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不同维度共轭拓展有机光电基元对于丰富其在材料设计中的应用方式及了解其结构性能关系有着十分重要的意义.基于苯并二噻吩对称且规整的π共轭平面结构,以噻吩与苯并噻二唑组合而成的给受体共轭侧臂,分别沿其2,6位(横向)、4,8位(竖向)或两方向都(十字交叉)拓展其共轭体系,设计合成了三个化合物.研究表明,相比竖向连接,横向共轭修饰更有利于获得红移的光谱吸收性质、较窄的带隙和更规整的晶态结构,但是其最高已占轨道(HOMO)能级较高.而十字交叉型化合物,则同时拥有较宽广的光吸收谱图和较强的光吸收强度,最终有利于其电池器件获得较大的闭路电流.
Conjugation of organic optoelectronic elements with different dimensions is of great significance for enriching its application in material design and understanding its structural properties.According to the symmetric and regular π-conjugated planar structure of benzodithiophene, And thiadiazoles combined to give the receptor conjugated side arm, respectively, along its 2,6 (horizontal), 4,8 (vertical) or both directions are (cross) to expand its conjugate system design Three compounds have been synthesized.The results show that the lateral conjugate modification is more conducive to obtaining the spectral absorption properties of redshift, narrower bandgap and more regular crystalline structure than the vertical connection, but the highest occupied orbital HOMO), while the cross-shaped compounds have a wide range of optical absorption spectra and strong light absorption intensity, which ultimately benefits their battery devices to obtain larger closed-circuit currents.