Photoluminescence of Visible and NIR‐Emitting Lanthanide‐Doped Bismuth‐Organic Materials
Abstract
A bismuth‐organic compound containing 2,2′:6′2“‐terpyridine (terpy) and 2‐thiophenecarboxylate (TC), of the general formula (terpy)Bi(κ2‐TC)3⋅0.47 H2O (BiOM‐1), has been synthesized under hydrothermal conditions. Addition of a lanthanide nitrate solution to the reaction mixture led to statistical replacement of the bismuth centers, and yielded isomorphous lanthanide containing compounds Bi1−xLnxOM‐1 (Ln=Nd, Sm, Eu, Tb, Dy, Er, and Yb) that showed bismuth and/or ligand sensitized lanthanide‐centered emission, and the first example of NIR emission from a lanthanide doped BiOM. The structure was determined by single‐crystal X‐ray diffraction, and the level and uniformity of lanthanide ion incorporation into the bismuth host was determined by ICP‐OES and electron microprobe analysis. For the visible emitters, lifetime data and quantum yields are presented. A high efficiency of sensitization was calculated for the europium analog (50.1 %), showing significant improvement over previously reported europium thiophenecarboxylates. These novel materials may provide strategies to address concerns over the long‐term sustainability of the rare earth elements, especially relating to optical devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 13, 2018
- Source ID
- 10.1002/chem.201706143
Entities
People
- Alyssa K Adcock
- Benjamin R Sullivan
- Jeffery A. Bertke
- Karah E Knope
- Philip M. Piccoli
- R Lee Ayscue
- Rami Batrice
- Sae Young Han
Organizations
- Georgetown University
- Henry Luce Foundation
- United States Department of Defense
- University of Maryland