A thermodynamic and spectrophotometric study of anion binding with a multifunctional dipyridine-based macrobicyclic receptor

被引：13

作者：

Anda, C

Bazzicalupi, C

Bencini, A

Berni, E

Bianchi, A

Fornasari, P

Llobet, A

Giorgi, C

Paoletti, P

Valtancoli, B

机构：

[1] Univ Florence, Dept Chem, I-50019 Florence, Italy

[2] Univ Girona, Dept Chem, Girona 17071, Spain

来源：

INORGANICA CHIMICA ACTA | 2003年 / 356卷

关键词：

macrocycles; thermodynamics; anion binding; nucleotides; phosphate;

D O I：

10.1016/S0020-1693(03)00405-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Synthesis and characterisation of a new macrobicycle containing two dipyridine units (L) is reported. Protonated forms of L are efficient receptors for inorganic phosphate and nucleotide anions. The binding properties of L toward these substrates have been investigated in aqueous solution by means of potentiometric, microcalorimetric and H-1 NMR measurements. Only 1:1 receptor-anion complexes have been found in solution. The stability of the adducts with inorganic phosphates anions is higher than that found for the nucleotides complexes. The complexation reactions are endothermic, and promoted by invariably favourable entropic contributions, indicating that these pairing processes are mostly determined by the desolvation of the interacting species that occurs upon charge neutralisation. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：167 / 178

页数：12

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