XDJK2009C011, XDJK2009C178]
- Higher Education of China [20090182120010]
- Southwest University
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The primary objective of this work is to explore the photoresponsive molecular recognition directed by fluorine-fluorine interaction. A new kind of fluorine-substituted photoresponsive functional monomer, (4-methacryloyloxy) nonafluoroazobenzene (MANFAB), was designed and synthesized, and a photoresponsive molecularly imprinted polymer containing a fluorine-substituted azobenzene chromophore (MIPF) was then fabricated using MANFAB as the monomer and 2,3,4,5,7,8,9,10-octafluorophenazine (PAF) as the model template. The photoisomerization process of MIPF materials is reversible. The release and uptake of PAF from toluene is photoregulated by alternate irradiation at 315 nm and 440 nm, indicating that photoresponsive molecular recognition directed by fluorine-fluorine interaction is possible. The binding strength of the imprinted receptor sites in MIPF for PAF is 4.67 x 10(4) M(-1). The density of receptor sites in the MIPF material is 1.26 mu mol/g-MIPF. (C) 2011 Elsevier B.V. All rights reserved.
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