FTIR－PAS技术在卟啉类化合物中的应用（Ⅲ）──乙酰丙酮－meso－四－（对－氯代）苯基卟啉稀土配合物的红外光声光谱

Application of Fourier Transform Infrared Photoacoustic Spectroscopy to Porphyrins Studies(Ⅲ)──FTIR-PAS of Lanthanide Acetylacetonate-meso-Tetra(para-chlorophenyl)Porphyrin Rare Earth Complexes

研究乙酰丙酮－ｍｅｓｏ－四－（对－氯代）苯基卟啉及其Ｎｄ、Ｓｍ、Ｅｕ、Ｇｄ、Ｔｂ、Ｄｙ、Ｈｏ、Ｅｒ、Ｌｕ配合物在３６００～２２０ｃｍ－１范围内的傅立叶变换红外光声光谱，对其主要谱带进行经验归属．实验结果表明，四－（对－氯代）苯基卟啉与稀土乙酰丙酮配合物中的金属离子配位，削弱乙酰丙酮环上的Ｍ－Ｏ键伸缩振动，使该谱带向低波数方向移动．金属敏感带出现在～１５５８、～１４７４、～１４２７、～１２１９、～７９８、～７３３、～２５０ｃｍ－１．

The fourrier transform infrared photoacoustic spectra of tetra-(parachlorophenyl)porphyrin and its coordination compounds LnT(p-Cl)PPacac(Ln:Nd,Sm,Eu Gd,Tb,Dy,Ho,Er,Lu)in the range of 3600-220 cm-1 were measured and investigated. Because of the coordination bonding between the rare earth ion and nitrogen in LnT(p-Cl)PPacac forms,the band near 400 cm-1 and M-O stretching vibration on the acetylacetonate ring become weaker,and shifted to the lower wavenumber. Metal sensitive bands were found at about 1558,1474,1427,1219,798,733 and 250 cm-1.