Syntheses, structures, absorption and emission properties of a tetraiminodiphenol macrocyclic ligand and its dinuclear Zn(II) and Pb(II) complexes

摘要

Synthesis of a Robson type macrocyclic ligand [H4L](ClO4)(2) (1) obtained on condensation of 2 6-diformyl-4-methylphenol and 2,2'-dimethyl-1,3-diaminopropane, template synthesis of a dinuclear lead(II) complex [(Pb2L)-L-II(NO3)(2)] (2), synthesis of a dinuclear zinc(II) complex [(Zn2L)-L-II(NO3)](ClO4) (3) through metal substitution reaction and synthesis of another dinuclear zinc(II) complex [(Zn2L)-L-II(H2O)(2)](ClO4)(2)center dot(H2O)(2) (4) obtained directly from 1 are described in the present study. Crystal structure determinations of 1 and 3 have been carried out. Both the compounds 1 and 3 crystallize in the orthorhombic system with the space groups Fdd2 and P2(1)2(1)2, respectively. Spectrophoto metric and spectrofluorometric titrations of 1 with triethylamine as well as with zinc(II) acetate are also reported.