Nonanuclear zinc-gold [ZnAu] heterobimetallic complexes

Nonanuclear zinc-gold heterobimetallic complexes were synthesized in a two-step process. Commercially available carboxy-functionalized phosphine ligands were used for selective binding to Zn and Au centers. In the first step, bipyridine coordinated Zn-metalloligands with free phosphine moieties were...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2021-06, Vol.5 (24), p.8558-8566
Main Authors: Yadav, Ravi, Dahlen, Milena, Singh, Akhil K, Sun, Xiaofei, Gamer, Michael T, Roesky, Peter W
Format: Article
Language:English
Subjects:
Crystallography
Emission analysis
Emission spectra
Gold
Ligands
Phosphines
Photoluminescence
Room temperature
Selective binding
Zinc
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Summary:Nonanuclear zinc-gold heterobimetallic complexes were synthesized in a two-step process. Commercially available carboxy-functionalized phosphine ligands were used for selective binding to Zn and Au centers. In the first step, bipyridine coordinated Zn-metalloligands with free phosphine moieties were prepared. Reaction of Zn-metalloligands with [AuCl(tht)] (tht = tetrahydrothiophene) resulted in the formation of nonanuclear Zn-Au heterobimetallic complexes. The flexibility of the carboxy-functionalized phosphine ligands was shown to be crucial for the formation of aurophilic interactions. Further, the photoluminescence of the Zn-metalloligands and one Zn-Au complex was investigated at room temperature as well as 77 K. The emission spectra showed clear difference between the Zn-metalloligands and the Zn-Au complex. Heterobimetallic nonanuclear Zn-Au complexes are synthesized. The complexes comprise a trinuclear Zn core and six Au( i ) moieties on the periphery. Photoluminescence of the Zn-metalloligand and the Zn-Au complex has also been studied.
ISSN:1477-9226
1477-9234
DOI:10.1039/d1dt01396c