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In the dendrimer absorption spectra contributions from both the branches and the core are clearly identified. The fluorescence spectra show only the characteristic fluorescence of the terphenyl unit. Energy transfer from the appended chromophoric groups to the core does not occur. In the dendrimers, the terphenyl core exhibits a very high fluorescence quantum yield (ca. 0.75) and a short emission lifetime (0.8 ns). These properties allowed investigations of the fluorescence depolarization caused by rotation of the dendrimers. The dendrimers show a very high steady\u2010state anisotropy in dichloromethane solution at room temperature (0.24 for the largest one), compared to that of the parent terphenyl under the same experimental conditions (&lt;0.01) and in rigid matrix (0.33). Both the n\u2010octyl chains and the sulfonimide branches play important roles to slow down the molecular rotation.<\/jats:p>","DOI":"10.1002\/cphc.200600259","type":"journal-article","created":{"date-parts":[[2006,8,10]],"date-time":"2006-08-10T05:19:24Z","timestamp":1155187164000},"page":"1980-1984","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["A Photophysical Study of Terphenyl Core Oligosulfonimide Dendrimers Exhibiting High Steady\u2010State Anisotropy"],"prefix":"10.1002","volume":"7","author":[{"given":"Giacomo","family":"Bergamini","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paola","family":"Ceroni","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vincenzo","family":"Balzani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria","family":"Del Mar Villavieja","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ramchandra","family":"Kandre","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Igor","family":"Zhun","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Oleg","family":"Lukin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,9]]},"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"},{"volume-title":"Dendrons and other Dendritic Polymers,","year":"2001","key":"e_1_2_6_3_2"},{"key":"e_1_2_6_4_2","unstructured":"For recent reviews see:"},{"key":"e_1_2_6_5_2","unstructured":"Prog. 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