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(a) (b)

a 0

(c)

COLOR FIGURE 14.2 (a) STM image of trimesic acid molecules adsorbed on a Cu(100) surface at room temperature.
The triangular shape reflects a flat-lying adsorption geometry. Cloverleaf-shaped arrangements of four tma molecules
with a central protrusion represent [Cu(tma) ] n coordination compounds. (b) Model for the [Cu(tma) ] n config-
4 4
uration with a central Cu atom coordinated by four carboxylate ligands. Gray: carbon atoms; red: oxygen atoms;
white: hydrogen atoms; yellow: Cu adatoms. The Cu substrate is represented by the orange lattice where a 3.61 Å.
0
In agreement with the tunneling data the tma triangles do not point straight to the central site, which indicates a
unidentate coordination of the Cu adatom. (c) Regular array of [Cu(tma) ] n complexes. (Reprinted with permission
4
from Lin, N. et al. [2002] “Real-Time Single-Molecule Imaging of the Formation and Dynamics of Coordination
Compounds,” Angew. Chem. Int. Ed. 41, pp. 4779–83).

C
N
O
H

[110]

50
50 Å
T Pd = 325 K
COLOR FIGURE 14.3 Left: PVBA molecules randomly distributed on the Pd(110) surface at low coverage
(θ 0.018ML). The molecules were adsorbed and imaged at a substrate temperature of 325K and deposited with a rate of
5
3 10 ML/s.The atomic rows of the Pd substrate and the dog-bone internal molecular structure are resolved (image size:
19 18nm : U 1.04V, I 1nA). Right: Ball model for unrelaxed PVBA molecules on Pd(110). Large light and dark
2
t
t
grey circles: Pd atomic rows of the surface; small dark grey circles: carbon atoms; yellow: nitrogen atoms; red: oxygen atoms;
and white: hydrogen atoms. The molecular axis is oriented by 35.3° with respect to the [1–10] Pd rows providing optimal
coordination of surface Pd and molecular subunits. (Reprinted with permission from Weckesser, J. et al. [1999] “Binding
and Ordering of Large Organic Molecules on an Anisotropic Metal Surface: PVBA on Pd(110),”Surf. Sci. 431, pp. 168–73.)

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