Ambrosi Gianluca, Formica Mauro, Fusi Vieri, Giorgi Luca, Macedi Eleonora, Micheloni Mauro, Paoli Paola, Rossi Patrizia
Department of Pure and Applied Sciences, University of Urbino , Piazza Rinascimento 6, I-61029 Urbino, Italy.
Department of Chemistry and Biology, University of Salerno , via Giovanni Paolo II 132, I-84084 Fisciano, Italy.
Inorg Chem. 2016 Aug 1;55(15):7676-87. doi: 10.1021/acs.inorgchem.6b01145. Epub 2016 Jul 21.
We synthesized and characterized the ligand N,N'-bis[(2,2'-dihydroxybiphen-3-yl)methyl]-N,N'-dimethylethylenediamine (L), which contains two biphenol moieties linked as side arms to an N,N'-dimethylethylenediamine scaffold. The ligand is highly soluble in a 50/50 (v/v) water/ethanol mixture and, in its deprotonated form H-2L(2-), is able to coordinate transition-metal ions such as Ni(II), Zn(II), Cu(II), Cd(II), and Pd(II). The crystal structures of [Ni(H-2L)·2n-BuOH], [Ni(H-2L)·2MeOH], [Cd(H-2L)·2DMF], [Cu(H-2L)(DMF)], and [Pd(H-2L)(DMF)] were also determined and described. Potentiometric titrations were carried out in a mixed solvent with Zn(II), Cu(II), and Ni(II) metal ions to determine the acid-base and stability constants. L was highly fluorescent in the visible range (400 nm). Moreover, its emission intensity increased upon the addition of Zn(II) or Cd(II) ions in an ethanol/water solution and behaved as a chemosensor for the presence of these ions in the solution.
我们合成并表征了配体N,N'-双[(2,2'-二羟基联苯-3-基)甲基]-N,N'-二甲基乙二胺(L)，它含有两个作为侧臂连接到N,N'-二甲基乙二胺骨架上的联苯酚部分。该配体在50/50(v/v)水/乙醇混合物中高度可溶，并且以其去质子化形式H-2L(2-)能够配位过渡金属离子，如Ni(II)、Zn(II)、Cu(II)、Cd(II)和Pd(II)。还测定并描述了[Ni(H-2L)·2n-BuOH]、[Ni(H-2L)·2MeOH]、[Cd(H-2L)·2DMF]、[Cu(H-2L)(DMF)]和[Pd(H-2L)(DMF)]的晶体结构。在混合溶剂中用Zn(II)、Cu(II)和Ni(II)金属离子进行电位滴定以确定酸碱和稳定常数。L在可见光范围(400nm)内具有高荧光性。此外，在乙醇/水溶液中加入Zn(II)或Cd(II)离子后其发射强度增加，并且作为溶液中这些离子存在的化学传感器。
