文献类型：期刊文献

英文题名：Rosin-Based Amphiphilic Aiegens with Visualized Solid-State Molecular Motion for Injectable and Thermostable Supramolecular Fluorescent Hydrogels

作者：Zhai, Zhaolan[1] Ye, Shengfeng[1,2,3] Zhang, Wenjing[1] Shang, Shibin[1] Huang, Lixin[1] Liu, He[1] Song, Zhanqian[1] Jiang, Jianxin[2]

第一作者：Zhai, Zhaolan

机构：[1] Institute of Chemical Industry of Forestry Products, Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Jiangsu Province, Nanjing, 210042, China; [2] College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China; [3] Co-Innovation Center of Efficient Processing, Utilization of Forest Resources, Nanjing Forestry University, Jiangsu Province, Nanjing, 210037, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240441539)

语种：英文

外文关键词：Musculoskeletal system - Nanoclay - Nanofibers - Photochromism - Self assembly

摘要：Supramolecular hydrogels with aggregation-induced emission (AIE) activity are attracting significant attention due to their unique properties and promising application potential. However, using nonplanar conjugated molecules to self-assemble into ordered nanostructures remains a substantial challenge. In this study, a series of amphiphilic maleopimaric acid-derived Schiff bases (MPASA-R, R=H, 4Cl, 5Cl, 5Br, 5-NO2) with AIE characteristics were easily synthesized from rosin. Changing the substituents significantly affected the molecular arrangement and the excited-state molecular motion, thereby altering the photophysical properties and photochromic behaviors of MPASA-R. Notably, MPASA-5Br in the solid state exhibited quick and obvious visualized photochromic behaviors and excellent fatigue resistance, making it an ideal material for encryption-decryption applications. Interestingly, the strong hydrophobic interactions and large geometrical restrictions of the rosin skeleton promoted MPASA-R to self-assemble into chiral nanofibers in alkaline conditions. AIE supramolecular hydrogels were further obtained, the fluorescence properties and mechanical strength of which could be regulated by changing substitutions or concentration. Furthermore, the obtained AIE supramolecular hydrogels exhibited excellent injectable ability and high temperature resistance, which could be shaped on demand and remain unchanged mechanical properties and intense fluorescence at 75 °C. The present work not only provides novel biobased encrypted materials but also proposes an effective strategy based on the strong aggregation of the rosin skeleton for preparing AIE supramolecular hydrogels. ? 2024, The Authors. All rights reserved.