Atom Transfer Radical Polymerization Driven by Near-Infrared Light with Recyclable Upconversion Nanoparticles,Macromolecules

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Atom Transfer Radical Polymerization Driven by Near-Infrared Light with Recyclable Upconversion Nanoparticles
Macromolecules ( IF 5.1 ) Pub Date : 2020-06-03 , DOI: 10.1021/acs.macromol.0c00850
Wenjie Zhang _{1,

2} , Jianhao He _{1,

2} , Chunna Lv ₁ , Qianyi Wang ₁ , Xinchang Pang ₂ , Krzysztof Matyjaszewski ₃ , Xiangcheng Pan ₁

Affiliation

Near-infrared (NIR) photoinduced chemical processes are highly attractive for specific applications owing to the deep penetration of NIR into the nontransparent materials including biological and synthetic materials. Robust NIR photoinduced atom transfer radical polymerization (photoATRP) was achieved using upconversion nanoparticles (UCNPs) as an internal light converter to turn a 980 nm NIR light to the wavelength of UV/vislight. This NIR photoATRP was capable of polymerizing both hydrophobic and hydrophilic monomers at a low loading of ppm concentrations of the CuBr₂/tris(2-pyridylmethyl)amine catalyst under the irradiation of a 980 nm NIR light (4 W/cm²) and UCNPs with reusable performance, providing well-defined polymers with predetermined molecular weight, low dispersity, and excellent chain-end fidelity. The switching of light “on/off” showed an excellent temporal control of the polymerization. The NIR photoATRP exhibited excellent penetrations through several visible light-proof barriers using NIR light, and it may provide future directions of photopolymerization in nontransparent systems, especially biological systems containing photosensitive moieties.

中文翻译：

具有可回收上转换纳米粒子的近红外光驱动的原子转移自由基聚合

近红外（NIR）光诱导化学过程对特定应用具有高度吸引力，这是因为NIR深入渗透到非透明材料（包括生物和合成材料）中。使用上转换纳米粒子（UCNP）作为内部光转换器，将980 nm NIR光转换为UV / vislight波长，可以实现强大的NIR光诱导原子转移自由基聚合（photoATRP）。这种NIR photoATRP能够在980 nm NIR光（4 W / cm ²）的辐射下，以低浓度的ppm浓度的CuBr ₂ /三（2-吡啶基甲基）胺催化剂聚合疏水性和亲水性单体。）和具有可重复使用性能的UCNP，可提供具有预定分子量，低分散性和出色的链端保真度的定义明确的聚合物。光“开/关”的切换显示出对聚合的出色的时间控制。NIR photoATRP在使用NIR光的情况下可穿透多个可见光屏障，表现出出色的穿透性，它可以为非透明系统（尤其是包含光敏部分的生物系统）中的光聚合提供未来的方向。

更新日期：2020-06-23

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