1333245-13-8Relevant articles and documents
Construction of two- or three-component low molecular weight gel systems
Yamanaka, Masamichi,Aoyama, Ryohei
, p. 1127 - 1131 (2010)
Pyridyl group-bound tris-urea 2, whose structure issimilar to the tris-urea low molecular weight gelator (LMWG) 1, was synthesized. Addition of a trace amount of 2 and Pd(OAc)2 to 1 resulted in a reduction in the critical gelation concentration (CGC) in acetone. Metal-ligand interaction between Pd(OAc)2 and the pyridyl group of 2 assist the gelation. Assistance by intermolecular hydrogen bonding was also effective for gelation of acetone. An acetone gel of 1 was formed at half the value of the CGC of 1 alone by adding a trace amount of 2 and isophthalicacid. Scanning electron microscopy (SEM) measurements of these aggregates showed structural alterations caused by the additive. A mixture of 1 and a trace amount of 2 in EtOAc gave a gel. Addition of 2 was essential to form the gel, because 1 alone did not gel EtOAc. SEM measurements indicated that 2 produced extension of the fibrous aggregates.