Photocleavage behavior of a polythiophene derivative containing a coumarin unit
Photocleavage behavior of a polythiophene derivative containing a coumarin unit
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DOI：
10.1038/s41428-021-00574-z
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发表时间：
2021-11-01
期刊：
影响因子：
2.8
通讯作者：
Kawamoto, Masuki
中科院分区：
文献类型：
--
作者：
Muralidhar, Jyorthana Rajappa;Kodama, Koichi;Kawamoto, Masuki
我们合成了侧链中含有可光裂解香豆素单元的聚噻吩衍生物。所得聚合物含有56%香豆素单元，数均分子量为17,000。当用313nm照射聚噻吩衍生物的膜时，54％的香豆素基团被光裂解。傅里叶变换红外光谱显示光裂解的侧链转化为羧基。羧基的形成改变了聚合物膜表面的性质，从疏水性变为亲水性。此外，香豆素单元的光裂解改变了聚合物在有机溶剂中的溶解度。利用这种溶解度的变化，我们使用光掩模对聚噻吩薄膜进行光图案化。此外，化学掺杂后光裂解的聚噻吩薄膜的电导率增加了10(4)倍。
We synthesized a polythiophene derivative containing a photocleavable coumarin unit in the side chain. The resulting polymer contained 56% coumarin units with a number-average molecular weight of 17,000. When a film of the polythiophene derivative was irradiated at 313 nm, 54% of the coumarin groups were photocleaved. Fourier transform infrared spectroscopy revealed that the photocleaved side chains were transformed to carboxyl groups. Formation of the carboxyl group changed the nature of the surface of the polymer film from hydrophobic to hydrophilic. Furthermore, photocleavage of the coumarin unit changed the solubility of the polymer in organic solvents. Taking advantage of this solubility change, we photopatterned the polythiophene film using a photomask. In addition, the photocleaved polythiophene film showed a 10(4)-fold increase in electrical conductivity after chemical doping.