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Further chemical modification of these phosphorus heterocycles with Hg(OAc)<jats:sub>2<\/jats:sub> in the presence of methanol resulted in the formation of \u03bb<jats:sup>5<\/jats:sup>\u2010phosphinines. The photophysical properties of a selected series of thienyl\u2010 and pyridyl\u2010functionalized pyrylium salts, \u03bb<jats:sup>3<\/jats:sup>\u2010 and \u03bb<jats:sup>5<\/jats:sup>\u2010phosphinines, were investigated and the results compared and supported by theoretical calculations on the DFT level. Significant fluorescence was observed for the pyrylium salts and \u03bb<jats:sup>5<\/jats:sup>\u2010phosphinines. In contrast, the heteroaromatic substituted \u03bb<jats:sup>3<\/jats:sup>\u2010phosphinines show very little emission which is consistent with the low oscillator strength predicted by DFT calculations for this \u03c0\u2192\u03c0* transition. Furthermore, all three classes of compounds show readily observable phosphorescence in solution, which was determined by time\u2010gated detection at low temperature.<\/jats:p>","DOI":"10.1002\/chem.200601650","type":"journal-article","created":{"date-parts":[[2007,3,9]],"date-time":"2007-03-09T04:38:29Z","timestamp":1173415109000},"page":"4548-4559","source":"Crossref","is-referenced-by-count":97,"title":["Donor\u2010Functionalized Polydentate Pyrylium Salts and Phosphinines: Synthesis, Structural Characterization, and Photophysical Properties"],"prefix":"10.1002","volume":"13","author":[{"given":"Christian","family":"M\u00fcller","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dorothee","family":"Wasserberg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jarno\u2005J.\u2005M.","family":"Weemers","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evgeny\u2005A.","family":"Pidko","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sandra","family":"Hoffmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Lutz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anthony\u2005L.","family":"Spek","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stefan\u2005C.\u2005J.","family":"Meskers","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ren\u00e9\u2005A.\u2005J.","family":"Janssen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rutger\u2005A.","family":"van\u2005Santen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dieter","family":"Vogt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2007,5,15]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.19660781817"},{"key":"e_1_2_6_2_3","first-page":"846","volume":"5","year":"1966","journal-title":"Angew. 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