Chemistry and Physics Faculty Articles
Title
Rethinking Sensitized Luminescence in Lanthanide Coordination Polymers and MOFs: Band Sensitization and Water Enhanced Eu Luminescence in [Ln(C15H9O5)3(H2O)3]n (Ln = Eu, Tb)
Document Type
Article
Publication Date
7-29-2016
Publication Title
Inorganic Chemistry
ISSN
0020-1669
Volume
55
Issue/No.
16
First Page
7920
Last Page
7927
Abstract
A coordination polymer [Ln(C15H9O9)3(H2O)3]n (1-Ln = Eu(III), Tb(III)) assembled from benzophenonedicarboxylate was synthesized and characterized. The organic component is shown to sensitize lanthanide-based emission in both compounds, with quantum yields of 36% (Eu) and 6% (Tb). Luminescence of lanthanide coordination polymers is currently described from a molecular approach. This methodology fails to explain the luminescence of this system. It was found that the band structure of the organic component rather than the molecular triplet state was able to explain the observed luminescence. Deuterated (Ln(C15H9O9)3(D2O)3) and dehydrated (Ln(C15H9O9)3) analogues were also studied. When bound H2O was replaced by D2O, lifetime and emission increased as expected. Upon dehydration, lifetimes increased again, but emission of 1-Eu unexpectedly decreased. This reduction is reasoned through an unprecedented enhancement effect of the compound’s luminescence by the OH/OD oscillators in the organic-to-Eu(III) energy transfer process.
Additional Comments
NSF grant #: 0922931
NSUWorks Citation
Einkauf, J. D., Kelley, T. T., Chan, B. C., & de Lill, D. T. (2016). Rethinking Sensitized Luminescence in Lanthanide Coordination Polymers and MOFs: Band Sensitization and Water Enhanced Eu Luminescence in [Ln(C15H9O5)3(H2O)3]n (Ln = Eu, Tb). Inorganic Chemistry, 55, (16), 7920 - 7927. https://doi.org/10.1021/acs.inorgchem.6b00878. Retrieved from https://nsuworks.nova.edu/cnso_chemphys_facarticles/245
ORCID ID
0000-0003-0891-7246
DOI
10.1021/acs.inorgchem.6b00878
Comments
©2016 American Chemical Society