Semiconductor Quantum Dots as Photocatalysts for Controlled Light-Mediated Radical Polymerization,ACS Macro Letters

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Semiconductor Quantum Dots as Photocatalysts for Controlled Light-Mediated Radical Polymerization
ACS Macro Letters ( IF 5.1 ) Pub Date : 2018-01-24 00:00:00 , DOI: 10.1021/acsmacrolett.7b00968
Yiming Huang ₁ , Yifan Zhu ₂ , Eilaf Egap ₂

Affiliation

Light-mediated radical polymerization has benefited from the rapid development of photoredox catalysts and offers many exceptional advantages over traditional thermal polymerizations. Nevertheless, the majority of the work relies on molecular photoredox catalysts or expensive transition metals. We exploited the capability of semiconductor quantum dots (QD) as a new type of catalyst for the radical polymerization that can harness natural sunlight. Polymerizations of (meth)acrylates, styrene, and construction of block copolymers were demonstrated, together with temporal control of the polymerization by the light source. Photoluminescence experiments revealed that the reduction of alkyl bromide initiator by photoexcited QD is the key to this light-mediated radical polymerization.

中文翻译：

半导体量子点作为光催化剂用于可控光介导的自由基聚合

光介导的自由基聚合受益于光氧化还原催化剂的快速发展，与传统的热聚合相比具有许多卓越的优势。然而，大部分工作依赖于分子光氧化还原催化剂或昂贵的过渡金属。我们利用半导体量子点（QD）的能力作为一种新型的自由基聚合催化剂，可以利用自然阳光。演示了 (甲基) 丙烯酸酯、苯乙烯的聚合和嵌段共聚物的构造，以及光源对聚合的时间控制。光致发光实验表明，光激发量子点还原烷基溴引发剂是这种光介导自由基聚合反应的关键。

更新日期：2018-01-24

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