Synthesis, thermal and optical properties of liquid crystalline terpolymers containing azobenzene and dye moieties
Synthesis, thermal and optical properties of liquid crystalline terpolymers containing azobenzene and dye moieties
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DOI：
10.1016/j.polymer.2005.07.040
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发表时间：
2005-10
期刊：
影响因子：
4.6
通讯作者：
R. Giménez;M. Millaruelo;M. Piñol;J. Serrano;A. Viñuales;R. Rosenhauer;T. Fischer;J. Stumpe
中科院分区：
文献类型：
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作者：
R. Giménez;M. Millaruelo;M. Piñol;J. Serrano;A. Viñuales;R. Rosenhauer;T. Fischer;J. Stumpe
介绍了新型偶氮聚合物的合成、热性能、光化学和光物理研究。这些聚合物含有三种不同类型的单体，每种单体主要负责一种特定功能：中间体苯并苯胺、光致变色偶氮苯和染料单元（苯并恶唑、蒽或苯乙烯衍生物）。这种方法提供了具有不同光谱性质的液晶三元聚合物，并具有通过辐照和热致自组织进行光定向的潜在能力。这些聚合物是由相应的甲基丙烯酸官能化单元的随机自由基聚合制备的。所有材料均表现出良好的热稳定性和液晶行为，表现为近晶A相或向列相中间相。溶液中聚合物的光学性质在吸光度光谱中显示出添加剂带，在单个染料单体的发射区显示出发光性质。然而，这些聚合物的薄膜不是发光的。为了评价聚合物的猝灭过程，对染料的吸收和氧化还原性能进行了研究。
The synthesis, thermal properties and photochemical and photophysical studies of new azopolymers are described. These polymers contain three different types of monomer, each of which is mainly responsible for a particular function: A mesogenic benzanilide, a photochromic azobenzene and a dye unit (a benzoxazole, an anthracene or a stilbene derivative). This approach provides liquid crystalline terpolymers with different spectral properties and with the potential ability to be photoaligned by irradiation and thermotropic self-organization. The polymers have been prepared by random radical polymerisation of the corresponding methacrylate-fucntionalised units. All of the materials show good thermal stability and liquid crystalline behaviour, displaying smectic A or nematic mesophases. Optical properties of the polymers in solution display additive bands in the absorbance spectrum and luminescent properties in the emission region of the individual dye monomers. However, films of these polymers are not luminescent. A study of the absorption and redox properties of the dyes has been performed in order to evaluate the quenching process in the polymers.