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In this study, a class of benzimidazo[1,2\u2010c]quinazoline derivatives with aggregation\u2010induced emission (AIE) enhancement (AIEE) activity is reported. The core scaffold is a benzimidazo[1,2\u2010c]quinazoline core and a near\u2010vertical core of benzene rings substituted at the C\n                    <jats:sub>6<\/jats:sub>\n                    position. By changing the substituents of the aryl ring on C\n                    <jats:sub>6<\/jats:sub>\n                    , it is possible not only to change the position of the electron distribution on the molecular backbone but also to redshift the maximum fluorescence emission wavelength by 93\u2009nm. Computational and single\u2010crystal results show that the molecules exhibit state\u2010dependent photophysical properties upon aggregation with abundant cross\u2010space interactions (\u03c0\u2010dimer between two quinazoline planar backbones, multiple N\u00b7\u00b7\u00b7H\u2010Ar hydrogen bonds, van der Waals forces, etc.), and these multiple interactions not only extend the electron\u2010conjugated system but also stabilize the conformation of the molecule after aggregation and enhance the fluorescence intensity.\n                  <\/jats:p>","DOI":"10.1002\/cplu.202500349","type":"journal-article","created":{"date-parts":[[2025,7,25]],"date-time":"2025-07-25T15:24:56Z","timestamp":1753457096000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Benzimidazo[1,2\u2010c]Quinazolines Luminescent Materials: Synthesis, Molecular Packing, and Aggregation Effects"],"prefix":"10.1002","volume":"90","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7999-4826","authenticated-orcid":false,"given":"Chunhua","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Physics and Telecommunications Engineering Zhoukou Normal University  Zhoukou 466001 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bowen","family":"Li","sequence":"additional","affiliation":[{"name":"School of Physics and Telecommunications Engineering Zhoukou Normal University  Zhoukou 466001 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peige","family":"Qin","sequence":"additional","affiliation":[{"name":"The Key Laboratory of Rare Earth Functional Materials and Applications Zhoukou Normal University  Zhoukou 466001 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanhu","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Hunan University  Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-7023-5459","authenticated-orcid":false,"given":"Jiangpei","family":"Yuan","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Hunan University  Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-9728-6496","authenticated-orcid":false,"given":"Qilong","family":"Bian","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Hunan University  Changsha 410082 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,7,25]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/ar3003464"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsami.7b14343"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/agt2.34"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aca.2017.11.046"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1039\/c3tc31573h"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202104125"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.matt.2024.07.017"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1039\/D4CC03693J"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/agt2.10"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsbiomaterials.2c00656"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2TC02512D"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1039\/c1cs15113d"},{"key":"e_1_2_8_14_1","first-page":"2414188","author":"Ma F.","year":"2024","journal-title":"Adv. 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