金属离子对中位─四（4─N甲氧羰甲基吡啶）卟啉表面增强拉曼光谱的影响

Interaction of Metal Ions on Surface-Enhanced Raman Spectroscopy of Meso-tetrakis (4-N-methoxycarbonylmethylpyridyl)porphyrin

研究了金属离子对吸附在银胶表面的中位－四（４－Ｎ甲氧羰甲基吡啶）卟啉表面增强拉曼光谱的影响。结果表明，中位－四（４－Ｎ甲氧羰甲基吡啶）卟啉可发生金属离子取代反应。金属离子嵌入卟啉大环，吸附在银胶表面的中位－四（４－Ｎ甲氧羰甲基吡啶）卟啉转变为金属配合物。给出了各种金属配合物主要拉曼峰的经验式归属。金属离子的半径，ｄ电子对卟啉环的排斥作用，金属卟啉骨架模式频率随孔穴大小，大环的平面性和π－π相互作用而相应变化的特性，都可用来解释不同金属离子配合物的结构灵敏特征峰为何存在着差异。

The effect of the metal ions on the SERS spectra of meso-tetrakis (4-N-methoxycarbonylmethylpyridyl)prophyrin [H2TrNEAMS PYP(4)]adsorbed on the silver surface has bean studied The results indicated that the metal ions displacement reaction occured in free-base H2TrNEAMS PYP(4).Metal ion inserted to porphyrin macrocycle.The H2TrNEAMSPYP(4)adsorbed on the silver surface is converted to MTrNEAMSPYP complexes.The empirical assignments of major Raman bands of various metal complexes are given.The radii of metal ions,the repellent effect of d(x2-y2)electrons on the porphyrin ring,responsiveness of metalloporphyrin skeletal mode frequencies to changes in the core size and in the planarity of macrocycle and π-π interactions can be used to explain the variation of the structure sensitive bands of complexes with defferent metal ions.