TY - JOUR

T1 - Arel

T2 - Investigating [Eu(H2O)9]3+Photophysics and Creating a Method to Bypass Luminescence Quantum Yield Determinations

AU - Kofod, Nicolaj

AU - Nawrocki, Patrick

AU - Sørensen, Thomas Just

N1 - Funding Information: The authors thank Carlsbergfondet, Villum Fonden (Grant No. 14922), the University of Copenhagen, the Danish Chemical Society, and Fulbright Denmark for support. Publisher Copyright: © 2022 American Chemical Society. All rights reserved.

PY - 2022

Y1 - 2022

N2 - Lanthanide luminescence has been treated separate from molecular photophysics, although the underlying phenomena are the same. As the optical transitions observed in the trivalent lanthanide ions are forbidden, they do belong to the group that molecular photophysics has yet to conquer, yet the experimental descriptors remain valid. Herein, the luminescence quantum yields (φlum), luminescence lifetimes (τobs), oscillator strengths (f), and the rates of nonradiative (knr) and radiative (krA) deactivation of [Eu(H2O)9]3+were determined. Further, it was shown that instead of a full photophysical characterization, it is possible to relate changes in transition probabilities to the relative parameter Arel, which does not require reference data. While Areldoes not afford comparisons between experiments, it resolves emission intensity changes due to emitter properties from intensity changes due to environmental effects and differences in the number of photons absorbed. When working with fluorescence this may seem trivial; when working with lanthanide luminescence it is not.

AB - Lanthanide luminescence has been treated separate from molecular photophysics, although the underlying phenomena are the same. As the optical transitions observed in the trivalent lanthanide ions are forbidden, they do belong to the group that molecular photophysics has yet to conquer, yet the experimental descriptors remain valid. Herein, the luminescence quantum yields (φlum), luminescence lifetimes (τobs), oscillator strengths (f), and the rates of nonradiative (knr) and radiative (krA) deactivation of [Eu(H2O)9]3+were determined. Further, it was shown that instead of a full photophysical characterization, it is possible to relate changes in transition probabilities to the relative parameter Arel, which does not require reference data. While Areldoes not afford comparisons between experiments, it resolves emission intensity changes due to emitter properties from intensity changes due to environmental effects and differences in the number of photons absorbed. When working with fluorescence this may seem trivial; when working with lanthanide luminescence it is not.

U2 - 10.1021/acs.jpclett.2c00418

DO - 10.1021/acs.jpclett.2c00418

M3 - Journal article

C2 - 35357175

AN - SCOPUS:85127850071

VL - 13

SP - 3096

EP - 3104

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 13

ER -