Chemistry and Physics Faculty Articles

Title

Enhancing Luminescence in Lanthanide Coordination Polymers Through Dilution of Emissive Centers

Document Type

Article

Publication Date

5-2018

Publication Title

Journal of Luminescence

Keywords

Lanthanide, Antenna effect, Coordination polymer, Doping

ISSN

0022-2313

Volume

197

First Page

412

Last Page

417

Abstract

A Ln-adipate metal-organic framework templated with 4,4′-bipyridine (GWMOF-6) was synthesized with Eu(III) or Tb(III) ions with various concentrations of optically inert Gd(III) ion in order to evaluate the effects of diluting the emissive metal center on the efficiency of luminescence. The doping ratios of Ln:Gd (Ln = Eu or Tb) showed that of the ratios studied, the 50:50 system had among the highest quantum yields (Eu = 3.9%, Tb = 7.6%) with increasing lifetimes as Gd(III) concentration increased. A 50:50 Eu:Tb system was also synthesized and showed to be more efficient than the Eu:Gd systems (Φ = 15.3%), with an exceptionally high energy transfer efficiency (80%) from the 5D4 state of the Tb(III) ion to the 5D1 and 5D0 energy levels of the Eu(III) ion.

Comments

©2018 Elsevier B.V. All rights reserved.

ORCID ID

0000-0003-0891-7246

DOI

10.1016/j.jlumin.2018.01.045

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