A versatile solvent-free mechanochemical route to the synthesis of heterometallic dicyanoaurate-based coordination polymers

Csaba Jobbágy, Tünde Tunyogi, G. Pálinkás, Andrea Deák

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The solid-state mechanochemical method was proved to be a fast, simple, and efficient route to the synthesis of heterometallic [Au(CN) 2]-based coordination polymers. Thus, a series of mixed-metal complexes, such as KCo[Au(CN) 2] 3, KNi[Au(CN) 2] 3, Cu(H 2O) 2[Au(CN) 2] 2, and Zn[Au(CN) 2] 2, was obtained by grinding stoichiometric amounts of K[Au(CN) 2] and transition metal(II) chlorides. This solid-state method rapidly yields pure dicyanoaurate-based compounds, also in cases when the aqueous solution synthesis leads to an unseparable mixture of products. In addition, in some cases, the solid state reaction was faster than the corresponding solvent-based reaction. This mechanochemical method can be applied also to main group metals to obtain various cyanoaurate-based heterometallic coordination polymers, such as Me 2Sn[Au(CN) 2] 2 and Ph 3Sn[Au(CN) 2]. For the 2:1 mixture of K[Au(CN) 2] and Me 2SnCl 2, the dramatic enhancement of the reaction rate by the presence of a minor amount of water was noticed. In Ph 3Sn[Au(CN) 2], as was revealed by single-crystal X-ray diffraction, each Ph 3Sn unit is linked to two others by two Au(CN) 2 bridges via Sn-N bonds to form an infinite cyanide-bridged chain. There are no Au•••Au contacts between the chains due to the sterical hindrance of the phenyl groups. A dehydrated blue Co[Au(CN) 2] 2 complex was obtained during grinding or heating of the moderate-pink Co(H 2O) 2[Au(CN) 2] 2 complex. This complex displays a vapochromic response when exposed to a variety of organic solvents, as well as water and ammonia vapors.

Original languageEnglish
Pages (from-to)7301-7308
Number of pages8
JournalInorganic Chemistry
Volume50
Issue number15
DOIs
Publication statusPublished - Aug 1 2011

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gold cyanide
coordination polymers
Polymers
routes
grinding
solid state
Water
Coordination Complexes
Cyanides
synthesis
Solid state reactions
Ammonia
Organic solvents
Reaction rates
Transition metals
Chlorides
Metals
Vapors
Single crystals
cyanides

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

A versatile solvent-free mechanochemical route to the synthesis of heterometallic dicyanoaurate-based coordination polymers. / Jobbágy, Csaba; Tunyogi, Tünde; Pálinkás, G.; Deák, Andrea.

In: Inorganic Chemistry, Vol. 50, No. 15, 01.08.2011, p. 7301-7308.

Research output: Contribution to journalArticle

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