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Each luminophore shares one phenyl group with the [2.2]paracyclophane, resulting in a rigid and strained structure that forces the two luminophores into close proximity. As a consequence, the photoluminescence of the mechanophore in THF solution and in solid films of a polyurethane containing the new motif is dominated by excimer emission. Stretching the polymer films causes an easily discernible change from bright yellow excimer to blue\u2013green monomer\u2010dominated emission. The ratio of excimer to monomer emission intensities traces the nonlinear stress\u2013strain curves of the polymer well and is a good indicator for the macroscopically applied force. The reversibility of the mechanoresponse, theoretical analyses, and reference experiments with a similar mechanophore in which the emitters and the [2.2]paracyclophane core are connected by flexible linkers support the conclusion that the mechanoactivation is caused by distorting the molecule into a bent, more open conformation and not the scission of covalent bonds. The operating principle was further confirmed by investigating a second hinge\u2010like mechanophore based on a [2.2]paracyclophane core and 1,4\u2010bis(phenylethynyl)benzene emitters.<\/jats:p>","DOI":"10.1002\/anie.202510114","type":"journal-article","created":{"date-parts":[[2025,7,2]],"date-time":"2025-07-02T09:57:07Z","timestamp":1751450227000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Hinge\u2010Like Mechanochromic Mechanophores Based on [2.2]Paracyclophane"],"prefix":"10.1002","volume":"64","author":[{"given":"Shohei","family":"Shimizu","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering Institute of Science Tokyo  2\u201012\u20101 Ookayama, Meguro\u2010ku Tokyo 152\u20138550 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jess M.","family":"Clough","sequence":"additional","affiliation":[{"name":"Adolphe Merkle Institute University of Fribourg  Chemin des Verdiers 4 Fribourg CH\u20101700 Switzerland"},{"name":"NCCR Bio\u2010inspired Materials University of Fribourg  Chemin des Verdiers 4 Fribourg CH\u20101700 Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christoph","family":"Weder","sequence":"additional","affiliation":[{"name":"Adolphe Merkle Institute University of Fribourg  Chemin des Verdiers 4 Fribourg CH\u20101700 Switzerland"},{"name":"NCCR Bio\u2010inspired Materials University of Fribourg  Chemin des Verdiers 4 Fribourg CH\u20101700 Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2502-3041","authenticated-orcid":false,"given":"Yoshimitsu","family":"Sagara","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering Institute of Science Tokyo  2\u201012\u20101 Ookayama, Meguro\u2010ku Tokyo 152\u20138550 Japan"},{"name":"Research Center for Autonomous Systems Materialogy (ASMat) 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