Histidine, Derivatives Triphenylbenzene Cementitious Properties

A new series of Low molecular mass organic gelators (LMOG) with different long alkyl chains were synthesized and their gelation properties, morphologies as well as self-assembly behaviors in gel state were investigated systematically using scanning electron microscopy (SEM), FT-IR,'H NMR and X-ray diffraction (XRD). On basis of these studies, we concluded the mechanism of the formation of organogels.(1) syntheses, characterization, and gelation properties of derivatives of histidine in organic solventsWe designed and synthesised derivatives of histidine with different long alkyl chains and studied the gelation properties in a variety of organic solvents. The morphologies of the corresponding xerogels were investigated by SEM, which exhibited a smooth fibrous structure. FT-IR peak of carbonyl and amino moieties appear at similar spectral position in neat powders and in their gels, found that the dimerization of carboxylic acids and hydrogen bonding is the main driving force. Which is also proved by'H NMR. XRD result indicates that the moleculeassembles in an ordered structure. The thickness of the alkyl chains in the gelation state were determined by the calculation to the XRD results, which implied the molecular assembles were in ordereded aggregates with head-to-head packing. All results demonstrate that intra-and inter hydrogen bonds are driving forces in the process of the organogelation..(2) syntheses, characterization, and gelation properties of derivatives of triphenylbenzene in organic solventsWe designed and synthesized a series of triphenylbenzene derivatives, which consisting of triphenylbenzene as core and tuning the peripheral substituted alkoxy chains. It have a good gel properties in non-polar organic solvents. Gel-sol transition temperature (Tg) increased with increasing concentration of the gel concentration (C) and have a stable maximum. The morphologies of the corresponding xerogels were investigated by scanning electron microscopy (SEM), gel has a smooth fibrous, and lamellar. Small angle X-ray diffraction (XRD) indicates that the molecule assembles in an ordered structure. From the XRD and FT-IR results, By comparing FT-IR spectra of the gel and solid, UV-visible absorption spectroscopy of the gel and solution, demonstrating that hydrogen bonding andπ-πinteraction is the driving force of molecular self-assembly.