Oxalate-bridged heterometallic chains with monocationic dabco derivatives
Oxalate-bridged heterometallic chains with monocationic dabco derivatives
复制标题
具有单阳离子 dabco 衍生物的草酸盐桥联异金属链
DOI：
10.1039/c6dt02955h
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Hiroki Oshio
中科院分区：
文献类型：
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作者：
Takahiro Sakurai;Ryo Saiki;Rong-Jia Wei;Graham N. Newton;Takuya Shiga;Hiroki Oshio
合成了一系列单阳离子dabco衍生物（{R-dabco}[M（solv）2][Cr（ox）3]·n（solv））（dabco = 1，4-二氮杂双环[2.2.2]辛烷，H2ox =草酸盐; R = H，M = Co（1）; R = H，M = Zn（2）; R = Bu，M = Co（3）; R = Bu，M = Zn（4）），并以其为桥连的一维链状结构.所有化合物均具有一维之字形链结构，R-dabco阳离子位于链之间。低温磁性研究表明，1和3表明，由于链间反铁磁相互作用的Co（II）和Cr（III）离子和变磁性行为的链内铁磁相互作用。对化合物4的介电常数测量表明，特定的顺电弛豫行为起源于dabco烷基取代基的旋转运动。
A series of bimetallic oxalate-bridged one-dimensional chains with monocationic dabco derivatives, ({R-dabco}[M(solv)2][Cr(ox)3]·n(solv)) (dabco = 1,4-diazabicyclo[2.2.2]octane, H2ox = oxalate; R = H, M = Co (1); R = H, M = Zn (2); R = Bu, M = Co (3); R = Bu, M = Zn (4)) were synthesized. All compounds have one-dimensional zig-zag chain structures with R-dabco cations located between chains. Cryomagnetic studies reveal that 1 and 3 showed intrachain ferromagnetic interactions between Co(II) and Cr(III) ions and metamagnetic behaviour due to interchain antiferromagnetic interactions. Permittivity measurements on compound 4 indicate specific paraelectronic relaxation behaviour originating from the rotational motion of the dabco alkyl substituent.