Title

Two-Photon Absorption Properties of New Fluorene-Based Singlet Oxygen Photosensitizers

Authors

Authors

K. D. Belfield; M. V. Bondar; F. E. Hernandez; A. E. Masunov; I. A. Mikhailov; A. R. Morales; O. V. Przhonska;S. Yao

Comments

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Abbreviated Journal Title

J. Phys. Chem. C

Keywords

DENSITY-FUNCTIONAL THEORY; CONJUGATED PORPHYRIN DIMERS; BOND-LENGTH; ALTERNATION; CONSISTENT BASIS-SETS; CROSS-SECTIONS; PHOTODYNAMIC; THERAPY; ENERGY-TRANSFER; 3-LEVEL MODEL; ONE-PHOTON; CHROMOPHORES; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

Abstract

The degenerate two-photon absorption (2PA) spectra of several fluorene-based photosensitizers (PS) in solution were obtained over a broad spectral range (460-880 nm) by open aperture Z-scan and two-photon fluorescence methods under either picosecond or femtosecond excitation, respectively. A maximum 2PA cross section of ca. 300 GM was observed for the photosensitizers containing a benzothiazole substituent in the fluorenyl 7-position. The electronic structures and 2PA properties of these PS were analyzed using a time-dependent density functional theory method, resulting in reasonably good agreement between experimental and theoretical data.

Journal Title

Journal of Physical Chemistry C

Volume

113

Issue/Number

11

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

4706

Last Page

4711

WOS Identifier

WOS:000264111300068

ISSN

1932-7447

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