Authors: Bahram Ghanbari Parisa Gholamnezhad Mojgan Hatami
Publish Date: 2014/08/29
Volume: 118, Issue: 3, Pages: 1631-1637
Abstract
A simple method for the formation of inclusion complex of 60fullerene with two O2N2donor azacrown macrocyclic ligands was introduced The products were characterized using UV–vis and IR spectroscopies as well as HPLC and ESI mass spectrometry The ESI mass and elemental analysis data revealed that the ratio of macroring60fullerene were not the same The binding capability of the macrorings as well as the number of the macroring addends to 60fullerene were investigated using thermogravimetric analysis TG and differential scanning calorimetry DSC Considering percentage mass loss in different steps of TG and the enthalpy changes in DSC found for each of these products the number of their addends on 60fullerene were calculated Theoretical calculations in semiempirical level using AM1 suggested that proper orientation of the nitrogendonor groups on the azacrown macrorings toward 60fullerene could be the main factor for the observed difference in the number of macroring addends attached to 60fullereneFinancial support from Research Office of Sharif University of Technology and Iran National Science Foundation is greatly acknowledged The authors thank Dr A Ghassempour from Medicinal Plants and Drugs Research Institute Iran for running ESImass spectrum
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