Metal-organic coordination interactions in Fe-terephthalic acid networks on Cu(100).
Metal-organic coordination interactions are prime candidates for the formation of self-assembled, nanometer-scale periodic networks with room-temperature structural stability. We present X-ray photoelectron spectroscopy measurements of such networks at the Cu(100) surface which provide clear evidence for genuine metal-organic coordination. This is evident as binding energy shifts in the O 1s and Fe 3p photoelectron peaks, corresponding to O and Fe atoms involved in the coordination. Our results provide the first clear evidence for charge-transfer coordination in metal-organic networks at surfaces and demonstrate a well-defined oxidation state for the coordinated Fe ions.
Tait
Steven L
SL
Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany. tait@fkf.mpg.de
Wang
Yeliang
Y
Costantini
Giovanni
G
Lin
Nian
N
Baraldi
Alessandro
A
Esch
Friedrich
F
Petaccia
Luca
L
Lizzit
Silvano
S
Kern
Klaus
K