Complexation of Cu(II) and Ni(II) by nitrilotriacetate intercalated in Zn-Cr layered double hydroxides
Complexation of Cu(II) and Ni(II) by nitrilotriacetate intercalated in Zn-Cr layered double hydroxides
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DOI：
10.1039/a909902f
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发表时间：
2000-05-01
影响因子：
--
通讯作者：
Turney, TW
中科院分区：
文献类型：
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作者：
Gutmann, NH;Spiccia, L;Turney, TW
直接和间接阴离子交换法已被用于插入[Zn（II）2-Cr-III]层状双氢氧化物（LDH），与[Cu（nta）]（-）和[Ni（nta）]（-）（nta =次氮基三乙酸酯）。对于直接方法，使用预形成的络合物的溶液来插层LDH，而对于间接方法，阴离子nta配体被插层，产物被分离，然后与金属离子的溶液反应以产生插层络合物。LDH阶段与垂直和倾斜方向的复杂的建议占形成的产品与基础间距为14和12埃，分别。优选的排列随金属离子、温度和合成方法而变化。对于间接方法，两种金属盐抗衡阴离子，即，硫酸盐和甲苯磺酸盐从层间置换金属络合物，而氯化物和硝酸盐对层间位置的竞争很差。
Direct and indirect anion exchange methods have been used to intercalate a [Zn(II)2-Cr-III] lamellar double hydroxide (LDH), with [Cu(nta)](-) and [Ni(nta)](-) (nta = nitrilotriacetate). For the direct method, a solution of the pre-formed complexes was used to intercalate the LDH while for the indirect method the anionic nta ligand was intercalated, the product was isolated and then reacted with a solution of the metal ion to produce the intercalated complex. LDH phases with vertical and tilted orientations of the complex are proposed to account for the formation of products with basal spacings of 14 and 12 Angstrom, respectively. The preferred arrangement varies with the metal ion, temperature and synthetic method. For the indirect method, two metal salt counter anions, viz., sulfate and tosylate, displaced the metal complex from the interlayer while chloride and nitrate competed poorly for the interlayer positions.