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|Title:||Fluorescence and two-photon absorption of push-pull aryl(bi)thiophenes: structure-property relationships|
Castro, M. Cidália R.
Raposo, M. Manuela M.
|Publisher:||Royal Society of Chemistry|
|Journal:||Photochemical & Photobiological Sciences|
|Abstract(s):||Photophysical and TPA properties of series of push-pull aryl(bi)thiophene chromophores bearing electron-donating (D) and electron-withdrawing (A) end-groups of increasing strength are presented. All compounds show an intense Intramolecular Charge Transfer (ICT) absorption band in the visible region. Increasing the D and/or A strength as well as the length of the conjugated path induces a bathochromic and hyperchromic of the absorption band as reported for analogous push-pull polyenes. Yet, in contrast with corresponding push-pull polyenes, a significant increase in fluorescence is observed. In particular, chromophores built from a phenyl-bithienyl conjugated path and bearing strong D and A end-groups were found to combine very large one and two-photon brightness as well as strong emission in the red/NIR region. These molecules hold promises as biphotonic fluorescent probes for bioimaging.|
|Description:||Special Issue in honor of Jean-Pierre Sauvage|
|Appears in Collections:||CDQuim - Artigos (Papers)|
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|J. Photochem. Photobiol. Sci. 2102.pdf||manuscript||1,66 MB||Adobe PDF||View/Open|
|J. Photochem. Photobiol. Sci.- Supp. information.pdf||Manuscript-Supporting information||158,55 kB||Adobe PDF||View/Open|