1. State Key Laboratory for Supramolecular Structure and Materials,Jilin University,Changchun 130012,China 2. College of Chemistry,Jilin University,Changchun 130012,China 3. Department of Analytical Biochemistry,Institute of Frontier Medical Sciences,Jilin University,Changchun 130012,China
Abstract：A new type of liquid crystalline was formed through self-assembly via intermolecular hydrogen bonding between the carboxylic acid and the pyridyl group of the stilbazoles. Cholesteryl butane diacid single ester (CSA) was synthesized for use as H-bond donor and the stilbazole derivatives (NCn) were prepared as H-bond acceptors. The spectroscopic behavior and the photochemical stabilities of these two compounds,NCn and its intermolecular H-bonding complex CSA·NCn were investigated by UV-Vis spectroscopy. The results show that these two compounds easily undergo photoisomerization from trans to cis isomers in alcohol. In chloroform solution,the CSA·NCn only undergoes trans-cis photoisomerization,while NCn exhibits not only trans-cis isomerization but also a special photoreaction. The reason is that in CSA·NCn compounds,the pyridyl N-end group is forms intermolecular H-bonding with CSA,and can’t catch the H+ and the radical. It is proved that this intermolecular H-bond was very stable when being exposed to UV light.
