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The modular synthetic approach enables systematic variation of conformational constraint as a molecular design element for tailoring excited\u2010state properties. Cyclic voltammetry reveals irreversible dimerization of triarylamine derivatives lacking\n                    <jats:italic>para<\/jats:italic>\n                    \u2010substituents. Photophysical studies in the solid state, solution, and polymethylmethacrylate (PMMA) matrix reveal photoluminescence quantum yields (PLQY) of up to 70%, emission bandwidths as narrow as 2480\u2009cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    (47\u2009nm), and CIE 1931 coordinates approaching the standard blue point. Phenylene extension increases conformational constraint around the acceptor, inducing hypsochromically shifted emission and providing an additional structural handle for tuning the optical properties. Pronounced positive emission solvatochromism, aggregation\u2010induced emission enhancement (AIEE), temperature\u2010dependent spectroscopy, and quantum\u2010chemical calculations consistently indicate that conformational modulation governs charge\u2010transfer interactions, excited\u2010state relaxation, and triplet\u2010state accessibility. Together, the experimental and theoretical results establish structure\u2013property relationships that provide design principles for the rational engineering of future blue\u2010emissive organic chromophores.\n                  <\/jats:p>","DOI":"10.1002\/open.70308","type":"journal-article","created":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T06:45:58Z","timestamp":1790837158000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Conformational Control of Excited\u2010State Properties in\n                    <i>Ortho<\/i>\n                    \u2010Linked Triarylamine\u2010Based Donor\u2013Acceptor Conjugates"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0006-7151-7025","authenticated-orcid":false,"given":"Monika","family":"Fl\u00f6rke","sequence":"first","affiliation":[{"name":"Faculty of Mathematics and Natural Sciences Institut f\u00fcr Organische Chemie und Makromolekulare Chemie Heinrich\u2010Heine\u2010Universit\u00e4t D\u00fcsseldorf  D\u00fcsseldorf Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9809-724X","authenticated-orcid":false,"given":"Thomas J. 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