{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T21:12:47Z","timestamp":1787865167668,"version":"build-2784847793"},"reference-count":67,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2008,11,26]],"date-time":"2008-11-26T00:00:00Z","timestamp":1227657600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["ChemPhysChem"],"published-print":{"date-parts":[[2009,1,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Novel dendrimers <jats:bold>G2PC<\/jats:bold> and <jats:bold>G4PC<\/jats:bold> consisting of a <jats:italic>p<\/jats:italic>\u2010pentaphenylene core (<jats:bold>PC<\/jats:bold>) appended in the <jats:italic>para<\/jats:italic> position with two second\u2010generation (<jats:bold>G2<\/jats:bold>) or two fourth\u2010generation (<jats:bold>G4<\/jats:bold>) sulfonimide branches and two n\u2010octyl chains, as well as a model compound of the pentaphenylene core (<jats:bold>G0PC<\/jats:bold>), are prepared. The photophysical properties (absorption, emission, and excitation spectra; fluorescence decay lifetime; and fluorescence anisotropy spectra) of the three compounds are investigated under different experimental conditions (dichloromethane solution and solid state at 293 K, dichloromethane\/methanol rigid matrix at 77 K). In the absorption spectra contributions from both the branches and the core can be clearly identified. The fluorescence spectra show only the characteristic fluorescence of the pentaphenylene unit with <jats:italic>\u03bb<\/jats:italic><jats:sub>max<\/jats:sub> around 410 nm in fluid solution and 420 nm in the solid state. In solution the fluorescence quantum yields are 0.78, 0.76, and 0.72 for <jats:bold>G0PC<\/jats:bold>, <jats:bold>G2PC<\/jats:bold>, and <jats:bold>G4PC<\/jats:bold>, respectively, and the fluorescence lifetime is about 0.7 ns in all cases. Energy transfer from the chromophoric groups of the dendrimer branches to the core does not occur. The three compounds show the same, high steady\u2010state anisotropy value (0.35) in dilute rigid\u2010matrix solution at 77 K. In dichloromethane at 293 K, the increasing anisotropy values along the series <jats:bold>G0PC<\/jats:bold> (0.17), <jats:bold>G2PC<\/jats:bold> (0.27), and <jats:bold>G4PC<\/jats:bold> (0.32), with increasing molecular volume of the three compounds, show that depolarization takes place by molecular rotation. In the solid state the anisotropy is very low (0.015, 0.017, and 0.035 for <jats:bold>G0PC<\/jats:bold>, <jats:bold>G2PC<\/jats:bold>, and <jats:bold>G4PC<\/jats:bold>, respectively), probably because of fast depolarization via energy migration.<\/jats:p>","DOI":"10.1002\/cphc.200800597","type":"journal-article","created":{"date-parts":[[2008,11,26]],"date-time":"2008-11-26T13:22:03Z","timestamp":1227705723000},"page":"265-269","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Dendrimers with a Pentaphenylene Core: A Photophysical Study"],"prefix":"10.1002","volume":"10","author":[{"given":"Giacomo","family":"Bergamini","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paola","family":"Ceroni","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincenzo","family":"Balzani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ramchandra","family":"Kandre","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oleg","family":"Lukin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2009,1,7]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1002\/3527600612"},{"key":"e_1_2_6_3_2","volume-title":"Dendrimers and other Dendritic Polymers","year":"2001"},{"key":"e_1_2_6_4_2","volume-title":"Dendritische Molek\u00fcle","author":"V\u00f6gtle F.","year":"2007"},{"key":"e_1_2_6_5_2","unstructured":"Recent reviews:"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1039\/b716441f"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/ar8000074"},{"key":"e_1_2_6_8_2","unstructured":"Special Issue on Dendrimers (Ed.: J.\u2010P. 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