Modulation of the Photophysical Properties of 1‐Azathioxanthones by Eu3+, Gd3+, Tb3+, and Yb3+ Ions in Methanol

The design of bright fluorescent probes based on lanthanide centered emission relies on efficient energy transfer from antenna chromophores to lanthanide centers. Here, we set out to explore the excited state energy migration pathways using collisional quenching of three 1‐azathioxanthones by four l...

Full description

Saved in:
Bibliographic Details
Published in:European journal of inorganic chemistry 2017-12, Vol.2017 (44), p.5246-5253
Main Authors: Arppe, Riikka, Kofod, Nicolaj, Junker, Anne Kathrine R., Nielsen, Lea G., Dallerba, Elena, Just Sørensen, Thomas
Format: Article
Language:English
Subjects:
Chromophores
Dyes
Dyes/Pigments
Energy consumption
Energy transfer
Fluorescence
Gadolinium
Inorganic chemistry
Lanthanides
Luminescence
Migration
Phosphorescence
Quenching
Rate constants
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The design of bright fluorescent probes based on lanthanide centered emission relies on efficient energy transfer from antenna chromophores to lanthanide centers. Here, we set out to explore the excited state energy migration pathways using collisional quenching of three 1‐azathioxanthones by four lanthanide(III) ions. The results show that each combination of lanthanide(III) ion and chromophore must be considered as a unique case, as the rate constants that determine the outcome of the excited state energy migration is modulated differently in each system. For the three dye systems investigated here, the effect of the lanthanide(III) ions is that two dye systems show a strong increase in inter‐system crossing leading to increased fluorescence yields and room temperature phosphorescence, while the fluorescence is quenched in the third dye system. Contrasting our results with literature data leads us to conclude that freely diffusing dyes and ions do not shed light on which properties will be found for linked systems. Strong lanthanide centered luminescence signals require efficient excited state energy transfer from antenna chromophore, but how do we design systems with rapid and efficient energy transfer?
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201700720