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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
卟啉
镍
配合物
表面增强
拉曼光谱
Meso-tetrakis(4-N-methoxycarbonyl methyl pyridyDporphyrin nickel complex
Surface-enhanced Raman spectra
Resonance Raman spectra
