金属卟啉及其NO吸附物的FT-IR漫反射研究

本文报道用于FT-IR漫反射法研究金属卟啉(M TPP)M=Fe、Co、Ni和Cu]以及它们在室温下吸附NO的实验结果.实验表明,在相同的合成条件下,Fe和Co(比起Ni和Cu)容易形成金属卟啉配合物.FeTpp和CoTpp在室温下容易化学吸附NO分子,形成稳定的吸附物,分别产生1882.7和1695.1cm~(-1)谱峰。载体TiO_2对M-Tpp的IR光谱以及对NO的吸附没有产生可观察到的影响,最后讨论了实验结果.

FT IR Diffuse Reflectance Study of Metalloporphyrin Complexes and Their NO Adsorbates

Results on the metalloporphyrin (MTPP) complexes (M=Fe, Co, Ni, and Cu), the complexes supported on TiO2 and their NO adsorbates obtained by FT-IR Diffuse Reflectance Method are reported in this paper, Metalloporphyrin complexes synthesized as the reference have deep colour and poor transparency for IR beam, and always exist as fine needles or powder. Therefore, Diffuse Reflectance FT-IR is proper for determining their spectra. The results show that Fe and Co form metalloporphyrin complexes more easily than Ni and Cu, and FeTPP and CoTPP chemisorb nitric oxide easily at room temperature. The changes of their spectra had been observed and the peaks of NO adsorption had also been found. No effect of the support TiO2 is observed on the IR feature of these complexes and the adsorption of nitric oxide.