Syntheses,crystal structures,and magnetic properties of 1-D coordination polymers |
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Abstract: | Three coordination polymers of Robson-type macrocycles, {Cu4L1(4,4′-bipy)2]·4ClO4·H2O}∞ (1), {Cu4L2(4,4′-bipy)4]·2CH3CN·4ClO4·2H2O}∞ (2), and {Zn2L2(4,4′-bipy)2]·(ClO4)2}∞ (3) (where H2L1 and H2L2 are the 2?+?2] condensation products of 1,3-diaminopropane with 2,6-diformyl-4-methylphenol and 2,6-diformyl-4-fluorophenol, respectively), have been synthesized and characterized. Magnetic susceptibility was measured for 1 and 2 from 2 to 300?K. The optimized magnetic data were J?=?–368.5?cm?1, J′?=?40.5?cm?1 with R?=?1.69?×?10?6 for 1 and J?=?–291.22?cm?1, J′?=?83.74?cm?1, ρ = 0.00168 with R?=?1.8?×?10?11 for 2, respectively. The data reveal strong antiferromagnetic interactions between two Cu(II) ions in the macrocyclic unit and ferromagnetic interaction between the Cu(II) ions in two adjacent macrocyclic units for 1 and 2. |
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Keywords: | Robson-type macrocyclic complex Coordination polymer Magnetism |
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