Superfluorescent Squaraine with Efficient Two-Photon Absorption and High Photostability

    Authors

    K. D. Belfield; M. V. Bondar; H. S. Haniff; I. A. Mikhailov; G. Luchita;O. V. Przhonska

    Comments

    Authors: contact us about adding a copy of your work at [email protected]

    Abbreviated Journal Title

    ChemPhysChem

    Keywords

    density functional calculations; donor-acceptor systems; fluorescence; hydrogen bonds; photochemistry; EXCITED-STATE ABSORPTION; NONLINEAR-OPTICAL PROPERTIES; SINGLET OXYGEN; GENERATION; ONE-PHOTON; MOLECULAR DESIGN; CROSS-SECTIONS; QUANTUM; YIELDS; DYES; DERIVATIVES; POLYMETHINE; Chemistry, Physical; Physics, Atomic, Molecular & Chemical

    Abstract

    The synthesis, linear photophysical, two-photon absorption (2PA), femtosecond transient absorption, and superfluorescence properties of a new symmetrical squaraine derivative (1) are reported. Steady-state linear spectral and photochemical properties, fluorescence lifetimes, and excitation anisotropy of 1 were investigated in various organic solvents. High fluorescence quantum yields (approximate to 0.7) and very high photostability (photodecomposition quantum yields approximate to 10(-6)-10(-8)) were observed. An open-aperture Z-scan method was used to obtain 2PA spectra of 1 over a broad spectral range (maximum 2PA cross section approximate to 1000 GM). Excited-state absorption (ESA) and gain was observed by femtosecond transient absorption spectroscopy, in which both reached a maximum at approximately 500 fs. Squaraine 1 exhibits efficient superfluorescence. The quantum chemical study of 1 revealed the simulated vibronic nature of the 1PA and 2PA spectra were in good agreement with experimental data; this may provide the ability to predict potential advanced photonic materials.

    Journal Title

    Chemphyschem

    Volume

    14

    Issue/Number

    15

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    3532

    Last Page

    3542

    WOS Identifier

    WOS:000328674000018

    ISSN

    1439-4235

    Share

    COinS
     

    Accessibility Statement

    This item was created or digitized prior to April 24, 2027, or is a reproduction of legacy media created before that date. It is preserved in its original, unmodified state specifically for research, reference, or historical recordkeeping. In accordance with the ADA Title II Final Rule, the University Libraries provides accessible versions of archival materials upon request. To request an accommodation for this item, please submit an accessibility request form.