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Direct measurement and modulation of single-molecule coordinative bonding forces in a transition metal complex

Xian Hao ; Nan Zhu ; Tina Gschneidtner (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Elvar Ö. Jönsson ; Jingdong Zhang ; Kasper Moth-Poulsen (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Hongda Wang ; Kristian S. Thygesen ; Karsten W. Jacobsen ; Jens Ulstrup ; Qijin Chi
Nature Communications (2041-1723). Vol. 4 (2013),
[Artikel, refereegranskad vetenskaplig]

Coordination chemistry has been a consistently active branch of chemistry since Werner’s seminal theory of coordination compounds inaugurated in 1893, with the central focus on transition metal complexes. However, control and measurement of metal–ligand interactions at the single-molecule level remain a daunting challenge. Here we demonstrate an interdisciplinary and systematic approach that enables measurement and modulation of the coordinative bonding forces in a transition metal complex. Terpyridine is derived with a thiol linker, facilitating covalent attachment of this ligand on both gold substrate surfaces and gold-coated atomic force microscopy tips. The coordination and bond breaking between terpyridine and osmium are followed in situ by electrochemically controlled atomic force microscopy at the single-molecule level. The redox state of the central metal atom is found to have a significant impact on the metal–ligand interactions. The present approach represents a major advancement in unravelling the nature of metal–ligand interactions and could have broad implications in coordination chemistry.



Denna post skapades 2013-08-01. Senast ändrad 2014-09-02.
CPL Pubid: 180426

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)

Ämnesområden

Oorganisk kemi
Nanoteknik

Chalmers infrastruktur