An amino-modified benzothiadiazole polymer, its preparation method and application
By employing electrochemical oxidative polymerization, benzothiadiazole polymers modified with nitro and/or amino groups have solved the problems of photochemical stability and aggregation of fluorinated conjugated materials, achieving efficient and stable electrochromic properties suitable for electrochromic devices.
CN118206721BActive Publication Date: 2026-07-17WUYI UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUYI UNIV
- Filing Date
- 2024-03-07
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing fluorinated conjugated materials suffer from poor photochemical stability and severe aggregation in electrochromic applications. Furthermore, they have low fluorine exchange yields, complex preparation processes, and involve hazardous fluorinating reagents.
Method used
Benzothiadiazole polymers modified with nitro and/or amino groups are prepared by electrochemical oxidative polymerization using non-hazardous reagents to form a donor-acceptor-donor (DAD) structure, thereby adjusting the absorption spectrum and color of the polymer.
Benefits of technology
The prepared polymer has a lower bandwidth, a wider absorption range, a faster response time, higher optical transmittance, and better stability, making it suitable for electrochromic devices.
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Figure CN118206721B_ABST
Abstract
This invention discloses a nitro and / or amino-modified benzothiadiazole polymer and its preparation method and application, belonging to the field of polymer materials technology. The polymer provided by this invention has the following structural formula (I): (I); in formula (I), X1 and X2 are independently hydrogen, nitro, or amino, and X1 and X2 are not simultaneously hydrogen; Ar is an aromatic donor group; n is an integer from 1 to 10000. The polymer of this invention has a donor-acceptor-donor structure. Due to the strong electron-accepting ability of nitro and / or amino-modified benzothiadiazoles, it has a strong electron-withdrawing ability, thus enhancing the interaction between the donor and acceptor, improving the optical contrast and coloring efficiency of the polymer, and exhibiting a lower bandwidth and a wider absorption range, greatly expanding its application range, especially in the preparation of electrochromic devices.
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