Synthesis of alkali metal complexes of Cyclen derivatives
1.School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang， Jiangsu 212013, China; 2.School of Energy and Power Engineering, Jiangsu University, Zhenjiang， Jiangsu 212013, China; 3.Key Laboratory of Fine Petrochemical Engineering, Jiangsu Polytechnic University, Changzhou， Jiangsu 213164, China
Abstract：The tetra-N-alkylations of 1,4,7,10-tetraazacyclododecane(Cyclen) derivative 1,4,7,10-tetrakis(2-((4-methoxy) phenoxy)ethyl)-1,4,7,10-tetraazacyclododecane 2 with pendant-armed benzene was designed and prepared with one Cyclen base and four hydroquinone groups of benzene ring. Cyclen base is easily to coordinate with metal ion, and hydroquinone groups can form π-electron-rich cavity by stacking interaction. Two complexes of 3 and 4 were prepared by the reactions of 2 with LiBr and LiCl through an improved synthetic technique. The structure was confirmed by 1H NMR. The chemical shifts of the peaks and fluorescence spectra of 1, 2, 3 and 4 were investigated. The results show that hydrogen atoms of NCH2CH2N in 3 and 4 Cyclen unit are split into two to increase the fluorescence intensity obviously.
2016, Vol. 37 
