Abstract：
New anti-octadecaborane(22) laser dyes have been recently introduced. However, their application in solid thin films is limited, despite being very desirable for electronics. Spectroscopic methods, photoluminescence (PL), and infrared reflection-absorption spectroscopy (IRRAS), are here used to reveal structural responses to a temperature change in thin polymer films made of π- and σ-conjugated and non-conjugated polymers and anti-octadecaborane(22) and its tetra-alkylatedderivatives. It has been observed that borane clusters are not firmly fixed within polymer matrices and that their ability for diffusion out of the polymer film is unprecedented, especially at higher temperatures. This ability is related to thermodynamic transitions of polymer macromolecular chains. PL and IRRAS spectra have revealed a clear correlation with β-transition and α-transition of polymers. The influence of structure and molecular weight of a polymer and the concentration and the substitution type of clusters on mobility of borane clusters within the polymer matrix is demonstrated. A solution is proposed that led to an improvement of the temperature stability of films by 45 °C. The well-known spectroscopic methods have proved to be powerful tools for a non-routine description of the temperature behavior of both borane clusters and polymer matrices.
摘要：
最近已经引入了新的抗十八硼烷(22)激光染料。然而,它们在固体薄膜中的应用有限，尽管是非常理想的电子产品。光谱法,光致发光(PL)，和红外反射吸收光谱（IRRAS），在这里用于揭示由π和σ共轭和非共轭聚合物以及反十八硼烷（22）及其四烷基化衍生物制成的聚合物薄膜对温度变化的结构响应。已经观察到,硼烷簇没有牢固地固定在聚合物基质内,并且它们扩散出聚合物膜的能力是前所未有的。尤其是在较高的温度下。这种能力与聚合物大分子链的热力学转变有关。PL和IRRAS光谱显示与聚合物的β-跃迁和α-跃迁有明显的相关性。证明了聚合物的结构和分子量以及团簇的浓度和取代类型对聚合物基质中硼烷团簇迁移率的影响。提出了一种解决方案，该解决方案使薄膜的温度稳定性提高了45°C。众所周知的光谱方法已被证明是用于对硼烷簇和聚合物基质的温度行为进行非常规描述的强大工具。
