Journal
NANOSCALE RESEARCH LETTERS
Volume 8, Issue -, Pages -Publisher
SPRINGER
DOI: 10.1186/1556-276X-8-406
Keywords
Organogel; Nanostructures; Self-assembly; Spacer effect; Imide derivative; Cholesteryl
Funding
- National Natural Science Foundation of China [21207112]
- Natural Science Foundation of Hebei Province [B2012203060, B2013203108]
- China Postdoctoral Science Foundation [2011M500540, 2012M510770, 2013T60265]
- Science Foundation for the Excellent Youth Scholars from Universities and Colleges of Hebei Province [Y2011113, YQ2013026]
- Scientific Research Foundation for Returned Overseas Chinese Scholars of Hebei Province [2011052]
- Open Foundation of State Key Laboratory of Solid Lubrication (Lanzhou Institute of Chemical Physics, CAS) [1002]
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In this paper, new bolaform cholesteryl imide derivatives with different spacers were designed and synthesized. Their gelation behaviors in 23 solvents were investigated, and some of them were found to be low molecular mass organic gelators. The experimental results indicated that these as-formed organogels can be regulated by changing the flexible/rigid segments in spacers and organic solvents. Suitable combination of flexible/rigid segments in molecular spacers in the present cholesteryl gelators is favorable for the gelation of organic solvents. Scanning electron microscopy and atomic force microscopy observations revealed that the gelator molecules self-assemble into different aggregates, from wrinkle and belt to fiber with the change of spacers and solvents. Spectral studies indicated that there existed different H-bond formations between imide groups and assembly modes, depending on the substituent spacers in molecular skeletons. The present work may give some insight into the design and character of new organogelators and soft materials with special molecular structures.
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