Study on interaction between Eu(III) and thermosensitive microsphere

Based on the synthesis of poly( N -isopropylacrylamide)-grafted poly( N -isopropylacrylamide-co-styrene) (PNNS) microsphere, Eu(III) was chosen to coordinate with PNNS. The interaction between Eu(III) and PNNS was characterized by using X-ray photoelectron spectroscopy, Fourier transform infrared, u...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2009-03, Vol.62 (3), p.337-344
Main Authors: Guo, Xiaoyun, Yin, Weiqing, Sun, Xuehua, Huang, Xiaohua, Lu, Tianhong
Format: Article
Language:English
Subjects:
Applied sciences
Carbonyl groups
Carbonyls
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Electrons
Emulsion polymerization
Europium
Exact sciences and technology
Fluorescence
Fourier transforms
Infrared spectroscopy
Organic Chemistry
Organic polymers
Original Paper
Photoelectrons
Physical Chemistry
Physicochemistry of polymers
Polyisopropyl acrylamide
Polymer Sciences
Polymers with particular properties
Potassium
Preparation, kinetics, thermodynamics, mechanism and catalysts
Soft and Granular Matter
X ray photoelectron spectroscopy
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Summary:Based on the synthesis of poly( N -isopropylacrylamide)-grafted poly( N -isopropylacrylamide-co-styrene) (PNNS) microsphere, Eu(III) was chosen to coordinate with PNNS. The interaction between Eu(III) and PNNS was characterized by using X-ray photoelectron spectroscopy, Fourier transform infrared, ultraviolet–visual and fluorescence spectroscopy. The results from experiments indicated that the Eu(III) is mainly bonded to O of the carbonyl groups of PNNS and formed the complex of PNNS–Eu(III). After forming the PNNS–Eu(III) complex, the emission fluorescence intensity of Eu(III) in the complex is significantly enhanced because the effective intramolecular energy-transfer from PNNS to Eu(III). Especially, the maximum emission intensity of the PNNS–Eu(III) complex at 614 nm is enhanced about 33 times comparing to that of the pure Eu(III). The intramolecular energy-transfer efficiency from PNNS to Eu(III) reaches 55%.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-008-0017-8