Affordable Access

Publisher Website

Synthesis and characterization of novel thermoresponsive fluorescence complexes based on copolymers with rare earth ions

Authors
Journal
Optical Materials
0925-3467
Publisher
Elsevier
Volume
35
Issue
12
Identifiers
DOI: 10.1016/j.optmat.2013.06.010
Keywords
  • Poly(N-Isopropylacrylamide)
  • Terbium
  • Europium
  • Lower Critical Solution Temperature (Lcst)
  • Atom Transfer Radical Polymerization (Atrp)

Abstract

Abstract The thermo-sensitive and fluorescent complexes containing Eu(III) or Tb(III) were synthesized and characterized, in which cholesterol-g-poly(N-isopropylacrylamide) (PNIPAM) copolymer was used as a polymer ligand. The results from the experiments indicated that Eu(III) or Tb(III) was bonded to nitrogen and oxygen atoms in the polymer chain. The fluorescence lifetimes of the powdered Eu(III) and Tb(III) complexes was 11.48ms and 10.71ms, respectively. The maximum emission intensity of the PNIPAM–Eu(III) complex at 613nm and the PNIPAM–Tb(III) complex at 545nm were enhanced about 11.1 and 11.3 times compared with that of the corresponding rare earth ions, respectively. Additionally, the lower critical solution temperature (LCST) of complexes were slightly higher than those of the copolymers.

There are no comments yet on this publication. Be the first to share your thoughts.