银(Ⅰ)、镉(Ⅱ)4-巯基吡啶配合物的光谱研究

Spectroscopy of Ag(Ⅰ),Cd(Ⅱ) Complexes with 4-Mercaptopyridine

采用常规溶液反应蒸发法以4-巯基吡啶(简写为4-MPy)为有机配体与银、镉的硝酸盐合成了两种金属有机配合物。并利用红外、拉曼、紫外-可见光谱技术对4-MPy及合成的配位化合物进行了研究,对主要红外和拉曼谱带进行了经验归属,并进一步讨论了配体和配合物的特征吸收谱带与配合物结构间的关系。在红外光谱中,配体在1 459cm-1处的吸收峰归属为CC和CN复合振动峰,形成配合物后在两种配合物中,此吸收峰分别向高波数位移至1 464和1 464cm-1。在拉曼光谱中,两种有机配位化合物在1 004和1 008cm-1处归属为环呼吸振动峰、在1 617和1 615cm-1处归属为环伸缩振动峰、在720和720cm-1处归属为β(C—C)和ν(C—S)的复合振动峰,各自十分相似。

In the present article,two kinds of metal-organic coordination compounds were synthesized between 4-mercaptopyridine（4-MPy） and nitrate of Ag（Ⅰ） and Cd（Ⅱ） by a general solution reaction and evaporation.4-mercaptopyridine and two transition metal complexes were investigated by means of infrared,Raman and ultraviolet-visible spectroscopic techniques,respectively.Assignments of the main FTIR and Raman bands were carried out in detail.The relationship between those characteristic bands and the structure of ligands and coordination compounds was discussed.In the FTIR spectra,the co-vibration absorption band of ν（CC） and ν（CN）,for 4-MPy at 1 459 cm-1 blue-shifted to 1 464 cm-1 for both the metal-organic coordination compounds,respectively.The Raman spectra,for the two coordination compounds,at 1 004 and 1 008 cm-1,which can be assigned to ring breathing vibration,at 1 617 and 1 615 cm-1,which can be assigned to ring flex vibration,and at 720 and 720 cm-1,which can be assigned to the composite vibration of β（C—C） and ν（C—S） are similar,respectively.