{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T05:09:49Z","timestamp":1781068189068,"version":"3.54.1"},"reference-count":34,"publisher":"Wiley","issue":"47","license":[{"start":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T00:00:00Z","timestamp":1754092800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2025,8,21]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Stimuli\u2010responsive fluorescence materials are crucial in developing intelligent materials and have wide applications in anti\u2010counterfeiting and information encryption. However, organic fluorescence dyes with strong \u03c0\u2010\u03c0 intermolecular interactions and dense molecular packing lead to inertia ability of stimuli\u2010responsive. Here, we design and synthesize spacer group modified naphthalimide compounds (<jats:bold>P1<\/jats:bold> and <jats:bold>P2<\/jats:bold>) with acidichromism and mechanochromism properties. Photoinduced electron transfer (PET) between naphthalimide and trimethylamine moieties quenches fluorescence of <jats:bold>P1<\/jats:bold> and <jats:bold>P2<\/jats:bold>. Then, fluorescence is obtained when <jats:bold>P1<\/jats:bold> and <jats:bold>P2<\/jats:bold> interact with hydrochloric acid (named <jats:bold>P1\u2010HCl<\/jats:bold> and <jats:bold>P2\u2010HCl<\/jats:bold>). More importantly, the spacer group modified <jats:bold>P1\u2010HCl<\/jats:bold> with a highly twisted conformation, preventing strong intermolecular \u03c0\u2010\u03c0 interactions and a compact packing structure, contributing to obvious mechanochromism, while <jats:bold>P2\u2010HCl<\/jats:bold> does not. Our study provides a molecular strategy to investigate the relationship between molecular chemical structure and stimuli\u2010responsive fluorescence properties and realizes anti\u2010counterfeiting applications.<\/jats:p>","DOI":"10.1002\/chem.202501233","type":"journal-article","created":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T10:04:02Z","timestamp":1754129042000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Spacer Group Modified Naphthalimide with Acidichromism and Mechanochromism for Anti\u2010Counterfeiting Application"],"prefix":"10.1002","volume":"31","author":[{"given":"Bing","family":"Fang","sequence":"first","affiliation":[{"name":"Beijing Key Laboratory of Special Elastomer Composite Materials College of New Materials and Chemical Engineering Beijing Institute of Petrochemical Technology  19 Qingyuan North Road Daxing District Beijing 102617 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Wang","sequence":"additional","affiliation":[{"name":"Beijing Key Laboratory of Special Elastomer Composite Materials College of New Materials and Chemical Engineering Beijing Institute of Petrochemical Technology  19 Qingyuan North Road Daxing District Beijing 102617 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mingyu","family":"Fan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology  North Third Ring Road 15 Beijing 100029 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianxiang","family":"Yu","sequence":"additional","affiliation":[{"name":"Beijing Key Laboratory of Special Elastomer Composite Materials College of New Materials and Chemical Engineering Beijing Institute of Petrochemical Technology  19 Qingyuan North Road Daxing District Beijing 102617 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8519-8578","authenticated-orcid":false,"given":"Meizhen","family":"Yin","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology  North Third Ring Road 15 Beijing 100029 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuhua","family":"Dai","sequence":"additional","affiliation":[{"name":"Beijing Key Laboratory of Special Elastomer Composite Materials College of New Materials and Chemical Engineering Beijing Institute of Petrochemical Technology  19 Qingyuan North Road Daxing District Beijing 102617 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,8,2]]},"reference":[{"key":"e_1_2_7_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202308848"},{"key":"e_1_2_7_1_2","doi-asserted-by":"publisher","DOI":"10.1021\/acsnano.8b01607"},{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202403203"},{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.3c04725"},{"key":"e_1_2_7_2_3","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202102180"},{"key":"e_1_2_7_2_4","doi-asserted-by":"publisher","DOI":"10.1039\/D4TC02555E"},{"key":"e_1_2_7_2_5","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202301070"},{"key":"e_1_2_7_2_6","doi-asserted-by":"publisher","DOI":"10.1016\/j.dyepig.2022.110808"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-024-49886-7"},{"key":"e_1_2_7_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202117158"},{"key":"e_1_2_7_3_3","volume":"16","author":"Wang J.","year":"2024","journal-title":"ACS Appl. 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