香豆酰溴作为单分子光引发剂在可见光和近红外光照射下合成共轭聚合物

IF 3 4区化学 Q3 CHEMISTRY, PHYSICAL ChemPhotoChem Pub Date : 2024-08-14 DOI:10.1002/cptc.202400196

Mengdi Wan, Prof. Xiaoxuan Liu, Prof. Yusuf Yagci, Prof. Zhiquan Li

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引用次数: 0

摘要

研究人员开发了两种香豆酰溴化物，即 3-(溴乙酰基)香豆素（BAC）和 3-(溴乙酰基)-7-甲氧基香豆素（BACO），用于在可见光和近红外光照射下对 N-乙基咔唑进行光聚合，从而构建共轭聚合物。由于 BAC 具有最佳的吸收特性和电子转移效率，其光引发性能优于传统的苯酰溴光引发剂。对所获得的聚 N-乙基咔唑进行了全面表征，证明成功合成了一种具有理想特性的共轭聚合物。掺杂导致了光学特性和薄膜形态的改善。利用瞬态吸收光谱阐明了聚合机理，揭示了电子从激发的光引发剂向 N-乙基咔唑的高效转移。

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Coumarinacyl Bromides as Unimolecular Photoinitiators for Conjugated Polymer Synthesis under Visible and NIR Light Irradiation

Two coumarinacyl bromides, 3-(bromoacetyl)coumarin (BAC) and 3-(bromoacetyl)-7-methoxycoumarin (BACO), were developed for the photopolymerization of N-ethylcarbazole to construct conjugated polymer under visible and near-infrared light irradiation. BAC outperformed the conventional phenacyl bromide photoinitiator, exhibiting superior photoinitiation performance due to its optimal absorption characteristics and electron transfer efficiency. The obtained poly(N-ethylcarbazole) was thoroughly characterized, demonstrating the successful synthesis of a conjugated polymer with desired properties. Dedoping led to improved optical properties and film morphology. The polymerization mechanism was elucidated using transient absorption spectroscopy, revealing efficient electron transfer from the excited photoinitiators to N-ethylcarbazole.

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来源期刊

ChemPhotoChem Chemistry-Physical and Theoretical Chemistry

CiteScore

5.80

自引率

5.40%

发文量

165

期刊介绍： Light plays a crucial role in natural processes and leads to exciting phenomena in molecules and materials. ChemPhotoChem welcomes exceptional international research in the entire scope of pure and applied photochemistry, photobiology, and photophysics. Our thorough editorial practices aid us in publishing authoritative research fast. We support the photochemistry community to be a leading light in science. We understand the huge pressures the scientific community is facing every day and we want to support you. Chemistry Europe is an association of 16 chemical societies from 15 European countries. Run by chemists, for chemists—we evaluate, publish, disseminate, and amplify the scientific excellence of chemistry researchers from around the globe.