Tribolumineszenzspektren von dotierten Zinksulfiden und ihr Zusammenhang zu Fotolumineszenzspektren1

Meyer, K.; Obrikat, D.

doi:10.1515/zpch-1969-24035

Cited by 10 publications

(4 citation statements)

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“…Acenaphthene was reported to emit light on periodic deformation, but the emission was erratic as a function of time rather than periodic, clearly indicating random small fracture events; moreover, its triboluminescence is quenched under 2-propanol and hexane 35 and thus must be dependent on a gas discharge. Only doped salts have been shown to generate triboluminescence by deformation alone: their defects migrate and excite luminescent centers. ,,− A similar mechanism in many organics would be consistent with the observed mobility and trapping of excitons in aromatics by impurities or other defects. − Such a mechanism would not be expected to correlate with crystal symmetry as is usually the case. We are convinced that at least an elastic deformation always occurs and is necessary for piezoelectric polarization but that deformation alone is not the source of the electronic excitation in triboluminescence except in the doped salts.…”

Section: Discussionmentioning

confidence: 93%

Crystal Structure and Triboluminescence 2. 9-Anthracenecarboxylic Acid and Its Esters

et al. 1997

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Triboluminescence activity is usually assumed to be a consequence of crystal dissymmetry; however, the multitude of reports of centrosymmetric triboluminescent materials cast doubt on that assumption. We examine here the connection between triboluminescence and crystal symmetry without prejudice, by synthesizing 12 esters of 9-anthracenecarboxylic acid and correlating their triboluminescence activity and that of the acid with crystal structure, purity, and photoluminescence. In this series, a noncentrosymmetric crystal structure is necessary but not sufficient for triboluminescence in relatively pure materials; impurities are necessary for triboluminescence activity in all centrosymmetric and one noncentrosymmetric materials. Crystallization motif and other structure factors were only weakly correlated with triboluminescence. The results provide evidence in support of a charge separation and recombination mechanism for the excitation of the triboluminescence.Supporting Information Available: For 3-4 and 6-12, complete lists of atomic coordinates, bond lengths, bond angles, and anisotropic displacement coefficients (52 pages); for 2-4 and 6-12, correlation of crystal cell parameters with stacking motif (1 page); and observed and calculated structure factors (46 pages). Ordering information is given on the current masthead page. CM960438R

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Section: Discussionmentioning

confidence: 93%

Crystal Structure and Triboluminescence 2. 9-Anthracenecarboxylic Acid and Its Esters

et al. 1997

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“…The evidence for the doped materials is quite strong. For example, the triboluminescence spectrum of ZnS:10 -3 Cu,Cl has a strong band that is absent from its photoluminescence emission but characteristic of its electroluminescence …”

Section: Discussionmentioning

confidence: 99%

“…For example, the triboluminescence spectrum of ZnS:10 -3 Cu,Cl has a strong band that is absent from its photoluminescence emission but characteristic of its electroluminescence. 167 In addition, the lifetime of its photoluminescence is 7 ms, much longer than the lifetimes of 17 and 26 µs for triboluminescence and electroluminescence, respectively. 40 It is unlikely that the emission spectra of 16, 19, and 21-23 would be any different whether they are excited by UV-vis radiation, electron bombardment, or applied voltage, as they will all be dominated by the same intense chromophores.…”

Section: A Discharge Might Occur But Excitation Of Tribopho-mentioning

confidence: 99%

Triboluminescence with and without Air

Sweeting

2001

Chem. Mater.

159

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Twenty-three triboluminescent organic and inorganic materials were examined for crystal symmetry, differences between photoluminescence and triboluminescence emission spectra, spectroscopic evidence of an electrical discharge, and persistence of activity under liquids; some were also tested under other atmospheres. These experiments indicate that 18 materials were excited by a discharge, by either electron bombardment of the material or secondary excitation by the UV emissions of the surrounding gas. Five are apparently excited without a discharge, probably by the defect recombination characteristic of deformation luminescence.

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“…In the 17th century, only five papers were published on ML ; in the 18th century, 15 papers were published ; in the 19th century, 19 papers were published ; in the 20th century, ~ 372 papers were published …”

Section: Literature Surveymentioning

confidence: 99%

Survey of the literature on mechanoluminescence from 1605 to 2013

2014

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Mechanoluminescence (ML) is a type of luminescence induced by any mechanical action on solids. The light emissions induced by elastic deformation, plastic deformation and fracture of solids are called elastico ML (EML), plastico ML (PML) and fracto ML (FML), respectively. Whereas nearly 50% of all organic molecular solids and inorganic salts exhibit FML, only a few solids exhibit EML and PML. The EML and FML of certain solids are so intense that they can be seen during daylight with the naked eye. Mechanolumnescence has a great potential for use in different types of mechano-optical devices such as stress sensors, damage sensors, impact sensors, fracture sensors and safety management monitoring systems. This article reports a survey of the literature from 1605 to 2013. Mechanoluminescence is studied by physicists, chemists, material scientists, geologists, medical scientists, engineers and technologists, among others and researchers will certainly benefit from the literature survey on ML given here. In addition, the field of mechanoluminescence may attract the interest of many new researchers.

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Tribolumineszenzspektren von dotierten Zinksulfiden und ihr Zusammenhang zu Fotolumineszenzspektren1

Cited by 10 publications

References 0 publications

Crystal Structure and Triboluminescence 2. 9-Anthracenecarboxylic Acid and Its Esters

Crystal Structure and Triboluminescence 2. 9-Anthracenecarboxylic Acid and Its Esters

Triboluminescence with and without Air

Survey of the literature on mechanoluminescence from 1605 to 2013

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