Microoptical spectroscopy of B1I(3) molecules adsorbed in nano-channels of zeolite single crystals

被引:7
作者
Ikemoto, Y
Nozue, Y
Qiu, S
Terasaki, O
Kodaira, T
Kiyozumi, Y
Yamamoto, T
机构
[1] JILIN UNIV,DEPT CHEM,CHANGCHUN 130023,PEOPLES R CHINA
[2] NAIR,TSUKUBA,IBARAKI 305,JAPAN
[3] NATL INST MAT & CHEM RES,TSUKUBA,IBARAKI 305,JAPAN
[4] KUBOTA CORP,ADV TECHNOL LAB,RYUGASAKI,IBARAKI 301,JAPAN
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1996年 / 217卷
关键词
microoptical spectroscopy; absorption spectra; BiI3; molecules;
D O I
10.1016/S0921-5093(96)10315-4
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Absorption spectra are reported for BiI3 molecules incorporated into channels of zeolite MOR and AFI. Polarized absorption spectra for the zeolite single crystals, of size about 50 mu m, were measured by means of microoptical spectroscopy. The absorption spectrum of BiI3 in MOR is different from that observed in LTA, and also shows a polarization dependent on the direction of the channel. The BiI3 molecule is expected to have nearly C-3v symmetry even in the MOR channels, and has a preferred orientation of the molecular axis along the channel. On the other hand, no polarization dependence of BiI3 is observed in the AFI channel, although AFI has a channel size similar to that of MOR. The cations and the framework induce the electric field inside the MOR channels, which acts as an adsorption potential for molecules. The experimental results indicate that the electric field plays an important role in the molecular orientation.
引用
收藏
页码:151 / 154
页数:4
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