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Journal of Flow Chemistry
Authors: Aiichiro Nagaki, Kana Akahori, Yusuke Takahashi and Jun-ichi Yoshida

Living anionic polymerization of perfluoroalkyl methacrylates initiated by 1,1-diphenylhexyllithium was conducted without adding lithium chloride in an integrated flow microreactor system. The high degree of polydispersity index (PID) control was achieved at 0 °C (2-(nonafluorobutyl)ethyl and 2-(tridecafluorohexyl)ethyl methacrylates) or −40 °C (2,2,2-trifluoroethyl methacrylate). The subsequent reaction of a reactive polymer chain end with alkyl methacrylates or tert-butyl acrylate led to the formation of fluorine-containing block copolymers with narrow PDI.

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Journal of Thermal Analysis and Calorimetry
Authors: Hong-Ling Li, Koichi Takahashi, Yusuke Ujihira, Mariko Ishiwatari, Kurima Kobayashi, Takahiko Iriyama and Tokuzo Konishi

Abstract  

The Mössbauer spectra of Sm2Fe17Nx, prepared by the nitrogenation of Sm2Fe17 powders in an ammonia and hydrogen atmosphere, were observed at elevated temperatures to shed light on the thermal behavior of nitrogen in the compounds Sm2Fe17Nx. It was found that there were large differences in thermal behavior between the starting Sm2Fe17, crystalline Sm2Fe17Nx (x≈1.7) and amorphous Sm2Fe17Nx(x∼7). The thermal decomposition behavior of Sm2Fe17N3.2, developed as one of the most promising hard magnetic materials, was found to be different under different atmospheres.

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Journal of Flow Chemistry
Authors: Aiichiro Nagaki, Yusuke Takahashi, Shigeyuki Yamada, Chika Matsuo, Suguru Haraki, Yuya Moriwaki, Songhee Kim and Jun-ichi Yoshida

Abstract

Vinyllithiums were effectively generated by bromine–lithium exchange reaction of vinyl bromides with one eq of s-BuLi in a flow microreactor system at 0 °C or 20 °C, although two eq of t-BuLi and much lower temperatures are required for a conventional macro batch reaction. Subsequent reactions with various electrophiles in the flow microreactor system gave the corresponding vinyl compounds in good yields.

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