Chiral Silica with Preferred-Handed Helical Structure via Chiral Transfer

Kei Manabe; Sung-Yu Tsai; Satoshi Kuretani; Satoshi Kometani; Katsuyuki Ando; Yoshihiro Agata; Noboru Ohta; Yeo-Wan Chiang; I-Ming Lin; Syuji Fujii; Yoshinobu Nakamura; Yu-Ning Chang; Yuta Nabae; Teruaki Hayakawa; Chien-Lung Wang; Ming-Chia Li; Tomoyasu Hirai

doi:10.1021/jacsau.1c00098

Chiral Silica with Preferred-Handed Helical Structure via Chiral Transfer

JACS Au. 2021 Apr 1;1(4):375-379. doi: 10.1021/jacsau.1c00098. eCollection 2021 Apr 26.

Authors

Kei Manabe¹, Sung-Yu Tsai², Satoshi Kuretani¹, Satoshi Kometani¹, Katsuyuki Ando¹, Yoshihiro Agata³, Noboru Ohta⁴, Yeo-Wan Chiang⁵, I-Ming Lin⁵, Syuji Fujii¹, Yoshinobu Nakamura¹, Yu-Ning Chang⁶, Yuta Nabae³, Teruaki Hayakawa³, Chien-Lung Wang², Ming-Chia Li^{6

7}, Tomoyasu Hirai¹

Affiliations

¹ Department of Applied Chemistry, Faculty of Engineering and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan.
² Department of Applied Chemistry, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan.
³ Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1-S8-36 Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
⁴ Japan Synchrotron Radiation Research Institute, SPring-8, Sayo, Hyogo 679-5198, Japan.
⁵ Department of Materials and Optoelectronic Science, Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.
⁶ Department of Biological Science and Technology, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan.
⁷ Department of Biological Science and Technology, Center For Intelligent Drug Systems and Smart Bio-devices (IDS2B), National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.

Abstract

A strategy to obtain chiral silica using an achiral stereoregular polymer with polyhedral oligomeric silsesquioxane (POSS) side chains is described herein. The preferred helical conformation of the POSS-containing polymer could be achieved by mixing isotactic polymethacrylate-functionalized POSS (it-PMAPOSS) and a chiral dopant. The array structure of POSS molecules, which are placed along the helical conformation, is memorized even after removing the chiral dopant at high temperatures, leading to a chiral silica compound with exclusive optical activity after calcination.