Solution-processable conjugated polymers containing alternating 1-alkyl-1,2,4-triazole and NSN links
作者:Mingfeng Wang、Fred Wudl
DOI:10.1039/c0jm00254b
日期:——
Poly(sulfur nitride), [SN]x, is an infinite π-bonded system and only known polymeric superconductor composed of nonmetallic elements. The appealing electronic properties of [SN]x, along with the safety issue involved in the synthesis, have motivated research on [SN]x analogues, for example, conjugated polymers consisting of sulfur–nitrogen moieties separated by heterocyclic groups. In this paper, we report an exploration for a new NSN-linked polymer, with a major objective to improve its solubility for low-cost, large-area fabrication of molecular devices based on a solution process. Specifically, we present the synthesis and characterization of a conjugated polymer based on alternating 1-alkyl-1,2,4-triazole and sulfur–nitrogen. We found that 4-dimethylamino pyridine is an effective catalyst for the polymerization of bis-N-sulfinyl-3,5-diamino-1-dodecyl-1,2,4-triazole, resulting in polymers that show a broad absorption band in the range of 400 to 600 nm. Moreover, this polymer exhibits high solubility in a variety of non-polar solvents, including tetrahydrofuran, chloroform, dichloromethane, and chlorobenzene.
聚(氮化硫)[SN]x 是一种无限 π 键系统,也是唯一已知的由非金属元素组成的聚合物超导体。由于[SN]x 极具吸引力的电子特性,以及合成过程中涉及的安全问题,激发了对[SN]x 类似物的研究,例如由杂环基团分隔的硫氮分子组成的共轭聚合物。在本文中,我们报告了对一种新型 NSN 连接聚合物的探索,主要目的是提高其溶解性,以便在溶液工艺的基础上低成本、大面积地制造分子设备。具体来说,我们介绍了一种基于 1-烷基-1,2,4-三唑和硫-氮交替的共轭聚合物的合成和表征。我们发现,4-二甲基氨基吡啶是双-N-亚磺酰基-3,5-二氨基-1-十二烷基-1,2,4-三唑聚合反应的有效催化剂,从而产生了在 400 至 600 纳米范围内具有宽吸收带的聚合物。此外,这种聚合物在各种非极性溶剂(包括四氢呋喃、氯仿、二氯甲烷和氯苯)中具有很高的溶解度。