3 years ago

Ferrocene-Based Hyperbranched Polytriazoles: Synthesis by Click Polymerization and Application as Precursors to Nanostructured Magnetoceramics

Ferrocene-Based Hyperbranched Polytriazoles: Synthesis by Click Polymerization and Application as Precursors to Nanostructured Magnetoceramics
Wei Yuan, Hongkun Li, Ben Zhong Tang, Yongfang Li, Yajing Liu, Yaowen Li, Weiwen Chi
Ferrocene-based polymers have drawn much attention in the past decades due to their unique properties and promising applications. However, the synthesis of hyperbranched polymers is still a great challenge. Here, two ferrocene-based hyperbranched polytriazoles with high molecular weights are facilely prepared by the click polymerization reactions of ferrocene-containing diazides (1) and tris(4-ethynylphenyl)amine (2) using Cu(PPh3)3Br as catalyst in dimethylformamide at 60 °C for 5 and 9 h in satisfactory yields of 54.0% and 52.3%. The resulting polytriazoles are soluble in common organic solvents and thermally stable, with 5% weight loss temperatures up to 307 °C. They can be used as precursors to produce nanostructured ceramics with good magnetizability by pyrolysis at elevated temperature. Soluble ferrocene-based hyperbranched polytriazoles are readily synthesized by the Cu(I)-catalyzed click polymerizations between tris(4-ethynylphenyl)amine and ferrocene-containing diazides in dimethylformamide at 60 °C for 5 and 9 h in good yields. Pyrolysis of the polymers at high temperature yields nanostructured ceramics with high magnetizabilities.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/marc.201700075

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