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 1H 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.

A themodymanic and spectrophotometric study of anion binding with a multifunctional dipyridine-based macrobicyclic receptor / C. ANDA; C. BAZZICALUPI; A. BENCINI; E. BERNI; A. BIANCHI; P. FORNASARI; A. LLOBET; C. GIORGI; P. PAOLETTI ; B. VALTANCOLI. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - STAMPA. - 356:(2003), pp. 167-178. [10.1016/s0020-1693(03)00405-5]

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

BAZZICALUPI, CARLA;BENCINI, ANDREA;BIANCHI, ANTONIO;GIORGI, CLAUDIA;PAOLETTI, PIERO
;
VALTANCOLI, BARBARA
2003

Abstract

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 1H 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.
2003
356
167
178
C. ANDA; C. BAZZICALUPI; A. BENCINI; E. BERNI; A. BIANCHI; P. FORNASARI; A. LLOBET; C. GIORGI; P. PAOLETTI ; B. VALTANCOLI
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/257112
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