Effect of heteroatom exchange (S/Se) in the mesomorphism and physical properties of benzochalcogenodiazole-based liquid crystals
作者:Elias Regis、Leonardo de O. Aguiar、Patricia Tuzimoto、Edivandro Girotto、Tiago E. Frizon、Alexandre G. Dal Bó、Eduardo Zapp、Raphael Marra、Hugo Gallardo、André A. Vieira
DOI:10.1016/j.dyepig.2018.04.049
日期:2018.10
exchange of sulfur atom by selenium, a new series of fluorescent calamitic liquid crystals based on 4,7-disubstituted-2,1,3-benzoselenadiazole was successfully synthesized and characterized. The mesomorphic properties were studied by differential scanning calorimetry, polarized optical microscopy and X-ray diffraction. Thermal properties have evidenced the influence of changing sulfur by selenium atom
为了研究硒与硫原子交换对结构-性能关系的影响,成功合成并表征了一系列新的基于4,7-二取代-2,1,3-苯并硒基二唑的荧光cal族液晶。通过差示扫描量热法,偏振光学显微镜和X射线衍射研究了介晶性质。热性质已证明硒原子改变硫对液晶相的形成和同构范围的影响。光物理研究是在氯仿溶液中,其中这些化合物显示强的橙发光在UV光下,与相关的量子产率(Φ进行˚F = 0.14–0.16)和更大的溶剂变色依赖性。电化学研究表明,氧化和还原模式与2,1,3-苯并噻二唑类似物相似,但带隙较低。