Abstract
Оrganic fluorescent liquids are π-conjugated luminophores with covalently attached bulky, flexible and low-melting side substituents. Functional molecular liquids are relatively new and class of materials, which have high processability owing to their fluidic nature and efficient fluorescence in pristine state. They are already finding application in photonics and optoelectronics. Recent studies of fluorescent liquids have shown their compatibility with polymer materials, exerting not only a plasticizing effect but also changing the optical properties of the resulting composite. However, the low glass transition temperatures of molecular liquids limit their compatibility with plastics. Therefore, the development of new functional liquid materials that are not only compatible with polymers, but also participate in polymerization, is an urgent task. In the course of this work, the series of novel liquid linear and branched luminophores containing phenylene, thiophene and benzothiadiazole units, emitting light in various ranges of the visible spectrum, were synthesized. To liquefy these olygomers the trihexylsilyl terminal substituent as most effective solubilizing group, which was identifying in our previous work . The high purity and specified structure of all the compounds obtained was proved by a complex of modern research methods. The influence of the nature, length, branching and type of π-conjugated core on the optical properties, rheology, phase behavior and thermal stability of luminophores has been studied. Some of the obtained oligomers were tested as scintillation detectors . Novel luminophores are well compatible with the polymer matrix. Based on some of these molecular liquids, liquid monomers have been obtained, the polymerization of which will make it possible to obtain new materials for optoelectronics and photonics. This work was supported by the Russian Science Foundation (grant № 25-73-00275).