Precise electronic Χ(2) spectra of molecules adsorbed at an interface measured by multiplex sum frequency generation
Precise electronic Χ(2) spectra of molecules adsorbed at an interface measured by multiplex sum frequency generation
复制标题
DOI：
10.1021/jp045306x
复制
发表时间：
2004-12
影响因子：
3.3
通讯作者：
Shoichi Yamaguchi and;T. Tahara
中科院分区：
文献类型：
--
作者：
Shoichi Yamaguchi and;T. Tahara
我们发展了一种新的技术来获得吸附在界面上的分子的二阶非线性（χ（2））电子光谱。该技术基于利用飞秒近红外脉冲和白色连续光的多路和频产生。得出|χ（2）|图2空气/水界面处染料尼罗蓝（NB）的光谱，具有前所未有的高信噪比和密集的波长数据点。对光谱进行了χ（2）拟合分析，得到了NB在界面上的电子结构的详细信息。
We have developed a new technique to obtain a second-order nonlinear (χ(2)) electronic spectrum of molecules adsorbed at an interface. This technique is based on multiplex sum frequency generation that utilizes femtosecond near-infrared pulses and white light continuum. We obtained the |χ(2)|2 spectra of a dye Nile Blue (NB) at the air/water interface with an unprecedented high signal-to-noise ratio and dense wavelength data points. Fitting analyses with an exact χ(2) expression were performed for the spectra, and detailed information about the electronic structure of NB at the interface was obtained.