Synthesis, crystal structure and magnetic properties of one-dimensional coordination polymers

摘要

Three new coordination polymers of Robson-type macrocycles, {[Cu_2L~1(bipy)]·(ClO_4)_2℃H_3CN}_∞ (1), {[Cu_2- L~2(bipy)]·(ClO_4)_2·H_2O}_∞ (2) and {[Cu_2L~1(C_8H_4O_4)]·(H_2O)_3}_∞ (3) (where H_2L~1and H_2L_2 are the [2+2] condensation products of 1,3-diaminopropane with 2,6-diformyl-4-flurophenol and 2,6-diformyl-4- chlorophenol, respectively), have been synthesized and characterized. The magnetic susceptibility was measured for 1, 2 and 3 over the temperature range 2-300 K. The optimized magnetic data were J = -317.6 cm~(-1), j0 = 4.01 cm~(-1), q = 0.00031 with R = 8.5 × 10~(-39) for 1, J = -320.91 cm~(-1), j' = 4.39 cm~(-1), q = 0.0013 with R = 1.8 × 10~(-39) for 2 and J = -221.01 cm~(-1), TIP = 0.00225, with R = 6 × 10~(-5) for 3.