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Temperature-assisted formation of reversible metallophilic Au–Ag interaction arrays.
- Source :
-
Dalton Transactions: An International Journal of Inorganic Chemistry . 4/28/2019, Vol. 48 Issue 16, p5149-5155. 7p. - Publication Year :
- 2019
-
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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MOLAR conductivity
*POLYMERIC nanocomposites
*X-ray diffraction
*CRYSTALLIZATION
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 48
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 135918635
- Full Text :
- https://doi.org/10.1039/c9dt00751b