Title
Optimization Of The Double Pump-Probe Technique: Decoupling The Triplet Yield And Cross Section
Abstract
The synthesis, linear photophysical properties, two-photon absorption (2PA), excited-state transient absorption, and gain spectroscopy of a new fluorene derivative tert-butyl 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 (∼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. © 2012 American Chemical Society.
Publication Date
5-24-2012
Publication Title
Journal of Physical Chemistry A
Volume
116
Issue
20
Number of Pages
4833-4841
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1021/jp301051u
Copyright Status
Unknown
Socpus ID
84861512868 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84861512868
STARS Citation
Peceli, Davorin; Webster, Scott; Fishman, Dmitry A.; Cirloganu, Claudiu M.; and Hu, Honghua, "Optimization Of The Double Pump-Probe Technique: Decoupling The Triplet Yield And Cross Section" (2012). Scopus Export 2010-2014. 5326.
https://stars.library.ucf.edu/scopus2010/5326