Energy transfer processes and structure of carboxymethyl cellulose-Tb/Eu nanocomplexes with color-tunable photoluminescence.
Carbohydr Polym
; 271: 118386, 2021 Nov 01.
Article
en En
| MEDLINE
| ID: mdl-34364585
ABSTRACT
A series of fluorescent nanocomplexes of carboxymethyl cellulose (CMC)/Terbium (Tb)- Europium (Eu) were successfully synthesized without introducing a second ligand. By adjusting the concentration of the coordinated ions, these nanocomplexes exhibit favorably visibly tunable luminescence properties with colors being able to change from green to red. The XPS analysis demonstrates the formation Tb(III)-O2- and Eu(III)-O2- between OH and COO- in CMC and Tb3+ or Eu3+ ions, which is advantage for light absorption by UV-Vis spectroscopy and fluorescence spectroscopy. The ligand CMC plays a role in coordinating with terbium and europium ions, but also serves as an energy donor to these metal ions by antenna effect. Moreover, the energy transfer also occurred from terbium ions to europium ions in CMC matrix, which is responsible for the tunable luminescence properties of these complexes.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Sustancias Luminiscentes
/
Nanoestructuras
/
Complejos de Coordinación
Idioma:
En
Revista:
Carbohydr Polym
Año:
2021
Tipo del documento:
Article
País de afiliación:
China