کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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176965 | 458961 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis, optical properties and ultrafast dynamics of a 2,1,3-benzothiadiazole-based red emitter with intense fluorescence and large two-photon absorption cross-section Synthesis, optical properties and ultrafast dynamics of a 2,1,3-benzothiadiazole-based red emitter with intense fluorescence and large two-photon absorption cross-section](/preview/png/176965.png)
A new 2,1,3-benzothiadiazole-based red fluorescent compound with a D–A–D type structure was synthesized and characterized. The central 2,1,3-benzothiadiazole core was symmetrically connected via the 4,7-positions with two donor groups in which the 7-position of a fluorenyl ring was substituted with a carbazol-9-yl moiety and the 2-position was substituted by a 5-thienyl moiety. The carbazol moieties were further derivatized by two 2-naphthyl moieties at the 3,6-positions. Femtosecond laser spectroscopic techniques including excited state fluorescence and pump-probe technique investigations, together with steady state absorption and one-photon fluorescence spectra, were employed to systematically investigate the optical properties and ultrafast dynamics of the new compound in tetrahydrofuran solution. It shows a large two-photon absorption cross-section and high fluorescence quantum yield, indicating potential application in two-photon fluorescence imaging field. The ultrafast dynamics results reveal competition between a pure excited state relaxation process and stimulated radiation in the red wavelength region.
The 2,1,3-benzothiadiazole based compound shows a large two-photon absorption cross-section and high fluorescence quantum yield, indicating potential application of this compound in TPF imaging.Figure optionsDownload as PowerPoint slideHighlights
► The thiadiazole shows a large two-photon absorption cross-section.
► Fluorescence properties indicate potential application in the imaging field.
► Ultrafast dynamics results reveal a competition process in the red wavelength range.
Journal: Dyes and Pigments - Volume 92, Issue 1, January 2012, Pages 573–579