[17p-B409-1~17] 12.1 Fabrications and Structure Controls

[17p-B409-6] Enantio-separation using magnetic substrate of helical supramolecular assemblies composed of achiral Co(Ⅱ) phthalocyanine with PVD method

〇(D)Hiroki Aizawa^1,2, Takuro Sato^1,2, Koji Yonekura³, Saori Maki-Yonekura³, Tasuku Hamaguchi³, Kiyofumi Takaba³, Taketoshi Minato², Hiroshi Yamamoto^1,2 (1.SOKENDAI, 2.IMS, 3.RIKEN)

Keywords:Chiral-Induced-Spin-Selectivity, Physical Vapor Deposition, Helical supramolecular assemblies

Recently, Enantio-separation phenomena for racemic solution of amino acid on vertically magnetized Ni substrate in use of this effect has been discovered. This is based on CISS(Chiral-Induced-Spin-Selectivity) effect, which has been reported for various chiral materials. With CISS effect, one can polarize an electron spin during the electron transfer process in chiral materials. Nonetheless, so far, no one has applied this enantio-separation method for racemic mixture of helical nanofibers. Thus, we focus on the helical supramolecular assemblies composed of achiral Co(Ⅱ) phthalocyanine which was grown on a Si substrate with PVD (Physical Vaper Deposition) method. In this study, we succeeded in growing helices with a preferred handedness depending on the magnetization direction of vertically magnetized Ni substrates. The ratio between left-handed and right-handed helices switched about 11:9 to 9:11 by changing the direction of magnet field, which implies the presence of CISS effect.