Novel Tri-Cholesteryl Derivatives-Based Low Molecular Mass Organic Gelators with Multi-Stimuli Responsive Properties

作者：Xue, Min; Yu, Chunmeng; Wang, Gang; Yu, Hang; Fang, Yu^*

来源：Australian Journal of Chemistry, 2015, 68(5): 836-843.

DOI：10.1071/CH14437

• GEL-SOL TRANSITION
• WEIGHT GELATORS
• L-ISOLEUCINE
• L-VALINE
• SUPRAMOLECULAR HYDROGELS
• FLUORESCENT ORGANOGELS
• LOGIC GATES
• MULTISTIMULI
• GELATION
• FLUIDS

Two novel tri-cholesteryl derivatives 1 and 2 have been designed and prepared. Gelation tests in 30 liquids revealed that 1 is a more efficient gelator than 2. Interestingly, the gel of 1/cyclohexane shows a reversible sol-gel phase transition in response to a variety of disparate stimuli such as temperature, stress, and HCl gas. In particular, a fully reversible thixotropic property was observed, which has been rarely reported before. Fourier transform infrared spectroscopy and H-1 NMR measurements revealed that hydrogen bonding is an important driving force for the formation of the gel networks. The network structures of 1 and 2 in their cyclohexane gels were studied by scanning electron microscopy and X-ray diffraction analyses, and possible packing models were proposed accordingly. The findings demonstrated in the present work suggest that there is a big potential for developing tri-cholesteryl derivatives into extraordinary low molecular mass gelators.

• 出版日期2015
• 单位陕西师范大学