Study On Redox Response Of Supramolecular Gels And Self-Assembly Of Supramolecular Gels Under Strong Magnetic

Supramolecular gels are formed by self assemble of low molecular mass organicgelators (LMOGs) in organic solvents through non covalent bonds such as intermolecularhydrogen bonds, π πstacking, Van der Waals interactions, coordination, donor acceptorinteractions, hydrophilic and hydrophobic interactions and so on. External factors such aslight, heat, sound, electricity, magnetic fields and so on have very significant influence onthe self assemble process and structure of aggregates of supromolecular gels. In recentyears, it has become one of the hot research topics to prepare stimuli responsive gels bysynthesizing new gelators with functional groups.One supramolecular gelator DBC was synthesized. It was studied that the gelationproperties of DBC in several organic solvents and distilled water. A reversiblegel solution gel transformation was achieved by redox reactions. Meanwhile, the gelationand thermodynamic properties of DBS gel were investigated. The effect of the highmagnetic field on the self assemble mechanism and aggregates structure of DBS gel werestudied.This thesis are consisted of several sections as the following:1One supramolecular gelator DBC was synthesized. The gelation properties of DBC inseveral organic solvents and distilled water and thermal properties were investigated. Themicro stucture of DBC supramolecular gel was studied by using FE SEM.2The disulfide in DBC molecule is redox reversible. The reversible gel solution geltransformation of DBC hydrogels was achieved by oxidation and reduction reations. Thereduction reaction rate was preliminarily studied.3DBS supramolecular gels were prepared in a16T strong magnetic field. The influenceof strong magnetic field on the self assemble process and aggregates structure wereinvestigated by DSC and FE SEM.