Thermodynamics of complexation between thiourea-based receptor and acetate in water/acetonitrile mixture

Takaya Suzuki, Yuuta Shibuya, Takaya Sato, Seiichi Nishizawa, Itaru Sato, Akira Yamaguchi

研究成果: Article

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抜粋

A thiourea-based receptor has been extensively studied for selective anion recognition for reasons of its strong hydrogen bond donor ability. In the present study, the thermodynamics of complexation between a thiourea-based receptor and acetate was examined in a water/acetonitrile mixture. The receptor used in this study was N,N'-bis(p-nitrophenyl)thiourea (BNPTU). UV/vis spectroscopic titration and isothermal titration calorimetry (ITC) experiments clearly revealed endothermic and entropy-driven complexation of BNPTU with acetate in water/acetonitrile mixtures. Since the endothermic peaks found in water/acetonitrile mixtures were about three times greater than those in acetonitrile, it appears that preferential hydration of both receptor and acetate was responsible for the endothermic and entropy-driven complexation reaction. The thermodynamic properties found in this study have the potential to contribute to the design of a thiourea-based anion receptor.

元の言語English
ページ(範囲)741-744
ページ数4
ジャーナルanalytical sciences
32
発行部数7
DOI
出版物ステータスPublished - 2016

ASJC Scopus subject areas

  • Analytical Chemistry

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