4 years ago

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

Modulation of the Photophysical Properties of 1-Azathioxanthones by Eu3+, Gd3+, Tb3+, and Yb3+ Ions in Methanol
Lea G. Nielsen, Nicolaj Kofod, Elena Dallerba, Riikka Arppe, Anne Kathrine R. Junker, Thomas Just Sørensen
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?

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ejic.201700720

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.