| Title: | Reversible Color and Shape Changes of Nanostructured Fibers of a Macrocyclic pi-Extended Thiophene Hexamer Promoted by Adsorption and Desorption of Organic Vapor |
| Author(s): | Iyoda M; Takashika M; Hasegawa M; Otani H; Mizuno S; Miwa K; Kariya W; Fujiwara T; Shimizu H; Aoyagi S; |
| Address: | "Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan. Graduate School of Environment and Information Sciences, Yokohama National University, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan. School of Science, Kitasato University, Sagamihara, Kanagawa 252-0373, Japan. Department of Information and Basic Science, Nagoya City University, Nagoya 467-8501, Japan" |
| ISSN/ISBN: | 1520-5126 (Electronic) 0002-7863 (Linking) |
| Abstract: | "A phenyl-substituted macrocyclic pi-extended thiophene hexamer 1, composed of four thienylene-ethynylene and two thienylene-vinylene units, has a solid-state structure in which pi-pi, CH-pi, and van der Waals interactions occur. Slow addition of acetone to a solution of 1 in CS(2) produces a yellow nanostructured fiber 1-A containing a 1:1.5:1 ratio of 1, acetone, and CS(2). Over a 2 min period at 25 degrees C, 1-A gradually changes to an orange fiber 1-B containing a 1:0.5:1 ratio of 1, acetone, and CS(2). On exposure to acetone vapor, 1-B regenerates 1-A (vapochromism), and removal of all solvents from 1-A and 1-B generates a red-orange fiber 1-C, which upon brief immersion in acetone/CS(2) produces 1-A. Furthermore, 1-C is converted to orange yellow fiber 1-D upon exposure to acetone vapor for 1 s at 25 degrees C. Analysis of the horizontal and vertical profiles of the X-ray diffraction (XRD) patterns shows that removal of solvent from 1-A reversibly creates 1-B in conjunction with a shape and size change along with arching" |
| Keywords: | Acetone/*chemistry Adsorption Carbon Disulfide/*chemistry *Color Macrocyclic Compounds/*chemistry Nanostructures/*chemistry Particle Size Surface Properties Thiophenes/*chemistry Volatilization; |
| Notes: | "MedlineIyoda, Masahiko Takashika, Masataka Hasegawa, Masashi Otani, Hiroyuki Mizuno, Saori Miwa, Kazuhira Kariya, Wakana Fujiwara, Toshihiro Shimizu, Hideyuki Aoyagi, Shinobu eng Research Support, Non-U.S. Gov't 2020/07/23 J Am Chem Soc. 2020 Aug 12; 142(32):13662-13666. doi: 10.1021/jacs.0c05340. Epub 2020 Jul 27" |
