Fluorescence sensing of microcracks based on cycloreversion of a dimeric anthracene moiety

Improving autonomous self healing via combined chemical/physical principles

“…Other concepts are based on fluorescent crack sensors [54] where the mechanochemical activation yields fluorescence at the site of the damage. For this purpose, two anthracene derivatives, 9-anthraldehyde and 9-anthracenecarboxylic acid grafted onto poly(vinyl alcohol) can be photo-dimerized, in turn yielding nonfluorescent cyclooctane-type dimers, which act as crosslinking points.…”

Crystal structure of 9,10-bis-(2,6-difluorophenyl)-anthracene, C26H14F4

“…Three of the main applications are the fluorescence sensors [1],optoelectronic materials [2] and solar cells [3]. Analogous to the known anthracene derivates, 9,10-diphenyl-anthracene shows blue fluorescence.…”

A microcapsule-type fluorescent probe for the detection of microcracks in cementitious materials

“…In addition, the fluorescent dyeloaded microcapsules can be embedded into a variety of coating materials. Furthermore, fluorescence crack probing generally offer the advantages of excellent visibility of cracked region and ease of detection of exact crack position [14].…”

“…The fluorescent crack sensors have been developed based on dimeric styrylpyrylium [12], cinnamate [13] and anthracene [14] moieties. It was demonstrated that, upon cracking, the sensors underwent bond cleavage of the dimeric structures followed by regeneration of the monomeric styrylpyrylium, cinnamate, or anthracene moieties having strong fluorescence.…”