Dichroic measurements on dicationic and tetracationic porphyrins on clay surfaces with visible-light-attenuated total reflectance
Dichroic measurements on dicationic and tetracationic porphyrins on clay surfaces with visible-light-attenuated total reflectance
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DOI：
10.1246/bcsj.80.1350
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发表时间：
2007-07-15
影响因子：
4
通讯作者：
Inoue, Haruo
中科院分区：
文献类型：
--
作者：
Eguchi, Miharu;Tachibana, Hiroshi;Inoue, Haruo
合成了粘土矿物与阳离子和四阳离子卟啉形成的络合物。多阳离子卟啉与粘土形成络合物后，Soret谱带向长波方向移动。利用原子力显微镜(AFM)和偏振可见光衰减全反射光谱(PV-ATR)对粘土片层本身和粘土表面的卟啉分子进行了检测。原子力显微镜证实了粘土片在玻璃基板上的平坦吸附。推导了ATR光谱分析的理论处理方法。PV-ATR分析表明，多阳离子卟啉分子在水中的取向与粘土表面几乎平行(？lt；5度)。
Complexes formed with synthetic clay minerals and dicationic and tetracationic porphyrins were prepared. The Soret bands of the multicationic porphyrins shifted to longer wavelength upon the formation of a complex with clay. The clay sheets themselves and the porphyrin molecules on the clay surface were examined by use of atomic force microscopy (AFM) and polarized visible-light-attenuated total reflectance (ATR) spectroscopy (PV-ATR) with a wave-guide system. The flat adsorption of the clay sheets on the glass substrates was confirmed by AFM. A theoretical treatment of the analysis by ATR spectroscopy was derived. The orientations of the multicationic porphyrin molecules on the clay sheets in water turned out to be nearly parallel (< 5 degrees) to the clay surface, based on the PV-ATR analysis.