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Mono\u2010, di\u2010, and trimetallic copper and silver complexes were synthesized with this ligand. The hybrid character of the ligand led to compounds with rich luminescence properties. These include coumarin\u2010based blue fluorescence, observed as a sole emission in solution at room temperature, and green phosphorescence, which is efficient at low temperatures and dominates the spectra of the metal complexes. In the rigid environment of frozen solutions, the green phosphorescence shows an unusually long (for metal complexes) decay on the seconds timescale in high quantum yield. In addition, a red phosphorescence, which may be assigned to the triplet state localized in the phosphine\u2010M<jats:sub>3<\/jats:sub>Cl<jats:sub>2<\/jats:sub> (M=Cu, Ag), is observed for the trinuclear complexes at low temperature. Neither the second\u2010long phosphorescence nor the red emission is observed for the coumarin ligand, thus they must be a result of the coordination to coinage metal clusters. The excited states in these compounds were also investigated by femtosecond transient absorption spectroscopy and quantum chemical calculations.<\/jats:p>","DOI":"10.1002\/chem.202300497","type":"journal-article","created":{"date-parts":[[2023,3,17]],"date-time":"2023-03-17T12:39:53Z","timestamp":1679056793000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Phase\u2010Dependent Long Persistent Phosphorescence in Coumarin\u2010Phosphine\u2010Based Coinage Metal Complexes"],"prefix":"10.1002","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6898-557X","authenticated-orcid":false,"given":"Vanitha R.","family":"Naina","sequence":"first","affiliation":[{"name":"Institute of Inorganic Chemistry Karlsruhe Institute of Technology  Engesserstra\u00dfe 15 76131 Karlsruhe Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akhil K.","family":"Singh","sequence":"additional","affiliation":[{"name":"Institute of Inorganic Chemistry Karlsruhe Institute of Technology  Engesserstra\u00dfe 15 76131 Karlsruhe Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pascal","family":"Rauthe","sequence":"additional","affiliation":[{"name":"Institute of Physical Chemistry Karlsruhe Institute of Technology  Fritz-Haber-Weg 2 76131 Karlsruhe Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sergei","family":"Lebedkin","sequence":"additional","affiliation":[{"name":"Institute of Nanotechnology Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz\u20051  76344 Eggenstein-Leopoldshafen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6212-3968","authenticated-orcid":false,"given":"Michael T.","family":"Gamer","sequence":"additional","affiliation":[{"name":"Institute of Inorganic Chemistry Karlsruhe Institute of Technology  Engesserstra\u00dfe 15 76131 Karlsruhe Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1199-1730","authenticated-orcid":false,"given":"Manfred M.","family":"Kappes","sequence":"additional","affiliation":[{"name":"Institute of Physical Chemistry Karlsruhe Institute of Technology  Fritz-Haber-Weg 2 76131 Karlsruhe Germany"},{"name":"Institute of Nanotechnology Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz\u20051  76344 Eggenstein-Leopoldshafen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1225-5460","authenticated-orcid":false,"given":"Andreas\u2010Neil","family":"Unterreiner","sequence":"additional","affiliation":[{"name":"Institute of Physical Chemistry Karlsruhe Institute of Technology  Fritz-Haber-Weg 2 76131 Karlsruhe Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0915-3893","authenticated-orcid":false,"given":"Peter W.","family":"Roesky","sequence":"additional","affiliation":[{"name":"Institute of Inorganic Chemistry Karlsruhe Institute of Technology  Engesserstra\u00dfe 15 76131 Karlsruhe Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,4,21]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1039\/C5CS00582E"},{"key":"e_1_2_8_2_1","volume":"12","author":"Wu S.","year":"2020","journal-title":"Nano-Micro Lett."},{"key":"e_1_2_8_3_1","doi-asserted-by":"crossref","DOI":"10.1002\/ejic.202100976","author":"Mu B.","year":"2022","journal-title":"Eur. 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