摘要
合成了两种新的草酸根桥联的双金属层状配位聚合物 ,{ [NO2 BzQl][MCr(ox) 3 ]} ∞ ,其中 [NO2 BzQl]+为 1 (p nitrobenzyl) quinolinium ,ox2 -为Oxalate ,M为Ni2 + 或Cu2 + ,并经元素分析、红外光谱表征 .变温磁化率测定结果表明 ,在这两种层状配位聚合物中 ,相邻的金属离子之间存在反铁磁偶合作用 .应用Curie -Weiss公式拟合相应的变温磁化率数据为 :C =0 .6 6 2emuK/mol,θ =- 1.6 5 8K ,R =2 .0× 10 -5(Ni2 + ) ;C =0 .17emuK/mol,θ=- 0 .6 93K ,R =1.86× 10 -6(Cu2 + ) .
Two new bimetallic coordination polymers, {[MCr(ox) 3]} ∞,where +=1 ( p nitrobenzyl)quinolinium, ox 2- =oxalate, M=Ni 2+ (A) or Cu 2+ (B), were synthesized, and characterized by elemental analysis, infrared spectra. The bonds of ν as (C=O)? δ (C=O) are at 1644 cm -1 ? 815 cm -1 for complex (A), and 1635 cm -1 ? 811 cm -1 for complex (B), respectively. The results of IR for (A) and (B) indicated that two complexes form 2-D layer structures in the solid state. The results of the variable temperature magnetic susceptibilities for (A) and (B) revealed that there exist antiferromagnetically coupled interactions both intra and interlayer. The best fit parameters using Curie-Weiss formula are as follows: C =0.662 emu K/mol, θ =-1.658 K, and agreement factor R =2.0×10 -5 for (A). C =0.17 emu K/mol, θ =-0.693 K, and R =1.86×10 -6 for (B).
基金
国家自然科学基金资助项目 (2 0 1710 0 1)
安徽省科技厅"十五"科技攻关资助项目 (0 10 12 0 38)~~
