0000000001316723
AUTHOR
Jian Hui Ye
Semicarbazides as gel forming agents for common solvents and liquid crystals
This paper describes the synthesis of 14 new gelling agents with semicarbazide groups as H-bonding motifs and alkyl- and/or azobenzene side groups. They gel solvents like decaline, 1,2-dichlorobenzene and toluene and liquid crystalline mixtures. X-Ray structure analysis shows that the semicarbazides are connected by H-bonds, each molecule to four neighbours. As a result a ribbon is formed with a core of H-bonded semicarbazide groups and alkyl chains sticking to the side. IR measurements show an unchanged H-bonding motif in large crystals and in the gel fibres, even in LC-mixture. During heating the gel melts (rheology), while the H-bonding motif of the crystal disappears (IR and DSC measure…
CCDC 151383: Experimental Crystal Structure Determination
Related Article: P.Deindorfer, T.Geiger, D.Schollmeyer, Jian Hui Ye, R.Zentel|2006|J.Mater.Chem.|16|351|doi:10.1039/b510474b