CAJ | 학술논문

用水热方法合成了两个新的配位聚合物[Co(trza)](1)和[Ni(trza)(H2O)2](2)(Htrza=4H-1,2,4-三氮唑-4-乙酸).单晶X-射线衍射结构分析表明:化合物1和2具有二维(2D)层状结构.在1中,Co(II)离子采用六配位方式,分别与来自两个不同配体(trza)上的两个氮原子和四个羧基氧原子配位,形成八面体配位聚合物,每个羧基以二齿桥联方式连接两个Co原子,形成1D链,这些一维链进一步与唑环上的N原子形成2D层状结构.在2中,中心Ni(II)离子采用同样的配位模式形成八面体配位聚合物,与1不同的是:来自两个配体阴离子(trza)上的两个羧基氧原子分别被两个配位水分子所取代,且配体上的羧基氧原子采用的是单齿配位模式.化合物1的变温磁化率测定表明了金属间弱的反铁磁相互作用.此外,两个配位聚合物的IR光谱、热稳定性以及化合物1的磁性质也被测定.
용수열방법합성료량개신적배위취합물[Co(trza)](1)화[Ni(trza)(H2O)2](2)(Htrza=4H-1,2,4-삼담서-4-을산).단정X-사선연사결구분석표명:화합물1화2구유이유(2D)층상결구.재1중,Co(II)리자채용륙배위방식,분별여래자량개불동배체(trza)상적량개담원자화사개최기양원자배위,형성팔면체배위취합물,매개최기이이치교련방식련접량개Co원자,형성1D련,저사일유련진일보여서배상적N원자형성2D층상결구.재2중,중심Ni(II)리자채용동양적배위모식형성팔면체배위취합물,여1불동적시:래자량개배체음리자(trza)상적량개최기양원자분별피량개배위수분자소취대,차배체상적최기양원자채용적시단치배위모식.화합물1적변온자화솔측정표명료금속간약적반철자상호작용.차외,량개배위취합물적IR광보、열은정성이급화합물1적자성질야피측정.
Two novel coordination polymer[Co(trza)]n(1)and[Ni(trza)(H2O)2]n(2)(Htrza=4H-1,2,4-triazole-4-acetic acid)have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction analysis.The results show that 1 and 2 are two-dimensional(2D)layered coordination polymers.In 1,each Co center is six-coordinated by four carboxylate O atoms from four different trza anionic ligands and two N atoms from another two trza anionic ligands.The carboxylate groups adopts syn-skew coordination mode assembling Co(II)into 1D chains,which are linked to 2D layer through the coordination of N atoms from triazole rings.In 2,each Ni(II)center is also six-coordinated,but two water molecules take the place of two carboxylate O atoms and the carboxylate group in 2 adopts monodentate coordination mode.Temperature-dependent magnetic measurements indicate the existence of antiferromagnetic interactions in 1.In addition,the two compounds are further characterized by elemental analysis,IR and thermogravimetric analysis.