What could explain the loose of luminescence property of a mixed Copper(II)-Europium(III) complexes?
Thank you
Dear Patrick Djonwouo ,
According to the following paper:
Jiménez, J. A. (2015). Photoluminescence of Eu3+-doped glasses with Cu2+ impurities. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 145, 482-486.
https://www.sciencedirect.com/science/article/abs/pii/S1386142515003431
It has something to do with the quenching of Cu2+ because of an overlap mechanism between a Cu2+ absorption band and an Eu3+ emission band (e.g. 5D0→7F2) of the Eu3+ emission spectra.
This is more recently investigated further and basically confirmed:
Jiménez, J. A. (2017). Eu3+ amidst ionic copper in glass: Enhancement through energy transfer from Cu+, or quenching by Cu2+?. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 173, 979-985.
https://www.sciencedirect.com/science/article/abs/pii/S138614251630659X
Hope this helps you a bit further.
Best regards.
Respected Professor Rob Keller,
Thank you very much for your answer and the link to the publication.
I will read to understand better. I am sure It would be helpful.
Best regards
Patrick
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