中位-四(4-N-甲氧羰甲基吡啶)卟啉镍配合物的表面增强拉曼光谱研究  

Studies on the Surface-Enhanced Raman Spectra of meso-Tetrakis (4-N-methoxycarbonyl methyl pyridyl)porphyrin and Its Nickel Complexes

作　　者：何季平[1] 周翔[2] 吴萱阶[2] 陈彰评[2] 

机构地区：[1]武汉工业大学材料研究与测试中心,武汉430070 [2]武汉大学化学系

出　　处：《高等学校化学学报》1993年第8期1103-1106,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：研究了季铵盐型的中位-四(4-N-甲氧羰甲基吡啶)。卟啉(H_2T_(rNEAMS)PyP(4))及其镍配合物(NiT_(rNEAMS)PyP(4))的共振拉曼光谱和表面增强拉曼光谱,对其拉曼特征频率作了经验归属,并研究了溶液酸度对拉曼光谱的影响.实验结果表明,该配合物随着溶液酸度的变化,具有不同的存在形式,且彼此保持一定的平衡关系。The surface-enhanced Raman spectra (SERS) and resonance Raman spectra (RRS) of Ni( Ⅱ)TrNEAMsPyP(4) were measured and compared with the Raman spectra of Ni( Ⅱ )TMPyP (4). Band assignments are made by analogy to those for Ni( Ⅱ )TMPyP. pH-dependent spectra of Ni( Ⅱ )TrNEAMSPyP(4) and H2TrNEAMSPyP(4) are presented. It has been found that the neutral aqueous solution of Ni complexes contains 4-coordinate Ni( Ⅱ )TrNEAMsPyP(4) and 6-coordinate Ni( Ⅱ )TrNEAMSPyP(4)(H2O)2. In acid solution, we assign the structure as the diaquo complexes or cat ionic complexes Ni( Ⅱ )TrNEAMSPyP(4)+ and show the transition from diaquo to hydroxy monomer/μ-O dimer complexes in the slightly alkaline solution. At pH 14. 0 a second equilibrium process was observed, leading to dihydroxy complex.

关 键 词：卟啉 镍 配合物 表面增强 拉曼光谱 

分 类 号：O614.813[理学—无机化学]