Photochemically and Thermally Driven Full‐Color Reflection in a Self‐Organized Helical Superstructure Enabled by a Halogen‐Bonded Chiral Molecular Switch
Abstract
Supramolecular approaches toward the fabrication of functional materials and systems have been an enabling endeavor. Recently, halogen bonding has been harnessed as a promising supramolecular tool. Herein we report the synthesis and characterization of a novel halogen‐bonded light‐driven axially chiral molecular switch. The photoactive halogen‐bonded chiral switch is able to induce a self‐organized, tunable helical superstructure, that is, cholesteric liquid crystal (CLC), when doped into an achiral liquid crystal (LC) host. The halogen‐bonded switch as a chiral dopant has a high helical twisting power (HTP) and shows a large change of its HTP upon photoisomerization. This light‐driven dynamic modulation enables reversible selective reflection color tuning across the entire visible spectrum. The chiral switch also displays a temperature‐dependent HTP change that enables thermally driven red, green, and blue (RGB) reflection colors in the self‐organized helical superstructure.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 09, 2018
- Source ID
- 10.1002/anie.201712781
Entities
People
- Augustine M. Urbas
- Hao Wang
- Hari Krishna Bisoyi
- Ling Wang
- Quan Li
- Timothy J. Bunning
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory
- Kent State University