Abstract
Two compounds containing carbazole and sulfone groups with different alkyl chain lengths have been designed and synthesized. The sulfone group has strong absorption characteristics and the alkoxy chain and carbazole group are electron-rich, forming D-δ-A-type symmetrical molecules. The molecules have the characteristics of charge transfer and high thermal stability, and the molecules stack to form a layered staggered stack, reducing the intermolecular π-π interactions. The target compounds also exhibit strong ultraviolet-fluorescent emission in the solid state at room temperature, and they are expected to be good luminescent materials.
Highlights
Carbazole has a stable planar conjugated rigid structure, the structure of nitrogen atoms in the soliton is a fused ring structure of the compound, while the carbazole group is a group with excellent photoelectric properties
We found that the target compounds possess a special W-shaped structure, which weakens the π–π stacking
Carbazole was purchased from the Tianjin Guangfu Fine Chemical Research Institute (AR)
Summary
Carbazole has a stable planar conjugated rigid structure, the structure of nitrogen atoms in the soliton is a fused ring structure of the compound, while the carbazole group is a group with excellent photoelectric properties. It is good thermal stability, and a multi-site chemical reaction. The sulfone structure has a strong electron-withdrawing effect, which contains both carbazole and sulfone structure, and contains less flexible alkyl chain groups. This non-planar, non-highly conjugated compound is less studied. Carbazole derivatives are a class of strong blue light emission, high Tg temperature and thermal stability effects of the compound, making them attractive OLED design candidates
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