Time resolved fluorescence depolarization in a nematic liquid crystal
Time resolved fluorescence depolarization in a nematic liquid crystal
复制标题
向列液晶中的时间分辨荧光去偏振
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
C. Zannoni
中科院分区：
文献类型：
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作者：
A. Arcioni;F. Bertinelli;Riccardo Tarroni;C. Zannoni
报道了一种含时荧光退偏实验，首次对溶解在定向向列相液晶中的探针进行了全面的分析。我们研究了透明中间相混合物ZLI-1167在向列相和各向同性范围内的一系列温度下流行的染料全反式1，6-二苯基己三烯。测定了探针有序参数和垂直旋转扩散系数，以及液晶和各向同性相的荧光寿命τF。这一信息是应用先前提出的中间相旋转荧光去偏振理论(Zannoni，C.，1979，Molec)提取的。Phys，38,1813)，并介绍了前面提出的目标分析反卷积过程的全球变体(Arcioni，A.，和Zannoni，C.，1984，Chem.Pys.，88,113)。我们的结果证明了使用荧光去偏振作为一种有用的技术来研究排列的中间相的可能性。
A time dependent fluorescence depolarization experiment is reported and fully analysed for the first time for a probe dissolved in an aligned nematic liquid crystal. We have investigated the popular dye all trans 1,6 diphenyl hexatriene in the transparent mesophase mixture ZLI-1167 at a series of temperatures within the nematic and isotropic range. The probe order parameter and perpendicular rotational diffusion coefficient have been determined, together with the fluorescence lifetime τF in the liquid crystal and isotropic phase. This information is extracted applying a previously proposed theory for rotational fluorescence depolarization in a mesophase (Zannoni, C., 1979, Molec. Phys., 38, 1813) and introducing a global variant of the target analysis deconvolution procedure presented earlier (Arcioni, A., and Zannoni, C., 1984, Chem. Phys., 88, 113). Our results demonstrate the possibility of employing fluorescence depolarization as a useful technique for investigating aligned mesophases.