Vinsamlegast notið þetta auðkenni þegar þið vitnið til verksins eða tengið í það: http://hdl.handle.net/1946/27024
Supramolecular gels based on low molecular weight gelators (LMWGs) have witnessed a tremendous growth over last decade due to the emerging potential applications such as dynamic gels, biological applications using gels as cell growth media and also medium to control crystal growth, drug delivery etc. LMWGs are formed by the immobilisation of the solvent molecules in the 3-D network of the gelators via non-covalent interactions such as hydrogen bonding, van der Waals interactions, π−π stacking etc. The structure and properties of the supramolecular gels rely mostly on the geometry of the building blocks and spatial arrangement and nature of the intermolecular non-covalent interactions. The hydrogen bonding motif in gelator plays a crucial role in gel formation. In this BS project, urea motif have been chosen as hydrogen bonding motif since bis-urea motif is well known to form α-tapes, which gel to give a fibre surface. The urea groups in the molecule form strong non-covalent bonds (hydrogen bonds) creating long chains of molecules, which form fibrils that then form the 3D network of the gel. In this context, a series of bis-urea compounds based on amino acids were designed, synthesised and characterised by standard analytical methods. Gelation ability in various solvent and the gel strength have been analysed for all amino acid based compounds synthesised in this BS-project.