Luminescent color tuning with polymer films composed of boron diiminate conjugated copolymers by changing the connection points to comonomers†,Polymer Chemistry

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Luminescent color tuning with polymer films composed of boron diiminate conjugated copolymers by changing the connection points to comonomers†
Polymer Chemistry ( IF 4.1 ) Pub Date : 2018-03-16 00:00:00 , DOI: 10.1039/c8py00283e
Madoka Yamaguchi _{1,

2,

3,

4,

5} , Shunichiro Ito _{1,

2,

3,

4,

5} , Amane Hirose _{1,

2,

3,

4,

5} , Kazuo Tanaka _{1,

2,

3,

4,

5} , Yoshiki Chujo _{1,

2,

3,

4,

5}

Affiliation

A series of alternating copolymers composed of boron diiminate were synthesized with variable connection points to the comonomer units. All polymers had aggregation-induced emission (AIE) properties, and their films presented diverse colors from green to orange depending on the type of comonomer such as fluorene and bithiophene and the connection points. From mechanistic studies, it was found that the charge transfer character was varied in the emission properties of the polymers. Theoretical investigation proposed that boron diiminate worked as a strong electron-acceptor in the excited state when the comonomers were connected to one or both the phenyl groups on the nitrogen atoms. In contrast, when the comonomers were linked at the phenyl groups on the carbon atoms in the boron-containing six-membered ring, a weak electron-donating property was induced. This is the first example, to the best of our knowledge, to tune the luminescence properties with AIE-active conjugated polymers without changing the chemical components.

中文翻译：

通过改变共聚单体的连接点，对由二硼化硼共轭共聚物组成的聚合物薄膜进行发光色调谐†

合成了一系列由二硼化硼组成的交替共聚物，其与共聚单体单元的连接点可变。所有聚合物均具有聚集诱导发射（AIE）特性，并且它们的膜呈现出从绿色到橙色的多种颜色，具体取决于共聚单体（例如芴和联噻吩）的类型以及连接点。从机理研究中发现，电荷转移特性在聚合物的发射性质方面是变化的。理论研究表明，当共聚单体与氮原子上的一个或两个苯基连接时，二硼化硼在激发态下起强电子受体的作用。相反，当共聚单体在含硼六元环的碳原子上的苯基处连接时，诱导了弱的供电子性。据我们所知，这是第一个通过AIE活性共轭聚合物调节发光特性而不改变化学成分的例子。

更新日期：2018-03-16

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