Transient Excited-State Absorption and Gain Spectroscopy of a Two-Photon Absorbing Probe with Efficient Superfluorescent Properties

    Authors

    K. D. Belfield; M. V. Bondar; A. R. Morales; X. L. Yue; G. Luchita;O. V. Przhonska

    Comments

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    Abbreviated Journal Title

    J. Phys. Chem. C

    Keywords

    STIMULATED-EMISSION-DEPLETION; OPTICAL-DATA STORAGE; FLUORENE; DERIVATIVES; FLUORESCENCE MICROSCOPY; CHARGE-TRANSFER; SINGLET OXYGEN; FEMTOSECOND; DYNAMICS; CHROMOPHORES; RESOLUTION; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

    Abstract

    The synthesis, linear photophysical properties, two-photon absorption (2PA), excited-state transient absorption, and gain spectroscopy of a new fluorene derivative tertbutyl 4,4'-(4,4' (1E,1'E)-2,2'-(9,9-bis(2-(2-ethoxyethoxy)ethyl)-9H-fluorene-2,7-diyl)bis(ethene-2,1-diyl)bis(4,1 phenylene)]dipiperazine-1-carboxylate (1) are reported. The steady-state linear absorption and fluorescence spectra along with excitation anisotropy, fluorescence lifetimes, and photochemical stability of 1 were investigated in a number of organic solvents at room temperature. The 2PA spectra of 1 with a maximum cross section of 300 GM were obtained with a 1-kHz femtosecond laser system using open-aperture Z-scan and two-photon-induced fluorescence methods. The transient excited-state absorption (ESA) and gain kinetics of 1 were investigated by a femtosecond pump probe methodology. Fast relaxation processes (similar to 1-2 ps) in the gain and ESA spectra of 1 were revealed in ACN solution, attributable to symmetry-breaking effects in the first excited state. Efficient superfluorescence properties of 1 were observed in a nonpolar solvent under femtosecond excitation. One- and two-photon fluorescence microscopy imaging of HCT 116 cells incubated with probe 1 was accomplished, suggesting the potential of this new probe in two-photon fluorescence microscopy bioimaging.

    Journal Title

    Journal of Physical Chemistry C

    Volume

    116

    Issue/Number

    20

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    11261

    Last Page

    11271

    WOS Identifier

    WOS:000304338500054

    ISSN

    1932-7447

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