Di Bella Santo, Sortino Salvatore, Conoci Sabrina, Petralia Salvatore, Casilli Serena, Valli Ludovico
Dipartimento di Scienze Chimiche, Università di Catania, 95125 Catania, Italy.
Inorg Chem. 2004 Aug 23;43(17):5368-72. doi: 10.1021/ic049381y.
In this paper the preparation and characterization of Langmuir-Schäfer (LS) films of a novel amphiphilic dipolar complex, Ru(II)(NH(3))(5)(N-dodecyl-4,4'-bpy)(3) (1), are reported. Preparation of these films, otherwise precluded utilizing standard Langmuir procedures, is achieved by using a subphase at relatively high ionic strength, by addition of NH(4)PF(6). The morphology and the spectroscopic features of the floating films are investigated by Brewster angle microscopy and UV-vis reflection spectroscopy at the water-air interface, respectively, whereas LS films are characterized by absorption spectroscopy and atomic force microscopy. The overall results indicate the existence of aggregates of 1 and formation of homogeneous, densely packed layers. The presented approach could represent a general method to achieve Langmuir-Blodgett films of amphiphilic metal complexes having an "almost naked" multicharged headgroup.
本文报道了一种新型两亲性偶极络合物Ru(II)(NH(3))(5)(N-十二烷基-4,4'-联吡啶)(3) (1)的朗缪尔-谢弗（LS）膜的制备与表征。这些膜的制备若采用标准朗缪尔方法是无法实现的，而通过使用离子强度相对较高的亚相并添加NH(4)PF(6)得以实现。分别通过布鲁斯特角显微镜和水-空气界面处的紫外-可见反射光谱研究了漂浮膜的形态和光谱特征，而LS膜则通过吸收光谱和原子力显微镜进行表征。总体结果表明存在1的聚集体以及形成了均匀、紧密堆积的层。所提出的方法可能代表了一种实现具有“几乎裸露”多电荷头基的两亲性金属络合物的朗缪尔-布洛杰特膜的通用方法。
