Underestimated Color Centers: Defects as Useful Reducing Agents in Lanthanide-Activated Luminescent Materials

Angewandte Chemie
Markus SutaClaudia Wickleder

Abstract

Inorganic hosts, such as SrB4 O7 or certain nitrides, intrinsically stabilize Eu2+ even when the dopant is an Eu3+ -based precursor and reducing conditions are not employed in the synthesis. Although this concept is well known in the synthesis of phosphorescent materials, the mechanistic details are scarcely understood. Herein, we demonstrate that trapped charge carriers, such as color centers, can also act as redox partners to stabilize certain oxidation states of activators. Eu-activated CsMgCl3 and CsMgBr3 are used as examples. Upon doping with EuCl3 and in the absence of reducing conditions during the synthesis, dominant cyan or green luminescence from Eu2+ ions was observed. Photoluminescence spectroscopy at 10 K revealed that the reduction is correlated to color centers localized at defects. Although defects are typically undesired in phosphors, we have shown that their role may be underestimated and they could be used on purpose in the preparation of selected inorganic phosphors.

References

Jan 29, 1999·Science·R T WeghA Meijerink
Jan 15, 2004·Chemical Reviews·François Auzel
Jul 5, 2006·Chemistry : a European Journal·Florian StadlerWolfgang Schnick
Oct 4, 2008·Nature·Gopalakrishnan BalasubramanianJörg Wrachtrup
Oct 7, 2009·Acta Crystallographica. Section C, Crystal Structure Communications·Michael KringsRichard Dronskowski
Dec 22, 2009·Physical Chemistry Chemical Physics : PCCP·Bryan M van der EndeAndries Meijerink
Apr 7, 2010·Physical Review Letters·V M AcostaD Budker
Jun 1, 2011·Angewandte Chemie·Markus Haase, Helmut Schäfer
Jun 9, 2012·Science·P C MaurerM D Lukin
Apr 27, 2013·Nature·D Le SageR L Walsworth
Aug 2, 2013·Nature·G KucskoM D Lukin
Sep 13, 2014·Nature Communications·Silvia Arroyo-CamejoGopalakrishnan Balasubramanian
Apr 23, 2015·Nature Materials·Philipp PustWolfgang Schnick
Jun 23, 2015·Nature Methods·David R GlennColin B Connolly
Sep 15, 2015·Optics Express·Jonas Botterman, Philippe F Smet
Sep 24, 2015·Chemical Reviews·Huayna Terraschke, Claudia Wickleder
Jan 14, 2016·The Journal of Physical Chemistry Letters·Chun Che LinRu-Shi Liu
Aug 31, 2016·Topics in Current Chemistry·Yuan-Chih LinMarco Bettinelli
Jun 9, 2011·Materials·Paul LeblansPeter Willems
Jul 13, 2018·Angewandte Chemie·Bogdan M BeninMaksym V Kovalenko
Aug 29, 2018·Nature·Qiushui ChenXiaogang Liu
Nov 28, 2018·Nature Communications·K AraiR L Walsworth
Dec 7, 2018·Physical Chemistry Chemical Physics : PCCP·Olivier Q De ClercqDirk Poelman
Apr 2, 2019·Chemistry of Materials : a Publication of the American Chemical Society·Olga NazarenkoMaksym V Kovalenko
Apr 25, 2019·Nature Communications·Gregor J HoerderHubert Huppertz

❮ Previous
Next ❯

Methods Mentioned

BETA
electron paramagnetic resonance

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.