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

Gil-Moles, M. ; Gimeno, M.C. (Universidad de Zaragoza) ; López-De-Luzuriaga, J.M. ; Monge, M. ; Olmos, M.E.

Resumen: A temperature-controlled self-assembly process in a solution of [Ag(terpy)] n n+ and [Au(C 6 F 5 ) 2 ] - units has been performed. For this, the crystallisation of the complex [{Au(C 6 F 5 ) 2 }Ag(terpy)] n under the same experimental conditions, changing only the temperature, allows the synthesis of polymorphs [{Au(C 6 F 5 ) 2 } 2 Ag 2 (terpy) 2 ] n (2a) at 298 K and [{Au(C 6 F 5 ) 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 1 H NMR, 1 H-PGSE NMR and molar conductivity measurements.

Idioma: Inglés

DOI: 10.1039/C9DT00751B

Año: 2019

Publicado en: Dalton Transactions 48, 16 (2019), 5149-5155
ISSN: 1477-9226

Factor impacto JCR: 4.174 (2019)

Categ. JCR: CHEMISTRY, INORGANIC & NUCLEAR rank: 5 / 45 = 0.111 (2019) - Q1 - T1

Factor impacto SCIMAGO: 1.048 - Inorganic Chemistry (Q1)

Financiación: info:eu-repo/grantAgreement/ES/AEI-MINECO-FEDER/CTQ2016-75816-C2-2-P
Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E707-17R
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/CTQ2016-75816-C2-1-P

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Química Inorgánica (Dpto. Química Inorgánica)