Color Tuning of a Nickel Complex with a Novel N2S2 Pyridine-Containing Macrocyclic Ligand
详细信息 查看全文
- 作者：Abel Tamayo ; Jaume Casabó ; Lluis Escriche ; Carlos Lodeiro ; Berta Covelo ; Carlos D. Brondino ; Raikko Kivekä ; s ; and Reijo Sillampä ; ä
- 刊名：Inorganic Chemistry
- 出版年：2006
- 出版时间：February 6, 2006
- 年：2006
- 卷：45
- 期：3
- 页码：1140 - 1149
- 全文大小：345K
- 年卷期：v.45,no.3(February 6, 2006)
- ISSN：1520-510X
文摘
The novel pyridine-containing 14-membered macrocycle 3,11-dithia-7,17-diazabicyclo[11.3.1]heptadeca-1(17),13,15-triene (L), which contains an N2S2 donor set, was synthesized, and its protonation behavior was studied byabsorption titration with CH3SO3H. The reaction of L with Pd(II) was studied spectroscopically, and the square-planar complex [Pd(L)](BF4) was isolated and characterized. The reactions between L and NiX2·6H2O (X = BF4,ClO4) in ethanol or acetonitrile afforded the octahedral complexes [Ni(CH3CN)(H2O)(L)](X)2 and [Ni(H2O)2(L)](X)2,respectively. The square-planar complexes [Ni(L)](X)2 were obtained by heating these octahedral complexes.Spectrophotometric titrations of [Ni(L)](BF4)2 were performed with neutral and negatively charged ligands. Thecolor of nitromethane solutions of this square-planar complex turns from red to cyan, purple, blue, yellow-green,and pink following addition of halides, acetonitrile, water, pyridine, and 2,2'-bipyridine, respectively. X-ray structuralanalyses were carried out on the {[Ni(ClO4)(H2O)(L)][Ni(H2O)2(L)]}(ClO4)3, [Ni(CH3CN)(H2O)(L)](ClO4)2, [{Ni(L)}2(
-Cl)2](ClO4)2, and [{Ni(L)}2(-Br)2]Br2·2CH3NO2 complexes.
-Cl)2](ClO4)2, and [{Ni(L)}2(-Br)2]Br2·2CH3NO2 complexes.