| Low molecular mass gels are one of the most important fields of supramolecularchemistry, which have been widely applied in biomedicine and environmental protection.In this thesis, a series of low molecular mass organogelators have been designed andsynthesized via N-(4-Aminobenzoyl)-L-glutamic acid diethyl ester. Their gelationproperties, microstructures, and formation mechanism were investigated.Firstly, nine glutamic acid imide derivatives with different substituted groups aredesigned and synthesized, which have been verified by IR, UV and NMR spectra methods.Thermal analysis shows that the thermal stability of glutamic acid derivatives is betterthan N-(4-Aminobenzoyl)-L-glutamic acid diethyl ester. In addition, the gel properties ofthese imide derivatives are measured. The experimental results indicate that thesemolecules with three alkyl chain substituted groups show strong gel ability, while otherimide molecules with aromatic groups or single alkyl chain substituted groups show no gelbehaviors. With the increment of chain length of three alkyl chain substituted groups, thesolvent of gel formation increase obviously from one, four to eleven, indicating theenlargement of gel ability. The results of IR spectra indicate intermolecular hydrogenbonding is the main driving force in the formation of gel. Other methods, such as SEM,AFM and XRD, indicate the imide compounds form stable organized nanostructures in theas-made gels. Furthermore, graphene and graphene oxide are doped in the gels to regulatethe gel behaviors. The IR results show the addition of graphene and graphene oxidedecrease the intermolecular hydrogen bonding in gel state. The SEM and XRDmeasurements indicate that the nanostructures change obviously after the doping. Thepresent research work may give useful exploration for the design, supramolecularassembly and functionalization of new gelator derivatives. At the same time, this workwould provide a new clue for the synthesis of ordered nanomaterials. |
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