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Enhanced fluorescence and structural characteristics of carboxymethyl cellulose/Eu(III) nano-complex: Influence of reaction time.
- Source :
-
Carbohydrate polymers [Carbohydr Polym] 2016 Jan 01; Vol. 135, pp. 57-63. Date of Electronic Publication: 2015 Aug 22. - Publication Year :
- 2016
-
Abstract
- CMC/Eu(III) nano-complexes were synthesized by reacting Eu(3+) with carboxymethyl cellulose (CMC). The SEM and EDS showed that particle size was less than 100nm and evenly distributed. FTIR and XPS indicated that the oxygen atoms in COO (-), OH, and COC were involved in the complexation with Eu(3+), yet, the O atoms were involved in different positions on anhydroglucose rings depending on reaction time. It was found that there were good energy matches between energy levels on ground state of CMC and (5)D0 Eu(III). Moreover, the intensities of (5)D0→(7)F2 of the nano-complexes were stronger than that of (5)D0→(7)F1, which indicated that the Eu(III) was not in the center of symmetry. The optimized reaction time was 35min, at this reaction time the smallest particle size and uniform distribution was obtained, the coordination structure was advantageous for the energy absorption transfer and emission.<br /> (Copyright © 2015 Elsevier Ltd. All rights reserved.)
- Subjects :
- Fluorescence
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Molecular Structure
Nanoparticles ultrastructure
Particle Size
Photoelectron Spectroscopy
Spectroscopy, Fourier Transform Infrared
Time Factors
Carboxymethylcellulose Sodium chemistry
Coordination Complexes chemistry
Europium chemistry
Nanoparticles chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1879-1344
- Volume :
- 135
- Database :
- MEDLINE
- Journal :
- Carbohydrate polymers
- Publication Type :
- Academic Journal
- Accession number :
- 26453851
- Full Text :
- https://doi.org/10.1016/j.carbpol.2015.08.063