Organogels from different self-assembling novel L-proline dihydrazide derivatives: gelation mechanism and morphology investigations

A new set of organogelator, l-proline dihydrazide derivatives (designated as Cbz-Pro-AkHz) were synthesized, purified and characterized based on different spectral techniques, such as NMR, FTIR and HPLC-MS analyses. The gelation properties were investigated in oils and various organic solvents. The gel-sol temperature (T (GS)) was decided by the function of gelator concentration, and the corresponding enthalpies (Delta H (g)) were extracted. FT-IR spectroscopy studies revealed that the main driving force for the formation of aggregated structure was the hydrogen bonding and van der Waals interaction. Thus, all the xerogels obtained were analyzed using SEM and powder XRD, which revealed different supramolecular network structures in different gels. Possible models have been inferred from XRD for the different molecular packing arrangements within the fibrillar gel networks of the organogels.