Luminescence and Configurations of Perylene Dimers in a Langmuir-Blodgett Film
Luminescence and Configurations of Perylene Dimers in a Langmuir-Blodgett Film
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Langmuir-Blodgett 薄膜中苝二聚体的发光和构型
DOI：
10.1021/j100058a029
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
B. Troesken
中科院分区：
文献类型：
--
作者：
J. Mahrt;F. Willig;W. Storck;D. Weiss;R. Kietzmann;K. Schwarzburg;B. Tufts;B. Troesken
在2K下测量了具有高浓度紧密堆积的苝发色团的LB膜的发光和激发光谱。它们与相应的光谱的二聚体α-二萘嵌苯晶体和形成在玻璃中的二萘嵌苯二聚体进行了比较。大多数的苝的发色团被逮捕的Langmuir-Blodgett膜的形式开放的亚稳态二聚体配置与单体的光谱。它们支配着发光的吸收光谱和激发光谱。从这些开放的二聚体的激发能量被迅速转移到较低的激发态的稳定的二聚体物种作为一个陷阱。该激发g态的发光导致发光光谱中550 nm处的峰
Luminescence and excitation spectra of a Langmuir-Blodgett multilayer with a high concentration of densely packed perylene chromophores are measured at 2 K. They are compared with corresponding spectra of the dimeric α-perylene crystal and of perylene dimers formed in a glass. The majority of the perylene chromophores are arrested in the Langmuir-Blodgett film in the form of open metastable dimer configurations with monomerlike spectra. They dominate the absorption spectrum and excitation spectrum of luminescence. From these open dimers the excitation energy is rapidly transferred to the lower excited state of a stable dimer species functioning as a trap. Luminescence from this excited g-state leads to the peak at 550 nm in the luminescence spectrum