Imine-based covalent organic framework as photocatalyst for visible-light-induced atom transfer radical polymerization,Journal of Polymer Science

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Imine-based covalent organic framework as photocatalyst for visible-light-induced atom transfer radical polymerization
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2021-07-14 , DOI: 10.1002/pol.20210261
Xiaoling Fu ₁ , Zhen Lu _{1,

2} , Hongjie Yang ₁ , Xiangyu Yin _{1,

2,

3} , Longqiang Xiao _{1,

2,

3} , Linxi Hou _{1,

2,

3}

Affiliation

Photoinduced atom transfer radical polymerization (ATRP) is an economical and environment-friendly method for synthesizing polymers with pre-designable structures and precise molecular weight. Although significant progress for copper-mediated photoinduced ATRP has been achieved, several drawbacks still remain, such as poor electron transfer capability and absorption bands of photocatalysts near UV region. Herein, imine-based covalent organic framework, TAPPy-TPA-COF, has been synthesized as potential heterogeneous photocatalyst for photoinduced ATRP. The “living” feature of polymerizations of methyl methacrylate (MMA) can be well controlled by efficiency maintain the balance between activation and inactivation of Cu^I and Cu^II. The chain extension experiments have further demonstrated the chain-end fidelity of polymers. Meanwhile, the catalyst recycle experiments have revealed stability of TAPPy-TPA-COF toward ATRP processes. These results support the feasibility of using COFs as heterogeneous photocatalysts for copper-mediated ATRP under visible light irradiation.

中文翻译：

亚胺基共价有机骨架作为可见光诱导原子转移自由基聚合的光催化剂

光诱导原子转移自由基聚合（ATRP）是一种经济且环保的合成具有可预先设计结构和精确分子量的聚合物的方法。尽管铜介导的光诱导 ATRP 已取得重大进展，但仍存在一些缺点，例如电子转移能力差和光催化剂在紫外区附近的吸收带。在此，基于亚胺的共价有机骨架TAPPy-TPA-COF已被合成为潜在的光诱导 ATRP 的多相光催化剂。甲基丙烯酸甲酯 (MMA) 聚合的“活性”特征可以通过保持 Cu ^I和 Cu ^{II 的}活化和失活平衡的效率来很好地控制. 扩链实验进一步证明了聚合物的链端保真度。同时，催化剂循环实验揭示了TAPPy-TPA-COF对 ATRP 过程的稳定性。这些结果支持在可见光照射下使用 COF 作为铜介导的 ATRP 的多相光催化剂的可行性。

更新日期：2021-09-15

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