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Intercalation Characteristics of Rhodamine 6G in Fluor-Taeniolite: Orientation in the Gallery

Published online by Cambridge University Press:  28 February 2024

Taketoshi Fujita ,
Nobuo Iyi ,
Tetsushi Kosugi ,
Akitsugu Ando ,
Takahiro Deguchi  and
Takayuki Sota
Taketoshi Fujita
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki, 305 Japan
Nobuo Iyi
Affiliation:
National Institute for Research in Inorganic Materials, Namiki 1-1, Tsukuba, Ibaraki, 305 Japan
Tetsushi Kosugi
Affiliation:
Topy Industries Limited, Akemi-cho 1, Toyohashi, Aichi, 440 Japan
Akitsugu Ando
Affiliation:
Topy Industries Limited, Akemi-cho 1, Toyohashi, Aichi, 440 Japan
Takahiro Deguchi
Affiliation:
Department of Electrical Engineering, Waseda University, Shinjuku, Tokyo, 169 Japan
Takayuki Sota
Affiliation:
Department of Electrical Engineering, Waseda University, Shinjuku, Tokyo, 169 Japan
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Abstract

The orientation of rhodamine 6G (R6G) in the 22-Å basal-spaced complex with Li-fluor-taeniolite has been studied using X-raypowder diffraction, 1-dimensional Fourier analysis, polarized infrared (IR) spectroscopy, carbon analysis and thermal analysis. The R6G was adsorbed by cation exchange in aqueous solution. In the range of 0.086 to 0.46 molar ratio of R6G to taeniolite, the basal spacings of the complex were nearly constant at 21.7 to 22.2 Å. From X-raydiffraction (XRD) data, it was confirmed that R6G in the complex orients with its longest xanthene ring axis perpendicular to the ab plane of the host. The pleochroism of IR absorption bands at 1331, 1517, 1537 and 1621 cm−1 supports the vertical orientation. The wide stability range of the vertical configuration is consistent with the strong coulombic force between the highly negatively charged silicate layer of the host [cation exchange capacity (CEC) = 157 ± 9 meq/100 g] and the positively charged nitrogen bonded to both sides of the R6G xanthene ring.

Keywords

Infrared SpectroscopyIntercalationLi-fluor-TaenioliteMicaRhodamine 6GX-ray Diffraction
Type
Research Article
Information
Clays and Clay Minerals , Volume 45 , Issue 1 , February 1997 , pp. 77 - 84
Copyright
Copyright © 1997, The Clay Minerals Society

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