Structural Effect of Amphiphilic Crown Ether Azoprobes on Alkali Metal Ion Recognition and Aggregation Behavior in Water

Structural Effect of Amphiphilic Crown Ether Azoprobes on Alkali Metal Ion Recognition and Aggregation Behavior in Water

Amphiphilic azoprobes having a crown ether moiety (15C5–Azo–Cn; n=4, 6, 8, and 12 and 18C6–Azo–Cn; n=4, 6, and 8) were synthesized. We examined the effect of alkyl spacer length of the amphiphilic azoprobes on the spectral response to alkali metal ions in water by UV–vis spectral and 1H NMR measurem...

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Veröffentlicht in:Bulletin of the Chemical Society of Japan 2008-12, Vol.81 (12), p.1589-1594
Hauptverfasser: Sato, Fuyuki, Tsukano, Miki, Sakamoto, Koki, Umemoto, Wakako, Hashimoto, Takeshi, Hayashita, Takashi
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container_end_page 1594
container_issue 12
container_start_page 1589
container_title Bulletin of the Chemical Society of Japan
container_volume 81
creator Sato, Fuyuki
Tsukano, Miki
Sakamoto, Koki
Umemoto, Wakako
Hashimoto, Takeshi
Hayashita, Takashi
description Amphiphilic azoprobes having a crown ether moiety (15C5–Azo–Cn; n=4, 6, 8, and 12 and 18C6–Azo–Cn; n=4, 6, and 8) were synthesized. We examined the effect of alkyl spacer length of the amphiphilic azoprobes on the spectral response to alkali metal ions in water by UV–vis spectral and 1H NMR measurements. 15C5–Azo–Cn exhibited self-assembly in response to K+ selectively and the most selective response to K+ was observed for an azoprobe possessing a hexyl spacer unit (15C5–Azo–C6). 15C5–Azo–C12 formed nano-size aggregates. 18C6–Azo–Cn (n=6 and 8) showed Cs+ selectivity and its molecular aggregation behavior was similar to that of 15C5–Azo–Cn.
doi_str_mv 10.1246/bcsj.81.1589
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title Structural Effect of Amphiphilic Crown Ether Azoprobes on Alkali Metal Ion Recognition and Aggregation Behavior in Water
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