A novel family of organoborane complexes based on pyridyl-β-diketonate ligands has been synthesised, and their colorimetric and luminescence behaviour studied both in solution and in the solid state. The compounds behave as fluorescent materials, emitting a bluish light with high quantum yields of the order of 0.5–0.7. Although organoboranes usually show an aggregation-caused quenching effect in the solid state, the compounds described here maintain their emissive properties in the condensed state. Taking into account the ability of these emitters to act as dyes, several polymer thin films doped with these dyes have been fabricated. Interestingly, the new materials not only present fluorescence properties but also thermochromism and acidochromism. On the one hand, the increase of temperature causes the establishment of new intermolecular interactions between the boron (III) complexes and the polymer matrixes, which generate disturbances in the fluorecence emission. On the other hand, the protonation of the pyridyl nitrogen atom occurs in highly-acidic environments and causes a red-shift in the emission band that can be observed even with the naked eye. The application of these polymer materials as temperature and acid sensors is presented in this work.

合成了一个新的基于吡啶基-β-二酮酮酸酯配体的有机硼烷配合物家族，并在溶液和固态下研究了它们的比色和发光行为。这些化合物起荧光材料的作用，发出蓝光，量子产率高，约为0.5–0.7。尽管有机硼烷通常在固态下表现出聚集引起的猝灭作用，但此处所述的化合物在缩合状态下仍保持其发射性质。考虑到这些发射体充当染料的能力，已经制造了几种掺杂有这些染料的聚合物薄膜。有趣的是，新材料不仅具有荧光特性，还具有热致变色和酸致变色的特性。一方面，温度升高会导致硼（III）配合物与聚合物基体之间建立新的分子间相互作用，从而在荧光发射中产生干扰。另一方面，吡啶基氮原子的质子化发生在高酸性环境中，并导致发射带发生红移，即使用肉眼也可以观察到。这项工作介绍了这些聚合物材料作为温度和酸传感器的应用。