共 50 条
A colorimetric anion sensing system utilising competitive C-H•••X- hydrogen bonding
被引:5
|作者:
Sato, Kiyoshi
[1
]
Okabe, Yuko
[1
]
Onitake, Tomomi
[1
]
Yamaguchi, Motowo
[1
]
Arai, Sadao
[2
]
Yamagishi, Takamichi
[1
]
机构:
[1] Tokyo Metropolitan Univ, Grad Sch Urban Environm Sci, Dept Appl Chem, Tokyo 1920397, Japan
[2] Tokyo Med Univ, Dept Chem, Shinjyuku Ku, Tokyo, Japan
关键词:
anion recognition;
imidazolium;
competitive binding;
C-H hydrogen bonding;
colorimetric anion sensing;
DYES;
INDICATORS;
RECEPTORS;
COMPLEXES;
LEADS;
RING;
D O I:
10.1080/10610278.2010.521839
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Combination of tripodal imidazolium-based anion receptor 1 and azonia betaine dye 2 has enabled a colorimetric detection of halide ions by competitive binding. The imidazolium groups of receptor 1 interact with the phenoxy oxygen of betaine dye 2 in acetonitrile solution by multiple [C-H...O-] hydrogen bonds. Consequently, the blue-coloured solution of the dye immediately turns to greenish yellow upon addition of receptor 1 due to the receptor-dye complex formation. The reversed colour change, which is caused by displacement of guests, is observed by the addition of Cl-, Br- or I- anions to the receptor-dye complex solution.
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页码:249 / 251
页数:3
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