A Series of Fluorene-Based Two-Photon Absorbing Molecules: Synthesis, Linear and Nonlinear Characterization, and Bioimaging
作者:Carolina D. Andrade、Ciceron O. Yanez、Luis Rodriguez、Kevin D. Belfield
DOI:10.1021/jo1005075
日期:2010.6.18
The synthesis, structural, and photophysical characterization of a series of new fluorescent donor acceptor and acceptor-acceptor molecules, based on the fluorenyl ring system, with two-photon absorbing properties is described. These new compounds exhibited large Stokes shifts, high fluorescence quantum yields, and significantly, high two-photon absorption cross sections, making them well suited for two-photon fluorescence microscopy imaging. Confocal and two-photon fluorescence microscopy imaging of COS-7 and HCT 116 cells incubated with probe I showed endosomal selectivity, demonstrating the potential of this class of fluorescent probes in multiphoton fluorescence microscopy.
New Two-Photon-Absorbing Probe with Efficient Superfluorescent Properties
作者:Kevin D. Belfield、Carolina D. Andrade、Ciceron O. Yanez、Mykhailo V. Bondar、Florencio E. Hernandez、Olga V. Przhonska
DOI:10.1021/jp107343k
日期:2010.11.11
The synthesis, linear photophysical, and photochemical parameters, two-photon absorption (2PA), and superfluorescence properties of 2,2'-(5,5'-(9,9-didecyl-9H-fluorene-2,7-diyl)bis(ethyne-2,1-diyl)bis(thiophene-5,2-diy1))dibenzo[d]thiazole (1) were investigated, suggesting its potential as an efficient fluorescent probe for bioimaging applications. The steady-state absorption, fluorescence, and excitation anisotropy spectra of 1 were measured in several organic solvents and aqueous media. Probe 1 exhibited high fluorescence quantum yield (similar to 0.7-0.8) and photochemical stability (photobleaching quantum yield similar to(3-7) x 10(-6)). The 2PA spectra were determined over a broad spectral range (640-920 nm) using a standard two-photon induced fluorescence method under femtosecond excitation. A well-defined two-photon allowed absorption band at 680-720 nm with corresponding 2PA cross sections delta(2PA) approximate to 800-900 GM was observed. The use of probe 1 in bioimaging was shown via one- and two-photon fluorescence imaging of HCT-116 cells. An amplification of the stimulated emission of 1 was demonstrated in organic solvents and thin polystyrene films, which potentially can be used for the development of new fluorescent labels with increased spectral brightness.
Two-Photon Fluorescence Lysosomal Bioimaging with a Micelle-Encapsulated Fluorescent Probe
作者:Carolina D. Andrade、Ciceron O. Yanez、Maher A. Qaddoura、Xuhua Wang、Curtesa L. Arnett、Sabrina A. Coombs、Jin Yu、Rania Bassiouni、Mykhailo V. Bondar、Kevin D. Belfield
DOI:10.1007/s10895-010-0801-3
日期:2011.5
We report two-photon fluorescence microscopy (2PFM) imaging and in vitro cell viability of a new, efficient, lysosome-selective system based on a two-photon absorbing (2PA) fluorescent probe (I) encapsulated in Pluronic® F-127 micelles. Preparation of dye I was accomplished via microwave-assisted synthesis, resulting in improved yields and reduced reaction times. Photophysical characterization revealed notable 2PA efficiency of this probe.
我们报告了一种新型、高效、溶酶体选择性系统的双光子荧光显微镜(2PFM)成像和体外细胞存活率,该系统基于封装在 Pluronic® F-127 胶束中的双光子吸收(2PA)荧光探针(I)。染料 I 的制备是通过微波辅助合成完成的,从而提高了产量并缩短了反应时间。光物理特性分析表明,该探针具有显著的 2PA 效率。