A thiourea-functionalized benzo-15-crown-5 for cooperative binding of sodium ions and anions

Seiichi Nishizawa; Kazuki Shigemori; Norio Teramae

doi:10.1246/cl.1999.1185

A thiourea-functionalized benzo-15-crown-5 for cooperative binding of sodium ions and anions

Seiichi Nishizawa, Kazuki Shigemori, Norio Teramae

SCI - Chemistry

Tohoku University

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

A new bifunctional receptor 1 for cooperative complexalion of cations and anions is synthesized on the basis of benzo-15-crown-5, functionalized with a thiourea moiety as anion binding sites. When Na⁺ is bound to the crown moiety of 1 , the association constants of I^-, Br^- and NO₃^- in CD₃CN are significantly increased, as compared with free 1 . Thermodynamic studies indicate that these large increases in complex stabilities can be ascribed primarily to the enthalpic effect.

Original language	English
Pages (from-to)	1185-1186
Number of pages	2
Journal	Chemistry Letters
Issue number	11
DOIs	https://doi.org/10.1246/cl.1999.1185
Publication status	Published - 1999

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abstract = "A new bifunctional receptor 1 for cooperative complexalion of cations and anions is synthesized on the basis of benzo-15-crown-5, functionalized with a thiourea moiety as anion binding sites. When Na+ is bound to the crown moiety of 1 , the association constants of I-, Br- and NO3- in CD3CN are significantly increased, as compared with free 1 . Thermodynamic studies indicate that these large increases in complex stabilities can be ascribed primarily to the enthalpic effect.",

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doi = "10.1246/cl.1999.1185",

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AU - Nishizawa, Seiichi

AU - Shigemori, Kazuki

AU - Teramae, Norio

PY - 1999

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AB - A new bifunctional receptor 1 for cooperative complexalion of cations and anions is synthesized on the basis of benzo-15-crown-5, functionalized with a thiourea moiety as anion binding sites. When Na+ is bound to the crown moiety of 1 , the association constants of I-, Br- and NO3- in CD3CN are significantly increased, as compared with free 1 . Thermodynamic studies indicate that these large increases in complex stabilities can be ascribed primarily to the enthalpic effect.

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A thiourea-functionalized benzo-15-crown-5 for cooperative binding of sodium ions and anions

Abstract

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