Application of Molecular Spins : from Nanomagnets to Biological Spin Systems

我们研究了具有化学稳定性、固相三维网络结构和强交换作用的杂环四氮杂环自由基的晶体结构和磁性。我们发现了各种功能性质，如TTTA的室温光致相变，BBDTA盐的高T铁磁有序，BDYTA盐的电荷转移相变，以及NT盐的非线性电子输运。此外，我们还揭示了具有Jahn-Teller失真特征的Mn12的磁结构相关性，并发展了各种金属和金属氧化物的球形空心磁体的化学合成。

We have examined the crystal structures and magnetic properties of heterocyclic thiazyl radicals which possessed chemical stabilities, 3D network structures in the solid states, and strong exchange interactions. We found various functional properties, such as a photo-induced phase transition at room temperature in TTTA, high-Tc ferromagnetic ordering in a BBDTA salt, charge-transfer phase transition in a BDYTA salt, and a non-linear electrical transport in a NT salt. Besides, we revealed magneto-structural correlation in Mn12 with a characteristic Jahn-Teller distortion, and developed chemical syntheses of spherical hollow magnets of various metals and metal oxides with a diameter of 500 nm.