Linear and two-photon photophysical properties of a series of symmetrical diphenylaminofluorenes

    Authors

    K. D. Belfield; A. R. Morales; J. M. Hales; D. J. Hagan; E. W. Van Stryland; V. M. Chapela;J. Percino

    Comments

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    Abbreviated Journal Title

    Chem. Mat.

    Keywords

    ABSORBING FLUORENE DERIVATIVES; BACKWARD-STIMULATED EMISSION; PHASE-CONJUGATION PROPERTIES; ABSORPTION CROSS-SECTIONS; MULTIBRANCHED; STRUCTURES; ONE-PHOTON; CHROMOPHORES; EXCITATION; MICROFABRICATION; PHOTOSTABILITY; Chemistry, Physical; Materials Science, Multidisciplinary

    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 x 10(-50) cm(4) s photon(-1) molecule(-1) as estimated from the WLC and 2PF methods, respectively.

    Journal Title

    Chemistry of Materials

    Volume

    16

    Issue/Number

    11

    Publication Date

    1-1-2004

    Document Type

    Article

    Language

    English

    First Page

    2267

    Last Page

    2273

    WOS Identifier

    WOS:000221683300031

    ISSN

    0897-4756

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