B Ghanbari - Department of Chemistry, Sharif University of Technology, Tehran, Iran
M Mahdavian - Department of Chemistry, Sharif University of Technology, Tehran, Iran

In the present communication, a novel bimacrocyclic tweezer linked through diazobenzenemoiety was synthesized and characterized by ESI MS, IR, 1H and 13C NMR, UV-vis spectroscopy aswell as CHN microanalysis. UV light was irradiated the tweezer to promote the cis-trans isomerization.The molecular structure of the tweezer was calculated by using DFT method. A significant interactionbetween the cis isomer of the tweezer with C60 was also found in terms of the association constantcalculated by 1H NMR spectroscopy. More importantly, these calculations suggested a novelunprecedented interaction between the HOMO’s of diazaobenzene moiety on the tweezer instead of thearomatic groups with C60.

azo tweezer, C60, diazobenzene, cis-trans