Estimating the Donor-Acceptor Distance To Tune the Emission Efficiency of Luminescent Lanthanide Compounds

Jorge H S K Monteiro; Ana de Bettencourt-Dias; Fernando A Sigoli

doi:10.1021/acs.inorgchem.6b02637

Estimating the Donor-Acceptor Distance To Tune the Emission Efficiency of Luminescent Lanthanide Compounds

Inorg Chem. 2017 Jan 17;56(2):709-712. doi: 10.1021/acs.inorgchem.6b02637. Epub 2016 Dec 22.

Authors

Jorge H S K Monteiro^{1

2}, Ana de Bettencourt-Dias², Fernando A Sigoli¹

Affiliations

¹ Institute of Chemistry, University of Campinas , Campinas, São Paulo, Brazil.
² Department of Chemistry, University of Nevada , Reno, Nevada 89557, United States.

PMID: 28004920
DOI: 10.1021/acs.inorgchem.6b02637

Abstract

The influence of the donor-acceptor distance R_L on the photophysical properties, including the emission quantum yield, of two europium complexes with the same coordination number, and thus similar microsymmetries, was investigated by spectroscopic and computational methods. K₃[Eu(dipicCbz)₃] was synthesized using the new ligand dipicCbz and its photophysical properties compared to Cs₃[Eu(dipic)₃]. We found that a 50% increase in R_L from 4.1 to 6.5 Å results in a substantial decrease in the emission efficiency from 24 to 1.8%.