Lead Halide Perovskite Nanocrystals as Photocatalysts for PET-RAFT Polymerization under Visible and Near-Infrared Irradiation,ACS Macro Letters

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Lead Halide Perovskite Nanocrystals as Photocatalysts for PET-RAFT Polymerization under Visible and Near-Infrared Irradiation
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-05-01 , DOI: 10.1021/acsmacrolett.0c00232
Yifan Zhu ₁ , Yifeng Liu ₁ , Kristen A Miller ₁ , Hanyu Zhu ₁ , Eilaf Egap _{1,

2}

Affiliation

A key challenge of harvesting solar energy for chemical transformations is the scarcity of photocatalysts with broad activation wavelength and easily tunable band structures. Here, we introduce lead halide perovskite (CsPbBr₃) nanocrystals as band-edge-tunable photocatalysts for efficient photoinduced electron/energy transfer–reversible addition–fragmentation chain transfer (PET-RAFT) polymerization. PET-RAFT polymerization of various functional monomers is successfully conducted using a broad range of irradiation sources ranging from blue to red light (460 to 635 nm), resulting in polymer products with narrow dispersity (Đ = 1.02–1.13) and high degree of chain-end fidelity. Furthermore, the giant two-photon absorption cross-section of CsPbBr₃ enables activation with a light source in the near-infrared region (laser pulses centered at 800 nm) for the PET-RAFT process.

中文翻译：

卤化铅钙钛矿纳米晶体作为可见光和近红外辐照下 PET-RAFT 聚合的光催化剂

收集太阳能用于化学转化的一个关键挑战是缺乏具有宽活化波长和易于调节能带结构的光催化剂。在这里，我们介绍了卤化铅钙钛矿 (CsPbBr ₃ ) 纳米晶体作为带边可调光催化剂，用于高效的光诱导电子/能量转移-可逆加成-断裂链转移 (PET-RAFT) 聚合。使用从蓝光到红光（460 到 635 nm）的宽范围辐照源成功地进行了各种功能单体的 PET-RAFT 聚合，得到具有窄分散性（Đ = 1.02-1.13）和高链度的聚合物产品-结束保真度。_{此外，CsPbBr 3}的巨大双光子吸收截面能够在 PET-RAFT 工艺中使用近红外区域的光源（中心为 800 nm 的激光脉冲）进行激活。

更新日期：2020-05-01

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