Title

Three-Photon Absorption Enhancement In Symmetrical Charge Transfer Pull-Pull Fluorene Derivatives

Abstract

We report the multiphoton-induced upconversion fluorescence of 2,7-bisbenzothiazole-9,9-didecylfluorene (Acceptor-π-Acceptor) in hexane solution, pumping at wavelengths from 300 to 1200 nm, and its three-photon absorption cross-section at 1095 nm (σ3′=355×10-78cm6s2photon- 2 for the transition S0 → S1). The multiphoton-induced fluorescence emission and the absorption measurements of 2,7-bisbenzothiazole-9,9-didecylfluorene in hexane were performed with a tunable OPG pumped by a Nd-YAG picosecond laser. It is demonstrated that the strong symmetrical electron-transfer from the electron rich fluorene core to the two electron-withdrawing benzothiazole end groups enhances σ3′. An increase of approximately four and nine fold, with respect to its Donor-π-Donor and Acceptor-π-Donor counterparts, respectively, was observed. © 2005 Elsevier B.V. All rights reserved.

Publication Date

5-2-2005

Publication Title

Chemical Physics Letters

Volume

406

Issue

4-6

Number of Pages

462-466

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.cplett.2005.03.037

Socpus ID

16644385464 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/16644385464

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