金属卟啉表面吸附NO的XPS和IR研究  

Nitric Oxide Absorbed on Metalloporphyrin Complexes by XPS and FTIR Spectroscopy

作　　者：周牧易 曹守镜[1] 姚静珊 林鸣红 程大典[1] 

机构地区：[1]厦门大学化学系 [2]厦门大学实验中心

出　　处：《厦门大学学报（自然科学版）》1989年第4期376-380,共5页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金

摘　　要：用x-光电子能谱,红外光声谱和漫反射红外光谱表征金属四苯基卟啉(MTPP,M=Fe、Co、Ni和Cu和Mn)表面对NO的吸附。观察它们的能谱和红外光谱的变化。金属卟啉的NO表面吸附物的红外光声谱谱峰有更为清晰的变化,测得v_(NO)分别为1698.6 cm^(-1)(CoTPP·NO(a)和1883.8 cm^(-1)(FeTPPCl-NO(a)。“原位”红外漫反射验的两种吸咐物,一种是稳定的,另一种是不稳定的。后者经抽空5 s即消失,可能是一种NO与卟啉环相互作用有关的谱峰,这些不稳定的谱峰相应的振动频率为1 807.3cm^(-1)(CoTPP-NO),1 830.6cm^(-1)(FeTPPCl-NO),1 799.5 cm^(-1)(NiTPP-NO)和1 801.0 cm^(-1)(CuPP-NO)X-ray Photoelectron Spectros copy and FTIR Spectroscopy have been used to study nitric oxide adsorbed on metalloporphyrin complexes. The samples used were naetallotetraphenylporphyrin (MTPP, m=Fe, Co, Ni, Cu, and Ma), synthesized according to Adler's method. X-ray Photoelectron Spec-troscopy was used to analyze the surface elemeats and examined the coordination states of nitrogen.FTIF Photoacoustic spectra showed more clear features of NO-surface adspecies on MTPP.The characteristic band of NO were observed, 1698.6cm-1 for CoTPP-NO(a) and 1883.8 cm-1 for FeTPP·NO(a) In-situ Diffuse Reflectance was applied for determinating their FT-IR spectra. Two types of NO stretching.frequencies were found: One was stable and the other unstable. The former might correspond to the stable adsorbed NO species, the latter, which easily disappeared after degassing for five seconds, might be associated with a weak interaction between NO and a peripheral part of porphyrin. These NO frequencies were 1807.3 cm-1(CoTPP), 1830.6cm-1(FeTPPC1), 1799.5 cm-1 (NiTPP) and 1801.0 cm-1(CuTPP).

关 键 词：金属卟啉 卟啉 吸附 XPS IR NO 

分 类 号：O626.13[理学—有机化学]