Toro Carlos, De Boni Leonardo, Yao Sheng, Belfield Kevin D, Hernández Florencio E
Department of Chemistry, University of Central Florida, Orlando, FL 32816, USA.
J Phys Chem B. 2008 Oct 2;112(39):12185-90. doi: 10.1021/jp804975a. Epub 2008 Sep 4.
In this article, we present a new and simple, yet efficient, two-step approach to synthesize 4,4'-bis(dibutylaminostyrylstyryl)-2,2'-bipyridine with high yield, as well as its linear and nonlinear optical characterizations in THF and toluene solutions. We show that its one- and two-photon absorption spectra are similar in both solvents. Nevertheless, the relaxation processes of this compound exhibit dependence on the solvent polarity. The one- and two-photon induced fluorescence signal of this molecule in solution reveals that its excited state is highly stabilized in THF solution rather than in toluene. Analysis of the fluorescence quantum yield, lifetime, and radiative and nonradiative decay rates are in agreement with Lippert's model for solute-solvent interactions. The optical measurements demonstrate that this dye is a promising candidate for multiphoton fluorescence imaging, optical limiting, and dye lasers.
在本文中，我们提出了一种新颖、简单且高效的两步法来高产率合成4,4'-双（二丁基氨基苯乙烯基苯乙烯基）-2,2'-联吡啶，以及在四氢呋喃（THF）和甲苯溶液中的线性和非线性光学特性。我们表明，其单光子和双光子吸收光谱在两种溶剂中相似。然而，该化合物的弛豫过程表现出对溶剂极性的依赖性。该分子在溶液中的单光子和双光子诱导荧光信号表明，其激发态在THF溶液中比在甲苯中高度稳定。对荧光量子产率、寿命以及辐射和非辐射衰减率的分析与溶质-溶剂相互作用的Lippert模型一致。光学测量表明，这种染料是多光子荧光成像、光学限幅和染料激光器的有前途的候选者。
