Title

Linear And Two-Photon Photophysical Properties Of A Series Of Symmetrical Diphenylaminofluorenes

Abstract

A series of linear, symmetrical, diphenylaminofluorene-based materials are reported. The series investigated was model 9,9-didecyl-2,7-bis(N,N-diphenylamino)fluorene (1), oligomer 9,9-didecyl-N,N-bis(9,9-didecyl-7-N,N-diphenylaminofluoren-2-yl)-N, N-diphenyl-fluorene-2,7-diamine (2), and poly(9,9-didecyl-2,7-diphenylaminofluorene) (3). Structural characterization and photophysical properties, including linear absorption, quantum yields, single photon fluorescence, and two-photon absorption (2PA) spectra, were studied in polar and nonpolar solvents. 2PA spectra were determined by two independent methods: a nonlinear transmission method employing a femtosecond white-light continuum (WLC) and a two-photon fluorescence (2PF) method. Polymer 3, a low-molecular-weight polymer with fourteen fluorene units, exhibited a very large two-photon absorption cross-section of 17 200 and 6800 × 10-50 cm4 s photon-1 molecule-1 as estimated from the WLC and 2PF methods, respectively.

Publication Date

6-1-2004

Publication Title

Chemistry of Materials

Volume

16

Issue

11

Number of Pages

2267-2273

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/cm035253g

Socpus ID

2542476061 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/2542476061

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