新型Ru(Ⅱ)配合物的合成及其自组装膜的光电性能

合成了含芘基的新型钌(Ⅱ)配合物Ru-1,用1H-NMR和MS表征了这种配合物的分子结构。TG-DSC测试结果表明,Ru-1在一个较宽的温度范围内具有良好的热稳定性。在HOPG、石墨烯基电极表面组装了钌配合物分子膜,并对其进行了AFM、电化学及紫外可见吸收光谱等光电化学分析。结果表明,自组装膜的生长是均匀的,膜材料具有可逆的氧化还原过程,在0.47 V出现可逆的氧化还原峰。紫外可见吸收光谱表明,这种膜材料在较宽的紫外可见区表现出强且宽的吸收峰。钌配合物对石墨烯、HOPG炭素电极的修饰,使这类炭素电极具有良好的光电性能和稳定性。

Preparation and Photovoltaic Performance of Novel Ruthenium Complex and Its Self-assembly Membrane

A novel symmetrical ruthenium complex (Ru-1) bearing pyrene groups was synthesized, and its molecular structure and purity were characterized by ¹H-NMR and ESI-MS. The ruthenium complex delivered ideal stability and performance over a wider range of temperature (below 400°C), which suggests that the stability of this material can satisfy the requirement of dye-sensitized solar cell. Thin films of Ru-1 complex can be prepared onto both graphene- and HOPG-electrode surface via self-assembly process, then their surface morphology and photoelectricity property were examined by means of AFM, Cyclic voltammetry and UV-vis spectroscopy. The results show that the growth of the film was uniform. A couple of sensitive and reversible redox peaks were acquired from the cyclic voltammograms of Ru-1 modified carbon electrodes, the Ru (II/III) oxidative peak was observed at 0.47 V. Uv-vis absorption spectra show that the membrane materials have intense and wide absorption peaks in a wider range, which is favorable for capture sunlight at longer wavelength. In sum, a carbon electrode of excellent photoelectric properties and stability can be obtained by modifying both graphene and HOPG electrodes with Ru-1complex.