A visible-light responsive zirconium metal-organic framework for living photopolymerization of methacrylates

作者：Xing, Hongzhu^*; Chen, Dashu; Li, Xingyu; Liu, Yue; Wang, Chungang; Su, Zhongmin^*

来源：RSC Advances, 2016, 6(71): 66444-66450.

DOI：10.1039/c6ra12134a

• TRANSFER RADICAL POLYMERIZATION
• AQUEOUS RAFT POLYMERIZATION
• CO2 REDUCTION
• CATALYST
• ATRP
• PHOTOCATALYSIS
• MONOMERS
• COPOLYMERS
• MOF
• PPM

Visible-light-induced controlled/living radical polymerization (C/LRP) mediated by photoactive zirconium metal-organic framework (Zr-MOF) NNU-28 has been explored. The photopolymerization is carried out at room temperature under 520 nm monochromatic light. The results show that anthracene-based NNU-28 is a promising heterogeneous sensitizer to initiate the photopolymerization where the robust Zr-MOF exhibits enhanced visible light absorption and characteristics of photoinduced charge generation. The NNU-28 mediated CRP relies on the in situ photoreduction of a Cu(II) complex deactivator to Cu(I) complex activator through an electron transfer process. The photopolymerization of methacrylates shows typical characteristics of controlled radical polymerization, where the as-prepared polymers have controlled molecular weights, narrow molecular weight distribution and high retention of chain-end groups. Besides, the NNU-28 mediated photopolymerization can be temporally and spatially controlled by light. The visible-light-induced polymerization investigated here suggests the promising application of photoactive MOFs for well-designed polymer synthesis.

• 出版日期2016
• 单位东北师范大学