Abstract A series of hemiphasmidic luminescent liquid crystalline polymers, in which the hemiphasmidic mesogen containing cyanostilbene were linked to the polymethacrylate main-chains via flexible spacers with different lengths, named poly {(Z)-m-(4-(1-cyano-2-(3,4,5-tris(octyloxy)phenyl)vinyl)phenoxy)alkyl methacrylate} (donated as Pr-m, m = 2, 4, 6, 8, 10) were synthesized via free radical polymerization. The phase structures and photophysical properties of Pr-m were investigated in detail by a combination of techniques including differential scanning calorimetry (DSC), polarizing optical microscopy (POM), small-angle X-ray scattering (SAXS), UV–Vis absorption spectra (UV–Vis spectra), photoluminescence spectra (PL spectra) and particle size analyzer. The results revealed that the phase structures of Pr-m transformed from hexagonal columnar phase (m = 2, 4) to smectic A phase (m = 6, 8, 10) with the increasing of flexible spacer length. All of the polymers featured similar AIEE properties, however, the solid state quantum yields of Pr-m decreased with the increasing flexible spacer length, and the solid quantum yields of Pr-m decreased from 8.55 (Pr-2) to 3.71 (Pr-10) with the increasing flexible spacer length.

中文翻译：

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柔性间隔长度对含氰基二苯乙烯的半透明液晶聚合物自组织行为和光物理性质的影响

摘要 一系列半半相发光液晶聚合物，其中含有氰基二苯乙烯的半半相液晶元通过不同长度的柔性间隔基与聚甲基丙烯酸酯主链相连，命名为poly {(Z)-m-(4-(1-cyano-2 -(3,4,5-三(辛氧基)苯基)乙烯基)苯氧基)甲基丙烯酸烷基酯}（作为Pr-m捐赠，m = 2, 4, 6, 8, 10）通过自由基聚合合成。通过差示扫描量热法 (DSC)、偏光显微镜 (POM)、小角 X 射线散射 (SAXS)、紫外-可见吸收光谱等技术的组合，对 Pr-m 的相结构和光物理性质进行了详细研究（UV-Vis 光谱）、光致发光光谱（PL 光谱）和粒度分析仪。结果表明，随着柔性垫片长度的增加，Pr-m的相结构从六方柱状相（m = 2, 4）转变为近晶A相（m = 6, 8, 10）。所有聚合物都具有相似的 AIEE 特性，然而，Pr-m 的固态量子产率随着柔性间隔物长度的增加而降低，Pr-m 的固态量子产率从 8.55 (Pr-2) 下降到 3.71 (Pr- 10) 随着柔性垫片长度的增加。