文献类型：期刊文献

英文题名：CO2-Responsive Rosin-Based Supramolecular Hydrogels: Diverse Chiral Nanostructures and Their Application in In Situ Synthesis of Chiral Gold Nanoparticles

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

第一作者：Ye, Shengfeng

机构：[1] Chinese Academy of Forestry, Key Laboratory of Biomass Energy and Material, National Forestry and Grassland Administration, National Engineering Laboratory for Biomass Chemical Utilization, Institute of Chemical Industry of Forestry Products, 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 and Utilization of Forest Resources, Nanjing Forestry University, Jiangsu Province, Nanjing, 210037, China

年份：2023

外文期刊名：Langmuir

收录：EI(收录号：20240215335369);Scopus(收录号：2-s2.0-85181574364)

语种：英文

外文关键词：Carbon dioxide - Differential scanning calorimetry - Fiber optic sensors - Forestry - Fourier transform infrared spectroscopy - High resolution transmission electron microscopy - Hydrogels - Metal nanoparticles - Nanofibers - Rheology - Scanning electron microscopy - Supramolecular chemistry - Synthesis (chemical)

摘要：Natural small molecules have demonstrated tremendous potential for the construction of supramolecular chiral nanostructures owing to their unique molecular structures and chirality. In this study, novel CO2-responsive supramolecular hydrogels were constructed using a series of rosin-based surfactants (CnMPAN, n = 10, 12, and 14). The macroscopic properties, rheological properties, nanostructures, and intermolecular interactions of the hydrogels were investigated using differential scanning calorimetry, rotational rheometry, cryogenic transmission electron microscopy, and Fourier transform infrared spectroscopy. Interestingly, diverse nanostructures containing helical nanofibers, interwoven nanofibers, and twisted nanoribbons were formed in the hydrogels, which were rarely observed in reported supramolecular hydrogels, and the strength of the hydrogels was significantly enhanced by increasing the CnMPAN concentration and the alkyl chain length. The obtained hydrogels exhibited excellent CO2-responsiveness, with no obvious variation in the nanostructures and rheological properties after response to CO2/N2 for five cycles. Taking advantage of the chiral nanostructures of hydrogels, gold nanoparticles (GNPs) were further prepared. The average particle sizes of the resulting GNPs were as low as 2.5 nm, and the GNPs also had a chiral structure. It is worth noting that no additional reductants and UV-light irradiation were used during the reduction process of GNPs. This study emphasizes that the unique molecular structure and chirality of rosin are critical for the preparation of hydrogels with chiral nanostructures. In addition, this study enriches the applications of forest resources. ? 2023 American Chemical Society.