coordination sites are occupied by a phen from the filament connected to the other ring. An X-ray structure of the dicopper(I) complex unambiguously demonstrates the doubly threaded nature of the system. The molecule has C(2) symmetry in the crystal. This is an extended form with a Cu small middle dot small middle dot small middle dotCu separation of 18.3 A and an overall length close to 40 A. Further
A new highly rigid ditopic ligand has been prepared which consists of a terpy fragment connected through its 4â² position to the 3 position of a phen nucleus via a 1,4-phenylene linker. The chemical structure of the presently reported two-chelate ligand is such that the coordination axes of the two chelates are orthogonal to one another. The reaction of this phenâterpy conjugate with Zn2+ affords in good yield a dimeric structure, as shown by ES-MS and 1H NMR spectroscopies.
A general synthetic procedure for the preparation of multisubstituted phenanthrolines is presented. Bromination of 1, 10-phenanthroline at the 3 and 8 positions, followed by Suzuki coupling reaction and subsequent methylation afford the di-, tri and tetra- substituted phenanthrolines in good yields. These phenanthroline derivatives are useful building blocks in the construction of highly sophisticated
Syntheses, Crystal Structures, and Spectral Properties of a Series of 3,8-Bisphenyl-1,10-phenanthroline Derivatives: Precursors of 3,8-Bis(4-mercaptophenyl)-1,10-phenanthroline and Its Ruthenium(II) Complex for Preparing Nanocomposite Junctions with Gold Nanoparticles between 1 μm Gap Gold Electrodes
involved. 3,8-Bis(4-mercaptophenyl)-1,10-phenanthroline and one of its ruthenium(II) complexes were then treated with goldnanoparticles (Au-NPs) via in situ thiol-to-thiol ligand exchange in the presence of two facing Au electrodes with a 1 x 1 microm(2) gap. Stable molecularjunctionscomposed of self-assembled films were produced as revealed by an obvious increase of the conductivity between the Au electrodes
通过多步合成获得了3,8-双(4-巯基苯基)-1,10-菲咯啉及其钌(II)配合物,该分子具有两个分子量为1.89 nm的游离硫醇端基。为了获得有关分子以及结构中超分子相互作用的更多信息,研究了五种单晶结构以及相关中间体在甲醇和固态中的紫外可见光谱。相关的Ru(II)配合物的热和电化学性质也涉及到。3,8-双(4-巯基苯基)-1,10-菲咯啉及其其中一种钌(II)配合物然后通过金纳米颗粒(Au-NPs)在原位硫醇与硫醇配位体交换的条件下进行处理两个相对的Au电极,间隙为1 x 1 microm(2)。由金电极之间的电导率明显增加所显示的,产生了由自组装膜组成的稳定的分子结,其中二硫醇桥联的金纳米颗粒通过金-硫键合的触点连接到电极上。在7-300 K的温度范围内对结进行了随温度变化的电流-电压(IV)测量,并获得了经典的Arrhenius图及其线性拟合,以确定这些器件的平均激活能(Delta