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Time‐resolved circularly polarized luminescence of Eu3+‐based systems.

Authors :
Hananel, Uri
Schwartz, Gal
Paiss, Guy
Arrico, Lorenzo
Zinna, Francesco
Di Bari, Lorenzo
Cheshnovsky, Ori
Markovich, Gil
Source :
Chirality; Mar2021, Vol. 33 Issue 3, p124-133, 10p
Publication Year :
2021

Abstract

Chiral Eu3+‐based systems are frequently studied via circularly polarized luminescence spectroscopy. The emission lifetimes of each circular polarization, however, are virtually always ignored, because in a homogeneous sample of emitters, there should be no difference between the two. However, we show that in less robust Eu3+ complex structures, as in the chiral complex Eu (facam)3, a difference in the lifetimes of the two circularly polarized emission components arises due to heterogeneity of the complexes. In this case, each species within the sample could have different degrees of circularly polarized luminescence and decay rates at certain emission lines. The superposition of the emission components of the various chiral species leads to an overall difference in decay rate between the two circular polarizations. Such a difference is also shown for Eu3+‐doped chiral TbPO4·D2O nanocrystals. We believe that this kind of measurement could be a unique tool for determining the homogeneity of a lanthanide‐based chiral system, where other methods might fail in this task. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
08990042
Volume :
33
Issue :
3
Database :
Complementary Index
Journal :
Chirality
Publication Type :
Academic Journal
Accession number :
148632149
Full Text :
https://doi.org/10.1002/chir.23293