Direct Observation of 4f Intrashell Excitation in Luminescent Eu Complexes by Time-Resolved X‑ray Absorption Near Edge Spectroscopy

We report time-resolved X-ray absorption near edge structure (TR-XANES) measurements at the Eu L 3 edge upon photoexcitation of several EuIII-based luminescent lanthanide complexes. We find an unambiguous signature of the 4f intrashell excitation that occurs upon energy transfer from the photoactive...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Chemical Society 2014-03, Vol.136 (11), p.4186-4191
Main Authors: Pacold, Joseph I, Tatum, David S, Seidler, Gerald T, Raymond, Kenneth N, Zhang, Xiaoyi, Stickrath, Andrew B, Mortensen, Devon R
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report time-resolved X-ray absorption near edge structure (TR-XANES) measurements at the Eu L 3 edge upon photoexcitation of several EuIII-based luminescent lanthanide complexes. We find an unambiguous signature of the 4f intrashell excitation that occurs upon energy transfer from the photoactive organic antennas to the lanthanide species. Phenomenologically, this observation provides the basis for direct investigation of a crucial step in the energy transfer pathways that lead to sensitized luminescence in lanthanide-based dyes. Interestingly, the details of the TR-XANES feature suggest that the degree of 4f–5d hybridization may itself vary depending on the excited state of the EuIII ion.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja407924m