文献类型：期刊文献

英文题名：Light-Powered Autonomous Flagella-Like Motion of Molecular Crystal Microwires

作者：Tong, Fei[1,5,6,7];Kitagawa, Daichi[4];Bushnak, Ibraheem[2,3];Al-Kaysi, Rabih O.[2,3];Bardeen, Christopher J.[1]

机构：[1]Univ Calif Riverside, Dept Chem, 501 Big Springs Rd, Riverside, CA 92521 USA;[2]King Saud bin Abdulaziz Univ Hlth Sci, Coll Sci & Hlth Profess, Riyadh 11426, Saudi Arabia;[3]Minist Natl Guard Hlth Affairs, King Abdullah Int Med Res Ctr, Nanomed, Riyadh 11426, Saudi Arabia;[4]Osaka City Univ, Grad Sch Engn, Dept Appl Chem, Sumiyoshi Ku, 3-3-138 Sugimoto, Osaka 5588585, Japan;[5]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[6]East China Univ Sci & Technol, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai 200237, Peoples R China;[7]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Mat & Dynam Chem, Inst Fine Chem,Sch Chem & Mol, Shanghai 200237, Peoples R China

年份：2021

卷号：60

期号：5

起止页码：2414

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20205209676235);WOS:【SCI-EXPANDED(收录号:WOS:000601070500001)】；

基金：This work was supported by the National Science Foundation grants DMR-1810514 (C.J.B.), the King Abdullah International Medical Research Center (KAIMRC) through grant RC10/104 (R.O.K.) and by the JSPS KAKENHI grant number JP16K17896 in Scientific Research for Young Scientists (B) (D.K.). The authors also acknowledge the technical support from Crystallography Lab from University of California, San Diego.

语种：英文

外文关键词：crystal growth; crystal engineering; flagella; isomerization; photochemistry

摘要：The ability to exhibit life-like oscillatory motion fueled by light represents a new capability for stimuli-responsive materials. Although this capability has been demonstrated in soft materials like polymers, it has never been observed in molecular crystals, which are not generally regarded as dynamic objects. In this work, it is shown that molecular crystalline microwires composed of (Z)-2-(3-(anthracen-9-yl)allylidene)malononitrile ((Z)-DVAM) can be continuously actuated when exposed to a combination of ultraviolet and visible light. The photo-induced motion mimics the oscillatory behavior of biological flagella and enables propagation of microwires across a surface and through liquids, with translational speeds up to 7 mu m s(-1). This is the first example of molecular crystals that show complex oscillatory behavior under continuous irradiation. A model that relates the rotation of the transition dipole moment between reversible E -> Z photoisomerization to the microscopic torque can qualitatively reproduce how the rotational frequency depends on light intensity and polarization.