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All of the ten examples share a common longer fluorenone\u2010based bis\u2010monodentate ligand, equipped with <jats:italic>meta<\/jats:italic>\u2010pyridine donor groups. The ring size (3\u2010 vs. 4\u2010membered) and conformational preference (bowl vs. saddle) are controlled by the choice of the shorter ligand. These carry <jats:italic>para<\/jats:italic>\u2010pyridine donors, different aromatic backbones (benzene, thiophene or selenophene) and either no or small or bulky endohedral substituents, serving to control the nuclearity of the heteroleptic rings through different effects (ligand angle, charge distribution or backbone bulk). Moreover, the luminescence of the fluorenone ligand is conserved in the formed architectures. Emission intensity as well as host\u2013guest properties vary depending on the inward\u2010pointing functions. All Pd<jats:sub>3<\/jats:sub>A<jats:sub>3<\/jats:sub>B<jats:sub>3<\/jats:sub> assemblies are shown to bind chiral guest BINOL bis\u2010sulfonate which imparts its chirality to the entire host\u2013guest complex. This results in a guest\u2010induced circular dichroism (CD) and circularly polarized luminescence (CPL) with dissymmetry factor <jats:italic>g<jats:sub>lum<\/jats:sub><\/jats:italic> up to 10<jats:sup>\u22123<\/jats:sup>.<\/jats:p>","DOI":"10.1002\/anie.202413323","type":"journal-article","created":{"date-parts":[[2024,7,29]],"date-time":"2024-07-29T08:10:33Z","timestamp":1722240633000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Ring\u2010Size Control and Guest\u2010Induced Circularly Polarized Luminescence in Heteroleptic Pd<sub>3<\/sub>A<sub>3<\/sub>B<sub>3<\/sub> and Pd<sub>4<\/sub>A<sub>4<\/sub>B<sub>4<\/sub> Assemblies"],"prefix":"10.1002","volume":"63","author":[{"given":"Kristina E.","family":"Ebbert","sequence":"first","affiliation":[{"name":"Department of Chemistry and Chemical Biology TU Dortmund University  Otto-Hahn-Strasse\u20056 44227 Dortmund 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