Mechanoluminescence during the rupture of human bony tissue

Krauya, U. É.; Knēts, Ivars; Laizan, V. B.

doi:10.1007/bf00859357

Cited by 1 publication

(1 citation statement)

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“…Others have observed similar correlations using tribophotoluminescent materials unrelated to each other structurally. 21,22 The examination of triboluminescence (also known as mechanoluminescence 23 or fractoemission 24 ) has thus far not been particularly systematic. Each factor affecting triboluminescence activity has been studied with a different set of materials, and observations on one crystalline compound have often been made on different samples in different laboratories, sometimes with different outcomes.…”

Section: Introductionmentioning

confidence: 99%

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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