Nanomaterials of Triazine-Based Dendrons: Convergent Synthesis and Their Physical Studies
摘要:
Without employing protection and deprotection processes, two series of triazine-based dendrons were efficiently prepared by a convergent method and fully characterized; their physical properties, including acidic, thermal, electrical, and optical stabilities were also studied.
and novel dendrimers Gn-N∼N-Gn (n = 2−4) based on triazine and piperazine units were efficiently prepared in good yields without employing the protection and deprotection processes and are fully characterized by 1H NMR and 13C NMR spectroscopies, elemental analysis, and mass spectroscopy. These compounds are transparent and possess good thermal stability. G4-Cl shows a monotropic columnar phase in a
triazine‐based dendrons (1 a–c) were successfully prepared in 70–83 % yields. These newly prepared dendrons are found to be liquid crystalline (LC). Computational investigations on molecular conformations and dipoles of triazine‐based dendrons reveal that the substituent on the central triazine unit interrupts strong dipole or H‐bond interactions to avoid dimeric formation. The obtained dendrons, not favouring
已成功制备了三种基于三嗪的树枝状分子(1 a – c),产率为70–83%。发现这些新制备的树突为液晶(LC)。对基于三嗪的树枝状分子的分子构象和偶极子的计算研究表明,中央三嗪单元上的取代基中断了强偶极子或H键相互作用,从而避免了二聚体的形成。所获得的树枝状分子不利于自组装成二聚体,但表现出LC行为,为这种方法提供了证据,该方法与通过二聚体或三聚体的形成(主要是通过氢键相互作用)诱导树枝状分子LC行为的常规方法相反。