Affiliation:
1. State Key Laboratory of Food Science and Resources School of Food Science and Technology Jiangnan University Wuxi Jiangsu 214122 P. R. China
2. Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province Jiangnan University Wuxi Jiangsu 214122 P. R. China
3. International Joint Laboratory on Food Safety Jiangnan University Wuxi Jiangsu 214122 P. R. China
4. School of Biological and Environmental Sciences Kwansei Gakuin University Sanda Hyogo 669–1330 Japan
Abstract
AbstractDynamic covalent organic frameworks (COFs) offer a promising platform for bioinspired soft actuators, yet transitioning their typical microcrystalline or single crystalline morphology to a flexible film suitable for wearable technology applications still remains a grand challenge. Herein, aiming at this issue, this work synthesizes an innovative class of hygrosensitive COF films, denoted as JNU‐hygroCOF, with superior mechanical strength, chemical stability and tunable thickness from nanometer to micrometer scales through solution‐processable sol‐gel method. These JNU‐hygroCOF films display exceptional moisture‐driven actuation capabilities through modulating the intramolecular hydrogen bonds, which act as specific locks that open and close the molecular rotor of N─N bond responding to guest molecules, within the unique azine‐pyridine molecular skeleton. By integrating these new JNU‐hygroCOF films into a portable respiratory monitoring system, a proactive and preventive solution for diagnosing and managing respiratory disorders such as sleep apnea and asthma has been provided.
Funder
National Natural Science Foundation of China