Synthesis of dendritic, non-kekulé-, and nondisjoint-type triphenylmethanes terminated with galvinoxyl radicals

Eiji Fukuzaki, Naoki Takahashi, Shingo Imai, Hiroyuki Nishide*, Andrzej Rajca

*この研究の対応する著者

研究成果: Article査読

16 被引用数 (Scopus)

抄録

A series of triphenylmethanes terminated with (a) hydrogalvinoxyl(s), bis(4-tert-butylphenyl)-(4-hydrogalvinoxylphenyl)methoxymethane lad, tris(4-hydrogalvinoxylphenyl)methoxymethane 2ad, and tris{4-[bis(4- hydrogalvinoxylphenyl)methoxymethyl]phenyl}methoxymethane 3ad, were prepared and oxidized to the corresponding galvinoxyl radicals, 1af, 2af, and 3af, which have one, three, and six galvinoxyl radical(s), respectively. Chemical reduction of the galvinoxyl radicals with a Na/K alloy gave stable intermediates, i.e., the tetraanion, decaanion, and docosaanion. The tetraanion was oxidized with an equimolar amount of iodine at ca. 170 K to the galvinoxyl radical-combined triphenylmethyl radical 1cf. The ESR signal of the biradical at room temperature indicated an exchange interaction between the two radicals. The spectrum at 140 K had a zero-field splitting and ΔMs= ±2 transition signal at half-field, which are characteristic of a multiplet species.

本文言語English
ページ(範囲)284-293
ページ数10
ジャーナルPolymer Journal
37
4
DOI
出版ステータスPublished - 2005

ASJC Scopus subject areas

  • ポリマーおよびプラスチック
  • 材料化学

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