| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 176794 | Dyes and Pigments | 2012 | 8 Pages |
A series of symmetrical and asymmetrical (multi)branched truxene derivatives have been synthesized by incorporating different π-conjugated functional groups to truxene. Linear absorption and single- and two-photon excited fluorescence properties of the obtained compounds were examined. The spectral data combining the results of theoretical calculation and the X-ray crystal structures demonstrate that the intramolecular charge transfer of the C3-symmetric truxene-core compounds keep independence of every branch and shifts site-to-site upon excitation. The asymmetric molecule SN behaves the intramolecular excitation transfer between more than two energy levels, which maybe different from the symmetric ones. Meanwhile, the C3-symmetric octupolar conformation and the C(sp2) = C(sp2) π-linker are effective structural pattern for two-photon absorption compounds.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Several symmetrical and asymmetrical truxene derivatives have been synthesized. ► Their photophysical properties and the X-ray crystal structures were explored. ► The results indicated that the symmetric dyes behaved a site-to-site charge shift. ► However, the asymmetrical dye was different from the symmetrical ones.
