Innovative triboluminescence study of multivitamin doped europium tetrakis

Abstract

As the Space Shuttle program ends, NASA is developing the next generation of space vehicles. These new concept designs will require new and innovative structural health monitoring capabilities. One way to solve this problem is with smart impact sensors that use triboluminescent materials. In 2011, the authors reported an 82% increase in the triboluminescence yield of europium dibenzoylmethide triethylammonium (EuD4TEA) by changing the starting material. It has been shown that introduction of dopants tends to enhance the triboluminescent light yield. Here we report the successful synthesis of a multivitamin doped europium tetrakis which appears to be spherical in shape. Inductively Coupled Plasma – Optical Emission Spectroscopy analysis showed the presence of 3.6% calcium, 0.62% magnesium, 0.1% iron, 0.01% copper and manganese. This new product has no shift in the triboluminescent or photoluminescent emission peaks, but only a change in the intensity. In addition, the doped EuD4TEA powder statistically emits more triboluminescence while having the same decay time. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Triboluminescence: Recalling Interest and New Aspects

“…49 Given that EuD 4 TEA was reported to exhibit extremely brilliant TL up to 206% of that of ZnS:Mn when subjected to low-energy impacts, many EuD 4 TEA derivatives were prepared to seek more TL compounds. 50 The structural modification was focused on coordination with different ligands of b-diketone and aromatic amine or the utilization of different counter ions. These strategies can alter the chelate structure, thus resulting in a change in the molecule packing arrangement in the crystal.…”

“…Reprinted from Fontenot et al47 (B) TL spectrum. Reprinted with permission from Fontenot et al50 Copyright 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. (C) PL decay spectrum and TL image of EuD 4 TEA.…”

Synthesis conditions of europium tetrakis dibenzoylmethide triethylammonium crystals

“…Fontenot et al. have investigated the effect of multivitamin doping on EuD 4 TEA . They found an 80% increase in TL yield for crystals doped with multivitamin.…”

Triboluminescence Phenomenon Based on the Metal Complex Compounds—A Short Review

“…The solvent has an impact on the int sity of triboluminescence and decay time of EuD4TEA [21]. Additionally, it was found t replacing anhydrous ethanol with laboratory ethanol has no impact on the TL results [2 Moreover, doping EuD4TEA complex with organic substances such as piperi DMMP, TEPS [20], uranium [22], or even multivitamin [23] affect TL properties, which a useful feature for further application as an element of sensors. The influence of orga dopants will be discussed in chapter 6.…”

“…Moreover, doping EuD 4 TEA complex with organic substances such as piperine, DMMP, TEPS [ 20 ], uranium [ 22 ], or even multivitamin [ 23 ] affect TL properties, which is a useful feature for further application as an element of sensors. The influence of organic dopants will be discussed in chapter 6.…”