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首页> 外文期刊>Molecular Crystals and Liquid Crystals Science and Technology, Section A. Molecular Crystals and Liquid Crystals >Investigation of the Charge Complex Formation of Novel Silicon-Based Copolymers Containing Carbazole Unit by Time-Resoved Laser Spectroscopic Technique in the Electronic Excited State
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Investigation of the Charge Complex Formation of Novel Silicon-Based Copolymers Containing Carbazole Unit by Time-Resoved Laser Spectroscopic Technique in the Electronic Excited State

机译：时间激发激光光谱研究电子激发态新型含咔唑单元的硅基共聚物的电荷配合物形成

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摘要

SiPhPVK has unusual photophysical characterisitcs that are attributed to the formation of charge transfer complex in the excited state. The photoluminescence (PL) and excitation spectra for SiPhPVK at emission wavelengths of 440 and 520 nm were compared with those for SiHMPVK. Two excitation spectra of SiPhPVK monitored at two probes were observed different obviously. However, the excitation spectra of SiHMPVK obtained at two different probes showed the same spectral feature. In addition, upon photoexcitation with 300 nm, the PL life time of SiPhPVK became longer with increasing the probe wavelength. Expeimental data suggest that the electron transfer can occur from carbarzole to SiPh unit of SiPhPVK to generate the stabilized excited state. However, the PL decay profiles of SiHMPVK exhibited almost same at all probes with photoexcitation of 325 nm. Therefore, the PL emission of SiHMPVK at 325 mainly results from carbazole segments.
机译：SiPhPVK具有不寻常的光物理特性，这归因于激发态下电荷转移复合物的形成。将SiPhPVK在440和520 nm的发射波长下的光致发光（PL）和激发光谱与SiHMPVK进行了比较。观察到两个探针监测到的SiPhPVK的两个激发光谱明显不同。但是，在两个不同的探针上获得的SiHMPVK的激发光谱显示出相同的光谱特征。此外，在300 nm的光激发下，SiPhPVK的PL寿命随着探针波长的增加而变长。实验数据表明，电子可以从咔唑发生转移到SiPhPVK的SiPh单元，从而产生稳定的激发态。但是，SiHMPVK的PL衰减曲线在所有用325 nm光激发的探针上都表现出几乎相同的结果。因此，SiHMPVK在325处的PL发射主要来自咔唑链段。

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