四(对-硝基苯基)卟啉配合物的红外和拉曼光谱

Infrared and Raman Spectra of Tetra(p-nitrophenyl) Porphyrin and Its Transition Metal Complexes

本文研究了四(对-硝基苯基)卟啉及其Cr(Ⅲ)、Mn(Ⅲ)、Fe(Ⅲ)、Co(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)配合物的3500～220cm^(-1)的红外光谱和1700～100cm^(-1)的拉曼光谱.谱带归属表明,～250cm^(-1)谱带是M—N伸缩振动和卟啉环变形振动的复合振动.金属敏感带出现在～1600、～1582、～1547、～1284、～1190、～355和～245cm^(-1)处,其中二价金属配合物金属敏感带频率按Ni>Co>Cu>Zn顺序递减.用金属半径和d_x^2 y^2电子排斥作用解释了金属敏感带变化规律.

The Infrared spectra(220-3500 cm-1)and Raman spectra(100-1700 cm-1)of te-tra(p-nitrophenyl)porphyrin and its Cr(Ⅲ),Mn(Ⅲ),Fe(Ⅲ),Co(Ⅱ),Ni(Ⅱ),Cu(Ⅱ)and Zn(Ⅱ)complexes were measured and investigated respectively.The band at 3321 cm-1 and 988 cm-1 belonging to N-H vibrations of pyrrole disappears when the complex formed.The metal sensitive bands were found at-1600,-1582,~1547,-1284,-1190,-355 and-245 cm-1.The bands at ~355 and ~245 cm-1 of the complexes decrease in wave number in the order of Ni(Ⅱ)>Co(Ⅱ)>Cu(Ⅱ)>Zn(Ⅱ).The bands at-3110,-1600,-1520,-1350,-850 and-825 cm-1 resulted from p-nitrobenzene of the porphyrin