著者

岩村秀太郎 著

出版者

女学社[ほか]

巻号頁・発行日

1916

著者

岩村 秀

出版者

東京大学理学部

雑誌

東京大学理学部弘報

巻号頁・発行日

vol.22, no.3, pp.4-5, 1990-12

著者

岩村 秀

出版者

The Society of Synthetic Organic Chemistry, Japan

雑誌

有機合成化学協会誌 (ISSN:00379980)

巻号頁・発行日

vol.52, no.4, pp.295-307, 1994-04-01 (Released:2009-11-16)

参考文献数

35

被引用文献数

1 2

---

There are two approaches toward the establishment of macroscopic spins for organic molecules. One is the exploration of persistent free radicals (S=1/2) that will have ferromagnetic interradical exchange coupling in crystalline states. While this approach has led to the discovery of well characterized organic ferromagnets, their Curie temperatures (Tc) are limited to sub-liquid-helium temperatures. Alternatively, design and synthesis of super-high-spin (S>>1/ 2) organic molecules have been studied. In principle, parallel alignment of two spins can become favored in non-Kekulé systems. One of the highlights of the oligomers and polymers obtained by repeating such units is the synthesis and characterization of a strongly paramagnetic nonacarbene (S=9). The two-dimensional network alignment of spins has been demonstrated to be most promising as high Tc molecular ferromagnets. Some non-Kekulé molecules were found by EPR spectroscopy and magnetic susceptibility/magnetization measurements to violate Hund's rule, thereby being disqualified as the units for super-high-spin polymers.

著者

岩村 秀

出版者

化学史学会

雑誌

化学史研究 (ISSN:03869512)

巻号頁・発行日

vol.41, no.3, pp.131-135, 2014