Exfoliation and film preparation of a layered titanate, Na2Ti3O7, and intercalation of pseudoisocyanine dye

被引:91
作者
Miyamoto, N
Kuroda, K
Ogawa, M
机构
[1] Waseda Univ, Dept Earth Sci, Shinjuku Ku, Tokyo 1698050, Japan
[2] Waseda Univ, Dept Appl Chem, Shinjuku Ku, Tokyo 1698555, Japan
[3] Waseda Univ, Kagami Mem Lab Mat Sci & Technol, Shinjuku Ku, Tokyo 1690051, Japan
关键词
D O I
10.1039/b308800f
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Fine powders of propylammonium-exchanged Na2Ti3O7 were successfully converted to transparent thin films by swelling ( and exfoliating) the material in water and subsequent casting and drying the obtained titanate sol on a substrate. The dispersion of the material was promoted by sonication and hydrothermal treatment of the sol. A self-standing film was also obtained by depositing the sol on a Teflon substrate and subsequent peeling off from the substrate by soaking in acetone. Taking advantage of the cation exchange capability of the films thus obtained, a cationic cyanine dye ( pseudoisocyanine) was intercalated with retaintion of the transparency and morphology of the films. Polarized visible spectra revealed that the intercalated dyes were present as J-aggregates with the dipole moment oriented parallel to the film surface. The present methodology is a convenient way to fabricate titanate - dye hybrids as films.
引用
收藏
页码:165 / 170
页数:6
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