Nickel(II) polypyridyl Complexes of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine
Nickel(II) polypyridyl Complexes of 2,4,6-Tris(2-pyridyl)-1,3,5-triazine
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DOI：
10.1007/s10870-012-0296-7
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发表时间：
2012-07-01
影响因子：
0.8
通讯作者：
Abdi, Khatereh
中科院分区：
文献类型：
--
作者：
Hadadzadeh, Hassan;Maghami, Mahbobeh;Abdi, Khatereh
报道了含配体2,4,6-三（2-吡啶基）-1,3,5-三嗪（tptz）的两个新的单核Ni（II）配合物[Ni(tptz)(CH3OH)Cl-2](1)和[Ni(tptz)(2)](PF6)(2)中心点CH3CN(2)的合成、纯化、表征、电化学性能和荧光猝灭。用单晶x射线晶体学测定了这两种配合物的固态结构。在(1)和(2)中，Ni（II）金属中心使用了tptz配体的主要配位，并且Ni（II）周围的配位几何是一个扭曲的八面体。自由tptz配体有三个发射带，分别分配给(1)（pi-pi(*)）和(1)（n-pi(*)）态。(1)和(2)的荧光光谱表明，tptz荧光团的荧光猝灭是通过能量转移过程进行的。顺磁核磁共振磁化率数据显示，室温下(1)的有效磁矩为2.75 mu (B),(2)的有效磁矩为2.91 mu (B)。(1)的循环伏安法表明，Ni（III/II）还原偶是准可逆的，而(2)的循环伏安法表明，Ni（II/I）还原偶是电化学（EC）机制。报道了含配体2,4,6-三（2-吡啶基）-1,3,5-三嗪（tptz）的两个新的单核Ni（II）配合物[Ni(tptz)(CH3OH)Cl-2]和[Ni(tptz)(2)](PF6)(2)中心点CH3CN的合成、纯化、表征、电化学性能和荧光猝灭。用单晶x射线晶体学测定了这两种配合物的固态结构。
The synthesis, purification, characterization, electrochemical properties, and fluorescence quenching of two new mononuclear Ni(II) complexes, [Ni(tptz)(CH3OH)Cl-2] (1) and [Ni(tptz)(2)](PF6)(2)center dot CH3CN (2), containing the ligand 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) are described. Solid state structures of both complexes have been determined by single crystal X-ray crystallography. In (1) and (2), the Ni(II) metal centers use the major coordination site of the tptz ligand and the coordination geometry around the Ni(II) is a distorted octahedron. The free tptz ligand has three emission bands that are assigned to the (1)(pi-pi (*) ) and (1)(n-pi (*) ) states. The fluorescence spectra of (1) and (2) show that the fluorescence quenching of the tptz fluorophore proceeds via an energy transfer process. Magnetic susceptibility data derived from paramagnetic NMR revealed effective magnetic moments of 2.75 mu (B) for (1), and 2.91 mu (B) for (2) at room temperature. Cyclic voltammetry of (1) shows that the Ni(III/II) reduction couple is quasi-reversible whereas in complex (2), the Ni(II/I) couple indicates an electrochemical (EC) mechanism.The synthesis, purification, characterization, electrochemical properties, and fluorescence quenching of two new mononuclear Ni(II) complexes, [Ni(tptz)(CH3OH)Cl-2] and [Ni(tptz)(2)](PF6)(2)center dot CH3CN, containing the ligand 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) are described. Solid state structures of both complexes have been determined by single crystal X-ray crystallography. .