Low Molecular Weight Gelators with Hexagonal Order in Their Liquid-Crystal Phases and Gel States: 5-Cyano-2-(3,4,5-trialkoxybenzoylamino)tropones


  • The authors are indebted to T. Fukamachi and Y. Koga (NIKON INSTECH Co., LTD) for ESEM (Nikon ESEM-2700) imaging. This work is partially supported by a Grant-in-Aid for Scientific Research of Priority Area (No. 10 146 103) from the Ministry of Education, Science, Sports, and Culture of Japan.


5-Cyano-2-(3,4,5-trialkoxybenzoylamino)tropones form hexagonal structures in both liquid-crystalline and gel states. The Figure shows an environmental scanning electron microscopy image of octanol gels. Hydrogen bonding between the tropone carbonyl group and the NH group of troponoid amides plays an important role in flattening the molecules, allowing tighter packing structures and more stable columnar mesophases and gel states.