Issue 16, 2019

Temperature-assisted formation of reversible metallophilic Au–Ag interaction arrays

Abstract

A temperature-controlled self-assembly process in a solution of [Ag(terpy)]nn+ and [Au(C6F5)2] units has been performed. For this, the crystallisation of the complex [{Au(C6F5)2}Ag(terpy)]n under the same experimental conditions, changing only the temperature, allows the synthesis of polymorphs [{Au(C6F5)2}2Ag2(terpy)2]n (2a) at 298 K and [{Au(C6F5)2}Ag(terpy)]n (2b) at 280 K. The X-ray diffraction studies previously reported for 2a revealed a polymeric structure with an unusual + + − − + + − − charge sequence, whereas for polymorph 2b, a more classical + − + − disposition has been obtained. The conversion of one polymorph into the other can be achieved by simple dissolution of one of them and by recrystallisation at the corresponding temperature. The mechanism of the formation of each polymorph is proposed in view of their 1H NMR, 1H-PGSE NMR and molar conductivity measurements.

Graphical abstract: Temperature-assisted formation of reversible metallophilic Au–Ag interaction arrays

Supplementary files

Article information

Article type
Communication
Submitted
19 Feb 2019
Accepted
20 Mar 2019
First published
21 Mar 2019

Dalton Trans., 2019,48, 5149-5155

Temperature-assisted formation of reversible metallophilic Au–Ag interaction arrays

M. Gil-Moles, M. C. Gimeno, J. M. López-de-Luzuriaga, M. Monge and M. E. Olmos, Dalton Trans., 2019, 48, 5149 DOI: 10.1039/C9DT00751B

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