作者:TSEGAYE GASHAW、GEBREMEDIHIN REDA、HAILEMICHAEL AYALEW、NEELAIAH BABU、RAJKUMAR UPADHYAY
DOI:10.13005/ojc/290314
日期:2013.9.30
A mononuclear complex of [Ni(tta)2(H2O)2] (3) (tta = deprotonated of 1-thenoyl-4,4,4-trifluoroacetone (1)) has been prepared by the reaction of 1-thenoyl-4,4,4-trifluoroacetone (H-tta: 1) with Ni(OAc)2.4H2O (OAc = O2CMe) in a 2:1 molar ratio. Complex 3 can be extended to form a coordination polymers of general formula [Ni(tta)2(X)]n (X = 4,4'-bipy (4), pz (5), 1,4-dip (6)) by the reaction of nickel atom in 3 with s-donor ligand such as 4,4-bipyridine (4,4'-bipy), pyrazin (pz), and 1,4-diisocyanobenzene (1,4-dip). The reaction completion was controlled via FTIR and elemental analysis. ThermoGravimetric (TG) studies of 3 - 6 show a great thermal stability up to ca. 400 ºC for polymers, wherein the nickel oxide is formed at higher temperature as shown by calculations.
1-thenoyl-4,4,4-trifluoroacetone (H-tta: 1) 与 Ni(OAc)2.4H2O (OAc = O2CMe)以 2:1 的摩尔比发生反应,制备出[Ni(ta)2(H2O)2](3)的单核络合物(ta = 1-thenoyl-4,4,4-trifluoroacetone (1)的去质子化)。配合物 3 中的镍原子与 s-供体配体(如 4,4-联吡啶(4,4'-bipy)、吡嗪(pz)和 1,4-二异氰酸苯(1,4-dip))反应,可扩展形成通式为 [Ni(tta)2(X)]n (X = 4,4'-bipy (4)、pz (5)、1,4-dip (6))的配位聚合物。反应完成情况通过傅立叶变换红外光谱和元素分析进行控制。对 3 - 6 的热重(TG)研究表明,聚合物的热稳定性最高可达约 400 ºC,其中氧化镍在较高温度下形成,如计算结果所示。