Title

Three-Photon Absorption Enhancement In A Symmetrical Charge Transfer Fluorene Derivative

Abstract

In this letter we report the three-photon absorption-induced upconversion fluorescence emission and the three-photon absorption cross-section of two fluorene derivatives with D-π-D (9,9-didecyl-2,7-bis-(N,N-diphenylamino) fluorene) and D-π-A ((7-benzothiazol-2-yl-9,9-didecylfluoren-2-yl) diphenylamine) structural motifs. The three-photon absorption cross-section of the D-π-D analog (σ3′=82×10 -78 cm6s2photon-2) is 2.2 times greater than that of its D-π-A counterpart (σ3′=37×10-78 cm6s 2photon-2), showing that symmetric charge transfer enhances 3PA. The three-photon-excitation of these two compounds in hexane solution (9.8×10-3 M) was accomplished with a tunable OPG pumped by picosecond laser pulses. The three-photon absorption coefficients were measured using an open aperture Z-scan technique. © 2004 Elsevier B.V. All rights reserved.

Publication Date

6-11-2004

Publication Title

Chemical Physics Letters

Volume

391

Issue

1-3

Number of Pages

22-26

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.cplett.2004.04.051

Socpus ID

2542491334 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/2542491334

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